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Journal articles on the topic 'Dynamic modulus of elasticity'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 June 2025

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Brožovský, Jiří, and Ámos Dufka. "Comparison of Dynamic Young's Modulus of Elasticity Values Measured by Ultrasonic Pulse and Resonance Methods." Advanced Materials Research 1100 (April 2015): 193–96. http://dx.doi.org/10.4028/www.scientific.net/amr.1100.193.

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Dynamic Young ́s modulus of elasticity can be determined by ultrasonic pulse method and resonance method. Because of the difference in the way of introducing tension into a test specimen, the values of modulus of elasticity differ. Dynamic Young ́s modulus of elasticity measured by ultrasonic pulse method is higher; the difference stated for concrete is 5 to 20%. It was found that the dynamic Young's modulus of elasticity of calcium silicate bricks and prisms measured by ultrasonic pulse method is on average higher by 9.5% than dynamic Young's modulus of elasticity measured by resonance method. If dynamic Young's modulus of elasticity is converted to static modulus of elasticity, this difference has to be taken into account by means of appropriate coefficient.

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Pramreiter, Maximilian, Alexander Stadlmann, Florian Linkeseder, Jozef Keckes, and Ulrich Müller. "Non-destructive testing of thin birch (Betula pendula Roth.) veneers." BioResources 15, no. 1 (2020): 1265–81. http://dx.doi.org/10.15376/biores.15.1.1265-1281.

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In technical applications of wood-based composites, the predictability of elasticity and strength is important. The aim of this study was to predict the static modulus of elasticity and tensile strength of thin (0.55 mm ± 0.05 mm) birch veneers. Based on the dynamic modulus of elasticity estimated via means of wave transmission time the observed dynamic modulus of elasticity was on average 14% lower than the corresponding static modulus of elasticity. This difference could be explained by a decreased measuring area during the tensile testing or by defects within the samples. The dynamic modulus of elasticity correlated well with the static modulus of elasticity (r = 0.821). Therefore, using wave transmission time to non-destructively predict the elasticity of veneers proves to be a promising tool. The dynamic modulus of elasticity showed a significant and positive correlation with the tensile strength (r = 0.665), but this correlation was weaker than with the static modulus of elasticity. Therefore, the wave transmission time or the static modulus of elasticity must be combined with additional strength-influencing properties, such as fiber angle or density, to allow for a highly accurate prediction of tensile strength.

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Almeida Del Savio, Alexandre Almeida Del, Darwin La Torre La Torre Esquivel, Julian Carrillo, and Emilio Chi Chi Yep. "Determination of Polypropylene Fiber-Reinforced Concrete Compressive Strength and Elasticity Modulus via Ultrasonic Pulse Tests." Applied Sciences 12, no. 20 (2022): 10375. http://dx.doi.org/10.3390/app122010375.

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Compressive strength and elasticity modulus are the main mechanical properties of concrete. The non-destructive ultrasound pulse test can be used to determine these properties without compromising the structure’s integrity. This study seeks to assess whether a correlation exists (1) between the Reinforcement Index (RI) and the mechanical properties, (2) between the RI and the dynamic properties, and (3) among the dynamic properties of polypropylene fiber-reinforced concrete. The RI was modified through fiber volume fraction (0-, 0.4-, 0.8- and 1.2%) and fiber length (40, 50 and 60 mm). The dynamic properties were assessed through dynamic elasticity modulus and ultrasonic pulse velocity (UPV), which were determined by direct, semi-direct, and indirect prospect methods. Finally, compressive strength, static elasticity modulus, and Poisson’s ratio were assessed through destructive tests. Their relationship with UPV and the dynamic elasticity modulus is also subsequently studied. The results reveal a correlation between RI and compressive strength and UPV; however, the static elasticity modulus only exhibits a correlation with UPV in one of its measurement methods. Finally, empirical models were developed for predicting compressive strength, elasticity modulus as a function of ultrasonic pulse velocity and RI, and dynamic elasticity modulus as a function of compressive strength and RI.

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Medvedev, M. A., A. M. Cherkasov, and E. V. Tararushkin. "Temperature dependence of dynamic and static modulus of elasticity of lightweight expanded clay aggregate concrete." Journal of Physics: Conference Series 2094, no. 4 (2021): 042052. http://dx.doi.org/10.1088/1742-6596/2094/4/042052.

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Abstract The paper presents experimental research the static and dynamic modulus of elasticity of lightweight expanded clay aggregate concrete with averaged density of 1000 kg/m3. The static and dynamic modulus are obtained depending on the influence of temperature in the range from 5 to 50 °C with a step of 15 °C. The dynamic modulus was determined without pre-compression with a testing machine Asphalt Mixture Performance Tester. Besides the modulus of elasticity of lightweight concrete, the temperature dependence of unconfined compressive strength was also determined. Analysis of experimental data showed that with an increase in temperature, strength and modulus of elasticity slightly decrease, which is typical for concretes. For all cases, the temperature dependence can be characterized according to the linear law. Comparison of the static and dynamic modulus of elasticity showed that the dynamic modulus is 60-74% greater than the static modulus over the entire range of the studied temperatures.

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Mollahassani, Amir, AmirHooman Hemmasi, Habibollah Khademi Eslam, Amir Lashgari, and Behzad Bazyar. "Dynamic and static comparison of beech wood dovetail, tongue and groove, halving, and dowel joints." BioResources 15, no. 2 (2020): 3787–98. http://dx.doi.org/10.15376/biores.15.2.3787-3798.

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Dynamic and static elastic properties beech wood joints were assessed. Conventional joints, namely dovetail, tongue and groove, dowel, and halving joints were prepared with beech wood (Fagus orientalis Lipsky) using polyvinyl acetate and cyanoacrylate adhesives. The results of the dynamic and static modulus of elasticity of the joints in this research indicated the highest reduction trends in halving, dowel, tongue and groove, and dovetail joints, respectively. The modulus of dovetail joint elasticity, its homogeneous joint texture, and lack of an extended adhesive line, corresponded to that of the jointed samples. The average static modulus of elasticity was approximately 10.5% lower than that of the dynamic modulus of elasticity. The results of the Student’s t-test indicated a significant difference between the mean of dynamic and the mean of static modulus of elasticity, significance at 5% level and the Pearson correlation test indicated that the dynamic and static modulus of elasticity of the samples were significant at the 5% level and indicated a positive correlation. Based on the observed correlation in the dynamic and static tests’ results, using these methods, dynamic assessment of NDTs may be regarded as an appropriate alternative in standardizing destructive static testing for wood assessment and categorization.

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Prošek, Zdeněk, and Jaroslav Topič. "LONG-TIME INVESTIGATION OF CEMENT COMPOSITE MATERIAL WITH MICRONIZED WASTE MARBLE POWDER: DYNAMIC MODULES." Acta Polytechnica CTU Proceedings 13 (November 13, 2017): 93. http://dx.doi.org/10.14311/app.2017.13.0093.

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This article focus on “blended cement”. The blended cement was created by using waste marble powder (WMP) as a partial replacement for cement. We investigated the influence of WMP on the developing of the dynamic modulus of elasticity and the dynamic shear modulus in time. Four different cement composites with WMP as a partial replacement for cement were studied (5, 10, 15 and 50 wt. %) together with reference samples. Dynamic modulus of elasticity was monitored during the first 377 days since manufacture by use of non-destructive testing (resonance method). The results showed that WMP in a small amount had a no effect on the dynamic modulus of elasticity and the dynamic shear modulus.

