Journal articles: 'Compressive properties'

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Lv, Qing Fang, Ji Hong Qin, and Ran Zhu. "Size Effect on Mechanical Properties of LVL." Advanced Materials Research 887-888 (February 2014): 824–29. http://dx.doi.org/10.4028/www.scientific.net/amr.887-888.824.

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Laminated veneer lumber is taken as an object of study, and use LVL specimens of different sizes for compression test and tensile test. The goal of the experiment is to investigate the size effect on compressive strength and tensile strength as well as the influence of the secondary glued laminated face, which appears in the secondary molding processes. The results show that both compressive strength and tensile strength have the size effect apparently and the existence of the secondary glued laminated face lower the compressive strength of LVL specimens. Afterwards, the relationship between compressive strength and volume along with tensile strength and area are obtained by the test results.

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Su, Yi Ming, Ying Hou, and Guang Ping Zou. "Research on Compression Mechanical Properties of Metal-Net Rubber." Applied Mechanics and Materials 858 (November 2016): 179–83. http://dx.doi.org/10.4028/www.scientific.net/amm.858.179.

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For the study of the metal-rubber which is a new material used as damper component. The compression mechanical properties of metal-net rubber were studied. Through the static compression test of metal-net rubber, the influence of some factors such as: compression amount, relative density, wire diameter and bearing area. The method is variable-controlling. Experimental results show that along with the increase of the amount of compression, the nonlinear mechanical properties of metal-net rubber boosts; with the increase of relative density, the compressive capacity of metal-net rubber improves. The wire diameter influences the nonlinear mechanical properties of metal-net rubber, the larger the wire diameter, the compressive capacity is higher; the bearing area is greater, the compressive capacity and energy dissipation performance are better.

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Ma, Yong Sheng, Cheng Sun, Xin Ni Mu, and Xin Li. "The Simulation Research of In-Plane Static Compression Properties of Honeycomb Paperboard Based on FEA." Advanced Materials Research 631-632 (January 2013): 1061–67. http://dx.doi.org/10.4028/www.scientific.net/amr.631-632.1061.

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The in-plane mechanical properties of honeycomb paperboard were analyzed and simulated by ANSYS software with finite element analysis method. This paper also explored and optimized finite element modeling method of honeycomb paperboard structure and obtained the equivalent stress distribution maps of honeycomb paperboard in different displacement loads. The mechanical properties and deformation mode of the honeycomb paperboard in the in-plane compression conditions were also analyzed. The results show that longitudinal compressive strength is greater than the lateral compressive strength. The compression deformation mode is different when compressing but appears with the same four stages. The results of finite element analysis have good equivalence with the experimental ones. This paper also revealed the honeycomb paperboard in-plane mechanical properties, deformation and destruction mechanism, further extended the research scope of honeycomb paperboard, and promoted the application of finite element method in the analysis of honeycomb paperboard.

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Zhang, Xiaohui, Chao Zhang, and Pibo Ma. "Mechanical properties of hollow polyester monofilament: Compression and tension behaviors." Journal of Engineered Fibers and Fabrics 14 (January 2019): 155892501983753. http://dx.doi.org/10.1177/1558925019837537.

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Comparative analysis has been performed on the mechanical properties of hollow and solid polyester monofilament with identical external diameter. Tensile test of hollow polyester monofilament was conducted to study the influence of hollow core and the manufacturing method on the tensile fracture mechanism of hollow monofilament. The compressive properties of hollow monofilament were determined to provide a bundle-compression method to study the behavior of hollow polyester monofilament under axial compressive loading and compare with solid one. The results show that the tensile property of the hollow monofilament has smaller breaking force and higher breaking elongation than solid monofilament in case of identical external diameter. Under compression loading, the solid monofilament show better compressive properties than hollow one with identical diameter. The hollow core only affects the values of compressive strain and stress, but it has no effect on the compression and deformation mechanism. The study results also show that the polyester monofilament can show better mechanical properties than the solid polyester monofilament for the same weight. This study can help to design the lighter textile materials with the hollow polyester monofilament.

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Huo, Fu Lei, Guo Li Zhang, Jia Lu Li, Guang Wei Chen, and Li Chen. "Study on the Compression Properties of Epoxy Matrix Composites Reinforced by PES Warp-Knitted Spacer Fabric." Advanced Materials Research 217-218 (March 2011): 1208–11. http://dx.doi.org/10.4028/www.scientific.net/amr.217-218.1208.

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This research paper presents an experimental investigation on the compression and compressive resilience properties of warp-knitted spacer fabric composites with different resin content and different kinds of resin. By means of hand roller coating technology, four kinds of warp-knitted spacer fabric composites were made. The experiments were tested according to GB/T1453-2005 and ISO3386/2:1984. It is shown that the resin content and resin type seriously affect the compression and compressive resilience properties of warp-knitted spacer fabric composite. The data indicated that when the warp-knitted spacer fabric composite coated with the same kind of resin, with increasing resin content the elastic modulus added and the compressive resilience decreased. Having the same resin content, the compression properties of pacer fabric composite increase with the increase of flexural strength of resin; while the compressive resilience decrease.

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Fartini, M. S., M. S. Abdul Majid, Mohd Afendi, R. Daud, and Azizul Mohamad. "Effect of Nano-Clay and their Dispersion Techniques on Compressive Properties of Unsaturated Polyester Resin." Applied Mechanics and Materials 554 (June 2014): 27–31. http://dx.doi.org/10.4028/www.scientific.net/amm.554.27.

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This paper aims to understand the relationship between processing parameters and compressive properties of nanoclay filled polyester resin (dispersion method and wt% of nanoclay particles). Unsaturated polyester resin with 0-5 wt% nanoclay content was prepared by hand mixing and through shears mixing of water bath shaker. Static uniaxial compression tests were conducted to investigate how the unsaturated polyester resins with nanoclay contents and processing will effect on the compressive stress-strain behaviour and compression properties. The experimental results show that the compressive strength and elastic modulus of nanomodified resin are significantly affected by type of mixing methods to prepare the specimens and the ratio of nanoparticles content during mixing. It was found out that the compressive strength and compressive modulus increase with the nanoclay content. The findings also indicate the dispersion of nanoclay by hand-mixed method yield higher compressive strength compared to that dispersed by water shaker bath.

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Wang, Dong Mei. "Compressive Constitutive Relation for Multi-Layer Corrugated Boards." Applied Mechanics and Materials 80-81 (July 2011