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OVSYANNIKOV, S. N., O. V. LELYUGA, A. S. SAMOKHVALOV, E. A. LYMAREVA, and T. S. BOLSHANINA. "EXPERIMENTAL STUDIES OF ELASTIC-DISSIPATIVE PROPERTIES OF STRUCTURAL AND SEALING MATERIALS OF TRANSLUCENT STRUCTURES." Building and reconstruction 104, no. 6 (2022): 56–68. http://dx.doi.org/10.33979/2073-7416-2022-104-6-56-68.

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The analytical solution of the problem of sound and vibration passage through structures and joints requires determining the elastic-dissipative properties of structural and sealing materials of translucent structures: the dynamic modulus of elasticity and loss factor. In this paper, the parameters of the dynamic modulus of elasticity and loss coefficient of some well-known building materials are investigated and experimentally established in comparison with previously obtained data from other authors. To automate and accurately measure the coefficient of dynamic characteristics of materials, a measurement technique was used, using Zetlab software and measuring equipment. When measuring the dynamic modulus of elasticity of sealing materials, LDS measuring equipment was used. The refined values obtained for the dynamic modulus of elasticity and the loss factor of materials allow them to be used in vibroacoustic calculations of translucent structures.

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Qu, Tie Jun, and Rong Huan Xu. "The Influence of Ratio of Reinforcement to Modulus of Elasticity of Reinforce Concrete Component." Advanced Materials Research 859 (December 2013): 233–37. http://dx.doi.org/10.4028/www.scientific.net/amr.859.233.

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Modulus of elasticity is an important mechanical parameter in analysis and design of reinforce concrete structures. The present value of modulus of elasticity ，which has rare relation with ratio of reinforcement ，is based on plain concrete. Authors deduced an equation between modulus of elasticity and ratio of reinforcement, and then an experimental study was conducted on 11 groups’ component of reinforce concrete with different ratio of reinforcement. At last, an equation for modulus of elasticity of different ratio of reinforcement determined by regression, using least squared method, was described. A cantilever, whose dynamic characteristics and response were calculated, was taken as an example to analyze influence of ratio of reinforcement on the structural analysis .Result shows that ratio of reinforcement has effect on modulus of elasticity . Moreover, if general modulus is ignored when calculate dynamic response, it will cause deviation.

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Zhang, Junzhi, Yueming Wang, Xixi Li, Yurong Zhang, and Lingjie Wu. "Enhancing Concrete Mechanical Properties through Basalt Fibers and Calcium Sulfate Whiskers: Optimizing Compressive Strength, Elasticity, and Pore Structure." Materials 17, no. 7 (2024): 1706. http://dx.doi.org/10.3390/ma17071706.

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To study the effects of basalt fibers (BFs), calcium sulfate whiskers (CSWs), and modified calcium sulfate whiskers (MCSWs) on the compressive strength and dynamic modulus of elasticity of concrete, this paper utilizes Mercury Intrusion Porosimetry (MIP) to measure the microstructure of concrete and calculate the fractal dimension of pore surface area. The results indicate that both CSWs and BFs can increase the compressive strength of concrete. CSWs can enhance the dynamic modulus of elasticity of concrete, while the effect of BFs on the dynamic modulus of elasticity is not significant. The improvement in compressive strength and dynamic modulus of elasticity provided by MCSWs is significantly greater than that provided by CSWs. Both CSWs and BFs can effectively improve the pore structure of concrete and have a significant impact on the surface fractal dimension. CSWs inhibit the formation of ink-bottle pores, while BFs increase the number of ink-bottle pores. Due to the ink-bottle pore effect, the fractal dimension of the capillary pore surface is generally greater than three, lacking fractal characteristics. The compressive strength and dynamic modulus of elasticity of concrete have a good correlation with the fractal dimensions of large pores and transition pores.

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Li, Zhong Hua, Hui Xu, Chao Su, Duo Zheng, and Jia Liang Yang. "Effect of Water-Binder Ratio and Mineral Admixture on Frost Scaling Resistance of Concrete." Advanced Materials Research 881-883 (January 2014): 1212–15. http://dx.doi.org/10.4028/www.scientific.net/amr.881-883.1212.

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In order to increase freeze-salt scaling resistance of concrete, effect of water-binder ratio, fly ash, slag and silica fume on freeze-salt scaling resistance are researched according to the CDF method. The results show that the scaled mass and the dynamic modulus of elasticity loss rate of the concrete are reduced with decreasement of water-binder ratio. When mineral admixture compound is added into concrete the scaled mass and the dynamic modulus of elasticity loss rate are also reduced. Compared with fly ash and slag the trend is more obvious as result of fume and slag added. The scaled mass and the loss rate of dynamic elasticity modulus are slightly reduced with decreasement of fly ash and slag. But the scaled mass and the loss rate of dynamic elasticity modulus are obviously reduced with increasement of silica fume and slag.

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Haneefa, M. K., S. Girish, R. V. Ranganath, and B. Saikia. "A Structural Dynamic Approach to Evaluate Modulus of Elasticity of Cantilever Beam." Applied Mechanics and Materials 852 (September 2016): 483–88. http://dx.doi.org/10.4028/www.scientific.net/amm.852.483.

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The modulus of elasticity is an important property of any structural member or machine component. It has a vital role in designing the structural components or machine components for their specific use. This paper discusses evaluation of modulus of elasticity of cantilever beams made out of Self-Compacting Concrete (SCC) using a structural dynamic approach – the free vibration test. The concept of free flexural vibration essentially involves setting up a specimen (beam) into ‘free vibration’ by imparting an initial condition, such that the specimen vibrates in its fundamental natural frequency. The digital data were stored using an efficient data acquisition system (Daisy lab version 5 software) and processed using Fast Fourier Transformation (FFT) (Acceleration v/s Time). The fundamental natural frequencies thus obtained were used to evaluate dynamic modulus of elasticity of SCC specimens using well established basic equations of structural dynamics. The study revealed that the dynamic modulus of elasticity for the cantilever beams were equal to the initial tangent modulus obtained by conventional compresso-meter method as per ASTM C 469-02. Moreover, the free vibration tests exhibited high consistency and repeatability. This technique can be of potential use as Non-Destructive Testing (NDT) for monitoring the health of in situ structures or machine components.

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Mohammad, Iqbal Khan. "Non-Destructive Testing for Concrete: Dynamic Modulus and Ultrasonic Velocity Measurements." Advanced Materials Research 243-249 (May 2011): 165–69. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.165.

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Nondestructive testing (NDT) is a technique to determine the integrity of a material, component or structure. The commonly NDT methods used for the concrete are dynamic modulus of elasticity and ultrasonic pulse velocity. The dynamic modulus of elasticity of concrete is related to the structural stiffness and deformation process of concrete structures, and is highly sensitive to the cracking. The velocity of ultrasonic pulses travelling in a solid material depends on the density and elastic properties of that material. Non-destructive testing namely, dynamic modulus of elasticity and ultrasonic pulse velocity was measured for high strength concrete incorporating cementitious composites. Results of dynamic modulus of elasticity and ultrasonic pulse velocity are reported and their relationships with compressive strength are presented. It has been found that NDT is reasonably good and reliable tool to measure the property of concrete which also gives the fair indication of the compressive strength development.

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Kazmierczak, Claudio de Souza, Joana Kirchner Benetti Boaro, Monique Palavro Lunardi, Marlova Piva Kulakowski, and Mauricio Mancio. "Influence of the moisture content on the dynamic modulus of elasticity of concrete made with recycled aggregate." Ambiente Construído 19, no. 2 (2019): 79–89. http://dx.doi.org/10.1590/s1678-86212019000200309.

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Abstract The elastic behavior of the concrete is estimated from its strength or determined by static or dynamic tests. However, because the codes of practice do not standardize the internal moisture content of the concrete and disregard the use of recycled aggregates when proposing equations for the estimation of the modulus of elasticity, discrepancies between the values measured and estimated are frequent. The influence of the moisture content of concrete containing basaltic coarse aggregates and coarse recycled concrete aggregate in the dynamic modulus of elasticity is discussed in this paper. A basalt coarse aggregate and two recycled coarse aggregates where used. For each type of coarse aggregate, concrete with compression strength between 25 MPa and 55 MPa were produced. The dynamic modulus of elasticity of the saturated samples were determined and range from 26 GPa to 46 GPa. There is a significant difference in the value of the dynamic modulus of elasticity for dry concrete versus saturated concrete, also influenced by the type of aggregate. Estimations of the modulus of elasticity from the compressive strength equations proposed by the codes of practice must be improved considering its characteristics.

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Hu, Wengang, Shuang Li, and Yan Liu. "Vibrational characteristics of four wood species commonly used in wood products." BioResources 16, no. 4 (2021): 7101–11. http://dx.doi.org/10.15376/biores.16.4.7101-7111.

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The effects of the moisture content, density, and striking direction of a hammer on the vibrational characteristics, i.e., the fundamental frequency and dynamic modulus of elasticity, of four wood species, i.e., poplar (Populus tomentosa), mahogany (Swietenia mahagoni), beech (Fagus orientalis), and ash (Fraxinus excelsior), commonly used in wood products were investigated, aiming to provide basic evidence for the nondestructive testing of wood materials. The results showed that the effect of the wood species on the fundamental frequency, dynamic modulus of elasticity, and static modulus of elasticity was statistically significant. The dynamic moduli of elasticity of the four wood species were higher than the corresponding static moduli of elasticity. The effect of the striking direction on the dynamic modulus of elasticity was not significant, indicating that no matter where the hammer struck, i.e., radial and tangential surfaces, the fundamental frequency was essentially constant. Negative relationships were found between the fundamental frequency and the density and moisture when the data of the four wood species were viewed as a population sample. The vibrational characteristics of each wood species varied, which can be applied to the nondestructive testing of wood.

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Zhou, Xiao Er, Yan Kun Zhang, and De Min Jiang. "Experimental Research on the Dynamic Young’s Modulus of Specified Density Concrete." Advanced Materials Research 250-253 (May 2011): 164–67. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.164.

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From the experimental research, the relations between the dynamic modulus of elasticity and natural vibration frequency of specified density concrete are studied, the static Young’s modulus and dynamic modulus are compared. Based on regression analysis, the influence of different Substitution ratio of lightweight aggregate, age of concrete and cement water ratio is studied. According to the test results, the formula of natural vibration frequency and the dynamic modulus of elasticity of Specified density concrete is given, which provide theory basis for the nondestructive detector of the specified density concrete.

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Kobaka, Janusz, Jacek Katzer, and Machi Zawidzki. "Dynamic Properties of SFRC Made on the Basis of Waste Sand." Pomiary Automatyka Robotyka 29, no. 1 (2025): 75–79. https://doi.org/10.14313/par_255/75.

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The article presents the results of non-destructive testing of steel fiber reinforced concrete (SFRC) based on waste sand. Fiber concrete beams with different steel fiber content were subjected to two types of free vibrations: torsional and flexural vibrations. Based on the tests and Fourier analysis, the frequencies of these vibrations were determined. They were used to determine the dynamic modulus of elasticity (Young’s modulus), the dynamic shear modulus (modulus of rigidity) and the dynamic Poisson’s ratio. In the next stage, the influence of steel fibers on these parameters was determined. The tests have shown that the addition of steel fibers increases the value of dynamic modulus of elasticity and the dynamic shear modulus up to a certain critical fiber content, beyond which the values of these moduli decrease; moreover, steel fibers do not affect the value of the dynamic Poisson’s ratio.

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Halamová, Romana, Dalibor Kocáb, Barbara Kucharczyková, Petr Misák, and Martin Alexa. "Influence of the Poisson’s Ratio on the Value of the Dynamic Modulus of Elasticity of Cement Materials in the Early Stage of Ageing." Solid State Phenomena 292 (June 2019): 50–55. http://dx.doi.org/10.4028/www.scientific.net/ssp.292.50.

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The paper deals with the influence of the Poisson’s ratio on the calculated modulus of elasticity of a cementitious composite in the early stage of its ageing. The dynamic modulus of elasticity was determined in the first 24 hours of ageing of the material using the Vikasonic ultrasonic device. Within the experiment, two types of cementitious composites were mixed - cement paste and cement mortar, both having the same water/cement ratio. It is presumed that the value of the dynamic modulus of elasticity calculated on the basis of ultrasonic measurement is closely related to the value of the Poisson’s ratio, which is not constant during ageing of the cementitious composite but varies depending on the degree of hydration of the material. The output of the paper is a comparison of the development of the dynamic modulus of elasticity calculated using different values of the Poisson’s ratio.

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Alexa-Stratulat, Sergiu-Mihai, Petru Mihai, Ana-Maria Toma, George Taranu, and Ionut-Ovidiu Toma. "Influence of Concrete Strength Class on the Long-Term Static and Dynamic Elastic Moduli of Concrete." Applied Sciences 11, no. 24 (2021): 11671. http://dx.doi.org/10.3390/app112411671.

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Construction materials, among which concrete is by far the most used, have followed a trend of continuously increasing demand in real estate. A relatively small number of research works have been published on the long-term material properties of concrete in comparison to studies reporting their findings at standard curing ages of 28 days. This is due, in part, to the length of time one must wait until the intended age of concrete is reached. The present paper contributes to filling this gap of information in terms of the strength and dynamic elastic properties of concrete. The dynamic modulus of elasticity may be used to assess the static modulus of elasticity (Young’s modulus), a key property used during the design stage of a structure, in a non-destructive manner. This paper presents the results obtained from laboratory tests on the long-term (6 years) characterization of concrete from the point of view of dynamic shear and longitudinal moduli of elasticity, dynamic Poisson’s ratio, static modulus of elasticity, compressive and tensile splitting strengths, and their change depending on the concrete strength class.

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Korkmaz, Guldem, Sinan Sargin, and Sadik Oztoprak. "Comparative Experimental Study on the Dynamic and Static Stiffness of Sandy Soils Utilizing Alpan’s Empirical Approach." Applied Sciences 15, no. 12 (2025): 6389. https://doi.org/10.3390/app15126389.

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Stiffness parameters are very important and effective in the constitutive models used in finite element analysis. It is not easy or common to obtain these parameters in the laboratory. However, even if the modulus is determined in the small and medium deformation range, there is a need to make transitions in both static and dynamic parameters. In almost all studies, the Alpan approach is used for the relationship between static and dynamic moduli of elasticity. Therefore, a better understanding of this approach is required. In this study, the relationship between static and dynamic stiffness was determined by monotonic triaxial and resonant column tests on five different sand samples with different relative stiffness and grain distributions, and the results were compared with Alpan’s approach. It is not clear which of the initial or maximum modulus of elasticity (E0), unloading-reloading modulus (Eur) or secant modulus of elasticity (E50) are used by Alpan for static modulus of elasticity (Estat). Therefore, the coefficient Rsec = Estat/E50 was introduced and queried to indicate which Estat is a multiple of E50. In connection with this, the dynamic modulus of elasticity (Edyn) was calculated using the small deformation shear modulus (G0) obtained from resonant column experiments and assuming Poisson’s ratios (ν = 0.2, 0.3, 0.4). It was found that Alpan’s empirical approach achieved a significant degree of agreement for the sands in this study and the studies of other researchers. It was observed that the best agreement between dynamic and static stiffness ratio (Edyn/Estat) and static modulus of elasticity (Estat) for sand specimens in this study was obtained with υ = 0.2 and Rsec = 2. According to the experimental results, it is safe to say that Alpan’s empirical approach is still valid when the values of Poisson’s ratio and Estat in the very small deformation region are used. Since there are limited studies on Edyn/Estat ratio in the literature, it is thought that the findings in this paper will assist engineers and researchers. However, this work would also assist engineers in selecting appropriate stiffness parameters for calibrating constitutive models.

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Brunetti, Michele, Giovanni Aminti, Margherita Vicario, and Michela Nocetti. "Density Estimation by Drilling Resistance Technique to Determine the Dynamic Modulus of Elasticity of Wooden Members in Historic Structures." Forests 14, no. 6 (2023): 1107. http://dx.doi.org/10.3390/f14061107.

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(1) The assessment of the mechanical properties of old timber is essential for the proper maintenance of wooden structures. (2) Among the non-destructive properties, the dynamic modulus of elasticity is one of the best predictors of the mechanical characteristics of the members, but it requires the determination of wood density to be determined. (3) Thus, wood density was estimated by drilling resistance measurements, developing species-specific prediction equations for silver fir, chestnut and poplar. (4) The estimated density was combined with the stress wave velocity propagating longitudinally through the wooden piece, and the dynamic modulus of elasticity was calculated. (5) Medium-high coefficient determinations (R2 from 0.79 to 0.94) were found for density estimation, and medium coefficient determinations (R2 from 0.53 to 0.60) were found for the estimation of the static modulus of elasticity using the dynamic modulus.

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Suazo Uribe, Manuel, Alexander Opazo Vega, Claudio Montero, et al. "Preliminary study of Acacia dealbata logs for use in construction: Visual characterization and non-destructive testing." Maderas. Ciencia y Tecnología 27 (April 3, 2025): e2325. https://doi.org/10.22320/s0718221x/2025.23.

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This study provides a preliminary mechanical characterization of minimally processed Acacia dealbata logs to assess their potential valorisation as a by-product of invasive species management. A total of 45 logs (90–143 mm diameter) from two harvest seasons groups, spring (17 logs, 2.0 m) and winter (28 logs, 2.4 m), were visually selected and evaluated for dynamic modulus of elasticity using longitudinal stress wave and transverse vibration tests. Testing was conducted in two moisture content states: air-dried (> 12%) and kiln-dried (≈ 12%). Significant differences between the two groups necessitated separate analyses and suggested a relationship between harvesting season and physical-mechanical properties. Although dynamic properties increased post-kiln drying, initial dynamic modulus of elasticity values were lower due to elevated initial moisture content. Visual characteristics exhibited weak correlations with dynamic properties, whereas high correlations were observed between adjusted dynamic modulus of elasticity values for both moisture states (r > 0,90 for longitudinal stress wave; r > 0,70 for transverse vibration). Adjusted dynamic modulus of elasticity values (18,29/14,00 GPa for longitudinal stress wave; 16,32/12,69 GPa for transverse vibration) were comparable to prior studies and support a potential classification of Acacia dealbata (mimosa) logs for structural applications.

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Mao, Ji Ze, Zong Min Liu, Koichi Ayuta, and Wan Jie Yin. "Correlation Analysis of Evaluation Indexes for Freeze-Thaw Damage of Lightweight Aggregate Concrete." Key Engineering Materials 452-453 (November 2010): 657–60. http://dx.doi.org/10.4028/www.scientific.net/kem.452-453.657.

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Freeze-thaw damage is one of the most representative damages in concrete durability. In this study, rapid freezing and thawing tests were conducted to investigate the freeze-thaw resistance and analyze the correlation of the evaluation indexes of lightweight aggregate concrete with different water-cement ratios. The high correlation was confirmed between the length change and relative dynamic modulus of elasticity of lightweight aggregate concrete. The relative dynamic modulus of elasticity decreased with the increase of concrete length. However, the correlation was different according to the water-cement ratio values of lightweight aggregate concrete. The higher water-cement ratios, the lower expansion values of lightweight aggregate concrete when the relative dynamic modulus of elasticity decreased to the same degree under freezing and thawing action.

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Carrasco, E. V. M., Fernando Murilo Gontijo Ramos, L. G. Moura, et al. "Determination of Elastic Constants of Cross-Laminated Bamboo (CLB) through Non-Destructive Testing." Key Engineering Materials 948 (June 6, 2023): 129–38. http://dx.doi.org/10.4028/p-45nq7z.

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The aim of this work is the evaluation by non-destructive impulse excitation tests, the modulus of elasticity (E) and the transversal deformation modulus (G) of cross laminated bamboo (CLB). Tests were performed on twenty-three CLB specimens measuring: 12 mm (height), 40 mm (width) and 12 mm (length). Twelve specimens have two lamellas with fibers at 0 °, longitudinal direction, and one layer with fibers at 90 °, normal direction (N) and the other eleven specimens have two layers in the normal direction and one in the longitudinal direction (L). The tests were performed using the Sonelastic apparatus indicated for the estimation of the dynamic modulus of elasticity and the damping of materials by the impulse excitation technique. A software attached to the apparatus analyzes the acoustic wave generated, and from it, the dynamic modulus of elasticity is determined. In order to verify the significance of this estimation, semi-destructive, three-point bending tests were performed in a universal test machine, determining E and G. It was concluded that the estimation of the modulus of elasticity is very significant when compared with the semi-destructive tests, and this method can be used to estimate the elasticity modulus of the CLB with high precision (R2 = 99% and p-value <0.001). Modulus of elasticity in the longitudinal direction were five times larger than those in the normal direction.

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Qin, Yongjun, Jiejing Chen, Ke Liu, and Yi Lu. "DURABILITY PROPERTIES OF RECYCLED CONCRETE WITH LITHIUM SLAG UNDER FREEZE-THAW CYCLES." Materiali in tehnologije 55, no. 2 (2021): 171–81. http://dx.doi.org/10.17222/mit.2020.126.

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A water freeze-thaw cycle and sulfate freeze-thaw coupling cycle were explored experimentally to evaluate the durability of recycled concrete with lithium slag (LS). The damage-deterioration law was studied from the aspects of mass-change rate, relative dynamic modulus of elasticity, and cube’s compressive strength. Based on the relative dynamic modulus of elasticity, the damage-degree equation of the concrete was fitted, and a mechanical-attenuation model related to this parameter and the cube’s compressive strength was established and verified. The damage mechanism under the action of the sulfate freeze-thaw cycle was revealed through scanning electron microscopy (SEM). The combination of recycled coarse aggregate (RCA) and LS was beneficial to the anti-deterioration ability of the concrete. During the cycle experiments, the mass and relative dynamic modulus of elasticity increased initially and then decreased, while the cube’s compressive strength declined continually. The concrete with a 30 % RCA substitution rate and 20 % LS exhibited the optimal comprehensive durability, and specimens with excessive LS showed more susceptibility to sulfate erosion. The residual compressive strength of concrete structures can be evaluated by measuring the relative dynamic modulus of elasticity as the two parameters are ideally correlated.

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Shang, Huai-Shuai, and Ting-Hua Yi. "Freeze-Thaw Durability of Air-Entrained Concrete." Scientific World Journal 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/650791.

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One of the most damaging actions affecting concrete is the abrupt temperature change (freeze-thaw cycles). The types of deterioration of concrete structures by cyclic freeze-thaw can be largely classified into surface scaling (characterized by the weight loss) and internal crack growth (characterized by the loss of dynamic modulus of elasticity). The present study explored the durability of concrete made with air-entraining agent subjected to 0, 100, 200, 300, and 400 cycles of freeze-thaw. The experimental study of C20, C25, C30, C40, and C50 air-entrained concrete specimens was completed according to “the test method of long-term and durability on ordinary concrete” GB/T 50082-2009. The dynamic modulus of elasticity and weight loss of specimens were measured after different cycles of freeze-thaw. The influence of freeze-thaw cycles on the relative dynamic modulus of elasticity and weight loss was analyzed. The findings showed that the dynamic modulus of elasticity and weight decreased as the freeze-thaw cycles were repeated. They revealed that the C30, C40, and C50 air-entrained concrete was still durable after 300 cycles of freeze-thaw according to the experimental results.

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Valenzuela, M. A., J. M. Bentley, and R. D. Lorenz. "Dynamic Online Sensing of Sheet Modulus of Elasticity." IEEE Transactions on Industry Applications 46, no. 1 (2010): 108–20. http://dx.doi.org/10.1109/tia.2009.2036553.

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Roohnia, Mehran, Seyed-Ehsan Alavi-Tabar, Mohammad-Ali Hossein, Loïc Brancheriau, and Ajang Tajdini. "Dynamic modulus of elasticity of drilled wooden beams." Nondestructive Testing and Evaluation 26, no. 02 (2011): 141–53. http://dx.doi.org/10.1080/10589759.2010.533175.

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Рымкевич, Павел Павлович, та O. V. Rymkevich. "Мodulus of Elasticity as a Function of a Process in Hereditary Mechanics". Izvestiya of Altai State University, № 1(129) (28 березня 2023): 49–54. http://dx.doi.org/10.14258/izvasu(2023)1-07.

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The article considers the problem of determining the modulus of elasticity for polymer materials. The measurement process of these materials is considerably complex, mainly due to the fact that they comply with the laws of viscoelasticity. The Boltzmann — Volterra method is applied to the consideration of the behavior of a hereditarily elastic body, namely, to synthetic threads. We revealed that the elastic modulus for polymer materials is not a constant value and depends on the frequency of exposure during the deformation of the material. It is particularly noted that the modulus of elasticity is not a function of the state, but a function of the process. In this regard, it is necessary to consider various modes of deformation, namely static, acoustic, and dynamic modes. The Boltzmann heredity principle is utilized to provide a clear understanding of the concepts of static, dynamic, and acoustic modulus of elasticity. Furthermore, the applicability of the Boltzmann equation to dynamic mechanical processes is analyzed using two methods — the hierarchy of relaxation times and the method of linearization. In addition, the concept of the interaction core of static and dynamic parts of deformation is introduced. This concept helps to explain the relationship between the static and dynamic moduli of elasticity and their impact on material properties.

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Jin, Yuqi, Teng Yang, Hyeonu Heo, et al. "Novel 2D Dynamic Elasticity Maps for Inspection of Anisotropic Properties in Fused Deposition Modeling Objects." Polymers 12, no. 9 (2020): 1966. http://dx.doi.org/10.3390/polym12091966.

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In this study, a novel ultrasonic non-destructive and non-invasive elastography method was introduced and demonstrated to evaluate the mechanical properties of fused deposition modeling 3D printed objects using two-dimensional dynamical elasticity mapping. Based on the recently investigated dynamic bulk modulus and effective density imaging technique, an angle-dependent dynamic shear modulus measurement was performed to extract the dynamic Young’s modulus distribution of the FDM structures. The elastographic image analysis demonstrated the presence of anisotropic dynamic shear modulus and dynamic Young’s modulus existing in the fused deposition modeling 3D printed objects. The non-destructive method also differentiated samples with high contrast property zones from that of low contrast property regions. The angle-dependent elasticity contrast behavior from the ultrasonic method was compared with conventional and static tensile tests characterization. A good correlation between the nondestructive technique and the tensile test measurements was observed.

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Yan, Hai Cheng, Hou Jiang Zhang, Lei Zhu, and Yan Liang Sun. "Measurement of Dynamic and Static Modulus for Thin Particleboard." Advanced Materials Research 217-218 (March 2011): 402–6. http://dx.doi.org/10.4028/www.scientific.net/amr.217-218.402.

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This document explains and demonstrates a new means of dynamic and static bending evaluation of modulus of elasticity for small samples of thin wood composites. This means is based on the principle of cantilever-beam bending and free vibration, and a cantilever beam testing apparatus has been developed according to this principle. Three kinds of thin particleboard obtained from market were processed and tested. The testing results show that there are significant linear correlations between the cantilever dynamic modulus and the static bending modulus. Through this method, it is feasible to measure the modulus of elasticity for thin wood composites, and compared with traditional method, the static bending test; it can save more time and reduce damage.

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Грешта, Виктор Леонидович, Дмитрий Викторович Павленко, Ярослав Викторович Двирнык та Дарья Владимировна Ткач. "РАСЧЕТНО-ЭКСПЕРИМЕНТАЛЬНАЯ МЕТОДИКА ОПРЕДЕЛЕНИЯ ДИНАМИЧЕСКОГО МОДУЛЯ УПРУГОСТИ ПРИРАБАТЫВАЕМЫХ УПЛОТНИТЕЛЬНЫХ ПОКРЫТИЙ ТУРБИН ГТД". Aerospace technic and technology, № 8 (31 серпня 2019): 105–13. http://dx.doi.org/10.32620/aktt.2019.8.16.

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The aim of the work was the development and testing of a method for determining the dynamic modulus of elasticity of running-in sealing gasket coatings for GTE turbines. Many contradictory requirements are put forward to these coatings, therefore, to satisfy them, it was proposed to apply coatings with variable properties at various stages of the life cycle of gas turbine engines. However, the development of new coatings requires a variety of mechanical tests, including to evaluate the dynamic modulus of elasticity. The porous structure and, accordingly, the low strength of the developed coatings do not allow the use of standard methods for the evaluation of mechanical properties, so there is a need to develop a special method for determining the elastic modulus. In the course of the study, the finite element method, statistical methods, experimental methods for determining the natural frequency of oscillations were applied. Investigations were carried out for running-in sealing coating of the stator of turbines of gas turbine engines KNA-82 + CoNiCrAlY. The numerical experiment was performed in the Ansys Work-bench 2019 R2 software package. Since coatings are used at elevated temperatures, it was necessary to estimate the modulus of elasticity at various temperatures, which required additional studies of temperature-dependent properties that affect the desired value. As a result of the implementation of the plan of a numerical experiment to determine the frequency of natural oscillations of samples with a coating while varying its elastic modulus and temperature, as well as solving the inverse problem of establishing the dependence of the dynamic elastic modulus on the natural oscillation frequency of a coated sample, we developed a calculation and experimental method for determining the dynamic modulus elasticity of running-in sealing coatings of GTE turbines. The developed technique is used to determine the dynamic modulus of elasticity of running-in coatings of different chemical composition and structure in the range of operating temperatures, which can be used to optimize their composition, structure, and properties.

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He, Lan, Yuwei Liang, Liang Zhang, Jing Zhou, Ruofan Wang, and Zhenbo Liu. "Measurement and Analysis of the Vibration Responses of Piano Soundboards with Different Structures." Materials 17, no. 5 (2024): 1004. http://dx.doi.org/10.3390/ma17051004.

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The effect of structure on the vibration response was explored for four piano soundboards with different but commonly adopted structures. The vibration response was obtained using the free-vibration method, and the values of the dynamic modulus of elasticity and dynamic shear modulus obtained using the free-vibration frequency method (EF and GF) were compared with the dynamic modulus of elasticity obtained using the Euler beam method (EE) and dynamic shear modulus obtained using the free-plate torsional vibration method (GT), respectively. It was found that the soundboards with different structures had different vibration modes and that excitation at different locations highlighted different vibration modes. For all the soundboards analyzed, the EE and GT were higher than EF and GF by 2.2% and 24.3%, respectively. However, the trends of the results of these methods were the same. The four piano soundboards with different structures possessed varying dynamic moduli of elasticity and dynamic shear moduli. These rules are consistent with the grain directions of the soundboards and the anisotropy of the wood (the direction of the units of the soundboards). The results show that the vibration mode of the piano soundboard is complex. The dynamic elastic modulus of the soundboard can be calculated using the Euler beam method. The results provide a reference for studies on the vibration response, material selection, production technology, and testing of piano soundboards.

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Liang, Shan-qing, and Feng Fu. "Comparative study on three dynamic modulus of elasticity and static modulus of elasticity for Lodgepole pine lumber." Journal of Forestry Research 18, no. 4 (2007): 309–12. http://dx.doi.org/10.1007/s11676-007-0062-4.

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Benmammar, M., and H. S. M. E. Boukli. "Influence of silica fume on the dynamic properties of concrete." Journal of Building Materials and Structures 5, no. 1 (2018): 102–9. https://doi.org/10.5281/zenodo.1297406.

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Ultrasonic pulse velocity and resonance frequency methods are non-destructive tests that allow the evaluation and control of building materials. They have been used to determine the dynamic properties of concrete, which are used in the design and control of structures and which are the key elements of the dynamics of materials. In this study, we chose a non-destructive approach to quantify -in laboratory-, the influence of adding “silica fume” on ordinary concrete’s dynamic characteristics. However, several concrete mixtures have been prepared with limestone aggregates. The experimental plan used, allowed us to determine the dynamic elasticity modulus and the dynamic rigidity modulus of different formulated concretes.

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Abbas Tiambo DATCHOSSA, Valéry Kouandété DOKO, and Emmanuel Essè Timothée OLODO. "Evaluation of the dynamic modulus of elasticity of a pozzolanic mortar of rice husk ash reinforced with sugarcane bagasse." World Journal of Advanced Research and Reviews 17, no. 2 (2023): 709–17. http://dx.doi.org/10.30574/wjarr.2023.17.2.0311.

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In the last decades, many works are going in the direction of valorization of vegetable biomass. The aim of the present work is to determine the dynamic modulus of elasticity of a cementitious matrix composite with rice husk ash pozzolan reinforced with sugarcane bagasse. To do this, we formulated mortars in which we varied the volume fraction of sugarcane bagasse and kept 10% of rice husk ash as a cement replacement. The sugarcane bagasse fractions of 0%, 3%, 6% and 10% yielded the mortars denoted RHA10, R10SB3, R10SB6, R10SB10, respectively. We have experimentally determined the density, the porosity of the different mortars obtained. Then, we determined by ultrasound test the speed of propagation of sound waves in the different mortars before calculating their dynamic moduli of elasticity. The results of the study show that the porosity, density, and dynamic modulus of elasticity of RHA10 mortars decreases with the increase of the volume fraction of sugarcane bagasse. The dynamic moduli of RHA10, R10SB3, R10SB6 and R10SB10 are 3.25GPa, 3.14GPa, 2.56GPa, 1.71GPa respectively with a porosity-dynamic modulus correlation R² of 0.94.

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Abbas, Tiambo DATCHOSSA, Kouandété DOKO Valéry, and Essè Timothée OLODO Emmanuel. "Evaluation of the dynamic modulus of elasticity of a pozzolanic mortar of rice husk ash reinforced with sugarcane bagasse." World Journal of Advanced Research and Reviews 17, no. 2 (2023): 709–17. https://doi.org/10.5281/zenodo.8109537.

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Olaoye, Kayode, Lawrence Aguda, and Bolade Ogunleye. "Prediction of Mechanical Properties of Hardwood Species Using the Longitudinal Vibration Acoustic Method." Forest Products Journal 71, no. 4 (2021): 391–400. http://dx.doi.org/10.13073/fpj-d-21-00048.

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Abstract Acoustic test methods such as longitudinal vibration have been developed to predict the elastic properties of wood. However, attention has not been shifted to using this method to predict other mechanical properties, especially on Nigeria's preferred, and lesser-used wood species. Thus, we further investigate relationships among mechanical and acoustic properties of selected hardwood species with a view of predicting the mechanical properties of wood from acoustic parameters. Clear wood samples (324) of 20 by 20 by 20 mm3 were collected axially from Albizia adianthifolia, Gmelina arborea, Delonix regia, and Boscia anguistifolia trees, and conditioned before testing. The longitudinal vibration method was adopted to test for the dynamic (acoustic) parameters and properties (fundamental frequency, damping factor, dynamic modulus of elasticity, sound velocity, specific elastic modulus, radiation coefficient, acoustic conversion efficiency, acoustic impedance) while the universal testing machine was used to test for the mechanical properties (static modulus of elasticity, modulus of rupture, maximum compression strength parallel to grain). The damping factor, dynamic modulus of elasticity, and acoustic impedance were the best acoustic parameters that significantly correlated with the static modulus of elasticity (−0.57, 0.81, 0.76), modulus of rupture −0.64, 0.82, 0.85) and maximum compression strength parallel to grain (−0.52, 0.78, 0.84), respectively. There was a significant difference in the mechanical properties with respect to species, thus A. adianthifolia and G. arborea were mechanically better than D. regia and B. anguistifolia for construction or structural purposes. This study revealed that additional new acoustic measures are suitable for inferring mechanical wood properties.

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Kocáb, Dalibor, Vlastimil Bílek Jr., Libor Topolář, Petr Daněk, Barbara Kucharczyková, and Petr Pőssl. "Influence of a Shrinkage-Reducing Admixture on the Damage to the Internal Structure of Alkali-Activated Composites during Testing of the Modulus of Elasticity." Solid State Phenomena 272 (February 2018): 28–33. http://dx.doi.org/10.4028/www.scientific.net/ssp.272.28.

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This article deals with an experimental determination of the static modulus of elasticity in compression on fine-grained composites based on alkali-activated slag. This experiment included an alkali-activated composite without a shrinkage-reducing admixture and the same composite with a shrinkage-reducing admixture. The test specimens were subjected to testing of the dynamic modulus of elasticity using the ultrasonic pulse velocity test and the resonance method as well as of the static modulus of elasticity in compression. The static modulus of elasticity test was accompanied by the measurement of the acoustic activity of the material using the acoustic emission method, whose advantages is the possibility to detect early formation and propagation of cracks in the internal structure of the material. The output of the described experiment is a detailed evaluation of the differences in the behaviour of the tested alkali-activated composites based on the observed values of the modulus of elasticity and the recorded acoustic activity of the material during loading.

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Wang, Jianxiang, Xinjun Tang, Qin Wu, and Chuanxiang Chen. "Research on Multiple-Factor Dynamic Constitutive Model of Poured Asphalt Concrete." Materials 17, no. 15 (2024): 3804. http://dx.doi.org/10.3390/ma17153804.

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This study conducted dynamic triaxial tests on a typical poured asphalt concrete material of core walls in Xinjiang, exploring the dynamic characteristics of poured asphalt concrete under various confining pressures, principal stress ratios, and vibration frequencies. On this basis, the dynamic constitutive relationship of poured asphalt concrete was investigated using the Hardin–Drnevich model. The results indicate that under different confining pressures, principal stress ratios, and vibration frequencies, the variation patterns of the backbone lines of dynamic stress-strain of poured asphalt concrete are basically identical, consistent with a hyperbolic curve. The confining pressure and principal stress ratio significantly affect the backbone line of dynamic stress-strain. By comparison, frequency has a minimal effect. The changing trends of dynamic elasticity modulus and damping ratio of poured asphalt concrete under various factors are almost the same. When the material has high dynamic stress and strain, the hysteresis loop is large. When the curve of the damping ratio becomes flat, the asymptotic constant can be used as the maximum damping ratio. The relationship between the reciprocal of the dynamic elasticity modulus and the dynamic strain of poured asphalt concrete exhibits a linear distribution. Under different ratios of confining pressure to principal stress, there are large discrepancies between the calculated values from the formula and the experimental fitting values of the maximum dynamic elasticity modulus, and the maximum relative errors reach 16.65% and 18.15%, respectively. Therefore, the expression for the maximum dynamic elasticity modulus was modified, and the calculated values using the modified formula were compared with the experimental fitting values. The relative errors are significantly reduced, and the maximum relative errors are 3.02% and 2.04%, respectively, in good agreement with the fitting values of the experimental data. The findings of this article render a theoretical basis and reference for the promotion and application of poured asphalt concrete.

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Brunetti, Michele, Giovanni Aminti, C. Brand Wessels, and Michela Nocetti. "Mixed Visual and Machine Grading to Select Eucalyptus grandis Poles into High-Strength Classes." Forests 12, no. 12 (2021): 1804. http://dx.doi.org/10.3390/f12121804.

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Before round timber can be profitably used in construction, it needs structural characterization. The visual grading of Eucalyptus grandis poles was integrated with additional parameters developed by multivariate regression analysis. Acoustic velocity and dynamic modulus of elasticity were combined with density and pole diameter in the estimation of bending strength and stiffness. The best models achieved were used to group the visually graded material into qualitative structural classes. Overall, dynamic modulus of elasticity was the best single predictor; and adding density and diameter to the model improved the estimation of strength but not of stiffness. The developed parameters separated the material into two classes with very distinct mechanical properties. The models including velocity as a parameter did not perform as well. The strength grading of Eucalyptus grandis poles can be effectively improved by combining visual parameters and nondestructive measurements. The determination of the dynamic modulus of elasticity as a grading parameter should be preferred over that of acoustic velocity.

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HORVÁTH, DÉNES, SÁNDOR FEHÉR, and MÁTYÁS BÁDER. "THE POTENTIAL OF PRODUCING HIGH ADDED VALUE STRUCTURAL TIMBER FROM LAMELLAE WASTE. TEST RESULTS AND ANALYSIS." WOOD RESEARCH 68(1) 2023 68, no. 1 (2023): 44–57. http://dx.doi.org/10.37763/wr.1336-4561/68.1.4457.

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The research was based on the analysis of the density, bending strength and modulus of elasticity of 100 oak lamellae generated as small-sized production waste. In this part of thestudy series, the test results were presented in detail and analysed, in particularly the density distribution. Correlations between some test results have been shown. The dynamic and static test results were also compared. Despite the poor quality lamellae, the average density of the sample set corresponds to literary values and the distribution of density is normal. Specimens with low density are unsuitable for further use. But the density alone cannot be used for classification. Between static and dynamic modulus of elasticity can be found a good relationship. The relationships between density and both static and dynamic modulus of elasticity of the specimens can be considered as good, too. The best correlation is in bending tests between the deflection of the specimens in the elastic range and the bending strength.

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Kocab, Dalibor, Romana Halamová, and Barbara Kucharczyková. "Determination of the static modulus of elasticity of cement mortars in the early stage of ageing." MATEC Web of Conferences 310 (2020): 00029. http://dx.doi.org/10.1051/matecconf/202031000029.

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The paper deals with the influence of the composition of cementitious materials on the development of their modulus of elasticity in the early stage of ageing. The primary goal of the paper is to determine the static modulus of elasticity of cement mortars almost from the beginning of their setting. Four cement mortars were produced for the experiment. They differed only in the water/cement ratio and in the amount of plasticizer. All mortars were subjected to continuous measurement of the dynamic modulus of elasticity for 24 hours from the moment of their pouring into the moulds. The measurement involved the ultrasonic pulse velocity method. In addition, the static modulus of elasticity was determined at the mortar age of 24 hours. The results are presented in table and graphical forms.

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Ďureje, Jakub, and Zdeněk Prošek. "CEMENT PASTE CONTAINING MICRONIZED RECYCLED CONCRETE - INFLUENCE OF HARDENING ACCELERATORS ON THE MODULUS OF ELASTICITY." Acta Polytechnica CTU Proceedings 26 (March 17, 2020): 19–23. http://dx.doi.org/10.14311/app.2020.26.0019.

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The article deals with the selection of a suitable hardening accelerator for cement composite material for mass production of masonry blocks. The blocks contain cement and finely ground recycled concrete in ratio 1:1. Three different hardening accelerators in different quantity were tested for possibility of fast removing formwork. The dynamic modulus of elasticity was measured by non-destructive resonance method to determine the initial strengths. The modulus of elasticity was measured 7 and 12 hours after sample production to determine the increase in initial strength. Subsequently, the modulus of elasticity was measured at 1, 7, 14, 21 and 28 days after production of the test specimens. The resulting moduli of elasticity were compared with reference samples.

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Khalil, Wasan I., Waleed A. Abbas, and Ibtesam F. Nasser. "Dynamic modulus of elasticity of geopolymer lightweight aggregate concrete." IOP Conference Series: Materials Science and Engineering 518 (June 5, 2019): 022023. http://dx.doi.org/10.1088/1757-899x/518/2/022023.

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Marques, Ana Isabel, João Morais, Paulo Morais, et al. "Modulus of elasticity of mortars: Static and dynamic analyses." Construction and Building Materials 232 (January 2020): 117216. http://dx.doi.org/10.1016/j.conbuildmat.2019.117216.

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Zarifzoda, A. Q., and Yu K. Bozorova. "On the dependence of the thermal module of elasticity of a two-component magnetic fluid on frequency, concentration and magnetic field." Proceedings of the Southwest State University. Series: Engineering and Technology 14, no. 3 (2024): 40–51. http://dx.doi.org/10.21869/2223-1528-2024-14-3-40-51.

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Purpose. Study of the dependence of the thermal modulus of elasticity of a two-component magnetic fluid on the magnitude of the magnetic field strength, the frequency of external disturbance and the volumetric concentration of magnetic particles.Method. The research method is based on the kinetic theory of liquid systems. Based on previously constructed kinetic equations for one-particle and two-particle distribution functions and a microscopic expression for the heat flux vector, an explicit dynamic expression for the thermal modulus of elasticity of magnetic fluids is obtained. In fast processes in liquids, heat transfer occurs in waves and their propagation is similar to the propagation of second sound in helium II. The thermal modulus of elasticity in liquids appears at high frequencies and ensures the propagation of second sound. The expression for the thermal modulus of elasticity consists of potential and kinetic parts, taking into account structural and translational relaxation processes, respectively. To study the thermoelastic properties of magnetic fluids, appropriate expressions of potential interaction energies were selected for each subsystem, allowing for numerical calculations.Results. Numerical calculations of the frequency and concentration dependence of the dynamic thermal modulus of elasticity in the presence of an external magnetic field in a kerosene-based magnetic fluid were carried out. The calculation results show that an increase in the influence of external disturbances leads to a nonlinear increase in the thermal modulus of elasticity in the magnetic fluid. An increase in the volume concentration of magnetic particles and an increase in the magnetic field strength also led to a nonlinear increase in the thermal modulus of elasticity in the magnetic fluid.Conclusion. It has been established that, due to taking into account translational and structural relaxation processes, the region of frequency dispersion of the thermal elastic modulus is wide. Numerical calculations carried out at different values of the external magnetic field and the volume concentration of magnetic particles showed that although an increase in the magnetic field and concentration of magnetic particles leads to an increase in the thermal modulus of elasticity, their increase does not affect the change in the frequency dispersion region.

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Domagała, Lucyna, and Kinga Sieja. "Effect of Moisture Condition of Structural Lightweight Concretes on Specified Values of Static and Dynamic Modulus of Elasticity." Materials 16, no. 12 (2023): 4299. http://dx.doi.org/10.3390/ma16124299.

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The dynamic modulus of elasticity (Ed), specified by ultrasonic pulse velocity measurements, is often used, especially for concrete built into construction, to estimate the static modulus of elasticity (Ec,s). However, the most commonly used Equations for such estimations do not take into account the influence of concrete moisture. The aim of this paper was to establish this influence for two series of structural lightweight aggregate concrete (LWAC) varying in their strength (40.2 and 54.3 MPa) and density (1690 and 1780 kg/m3). The effect of LWAC moisture content turned out to be much more pronounced in the case of dynamic modulus measurements than for static ones. The achieved results indicate that the moisture content of the concrete should be taken into consideration in modulus measurements as well as in Equations estimating Ec,s on the basis of Ed specified by the ultrasonic pulse velocity method. The static modulus of LWACs was lower on average by 11 and 24% in relation to dynamic modulus, respectively when measured in air-dried and water-saturated conditions. The influence of LWAC moisture content on the relationship between specified static and dynamic moduli was not affected by the type of tested lightweight concrete.

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Benmammar, Mohammed, and Hacene Sidi Mohammed El Amine Boukli. "Influence of silica fume on the dynamic properties of concrete." Journal of Building Materials and Structures 5, no. 1 (2018): 102–9. http://dx.doi.org/10.34118/jbms.v5i1.49.

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Ultrasonic pulse velocity and resonance frequency methods are non-destructive tests that allow the evaluation and control of building materials. They have been used to determine the dynamic properties of concrete, which are used in the design and control of structures and which are the key elements of the dynamics of materials. In this study, we chose a non-destructive approach to quantify -in laboratory- the influence of adding silica fume on ordinary concrete’s dynamic characteristics. However, several concrete mixtures have been prepared with limestone aggregates. The experimental plan used, allowed us to determine the dynamic elasticity modulus and the dynamic rigidity modulus of different formulated concretes.

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Chang, Jiang, Xue Gong, and Zhi Hui Sun. "Study on Regeneration Pre-Sensitized Offset Plate Based on the Nondestructive Testing Method." Advanced Materials Research 380 (November 2011): 348–51. http://dx.doi.org/10.4028/www.scientific.net/amr.380.348.

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In this paper the vibration testing and Fast Fourier Transform(FFT) analysis detection on the basis of nondestructive testing method were analyzed. The dynamic Young’s modulus of the regeneration pre-sensitized offset plate were obtained by using the nondestructive testing methods, including the dynamic Young’s modulus by longitudinal vibration method, the dynamic Young’s modulus by out-plane flexural vibration method, and the dynamic Young’s modulus by in-plane flexural vibration method. The linear correlativity was investigated between the dynamic Young’s modulus and the modulus of elasticity(MOE) for the regeneration pre-sensitized offset plate.The linear correlations between the dynamic Young’s modulus and the MOE were good. So it is feasible to predict and analyze the plate mechanical properties put forward the nondestructive testing method of key mechanical performance parameters.

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Purwanto, Amanda, and Abdul Ro’uf. "Sistem Pengukuran Modulus Elastisitas Beton Menggunakan Metode Ultrasonic Pulse Velocity." IJEIS (Indonesian Journal of Electronics and Instrumentation Systems) 8, no. 1 (2018): 25. http://dx.doi.org/10.22146/ijeis.30978.

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Modulus of elasticity of concrete usually measured by Destructive Testing which is not considered as an effective way, because It will destroy the concrete. Ultrasonic Pulse Velocity can be a solution to measure value of modulus of elasticity without destructing it. The concept of the system is to look for velocity of wave, then put the value into modulus elasticity formula.UPV system will transmit ultrasonic wave through concrete. HC-SR04 used for generating 40 kHz wave, increasing voltage of wave on receiver, and calculating time travel. The voltage of wave sent by HC-SR04 is only about 10 volt, so that power and voltage of wave has to be amplified. Piezoelectric is used as a transducer which can converts electrical to mechanical energy. The results of this research shows that error value on wave velocity measurement have an average value for about 18,2% compared to result of UPV Pundit. Static modulus of elasticity from compressive test is compared to value of dynamic modulus of elasticity that is obtained by UPV system with HC-SR04. Ratio between two values is about 45% - 249%.

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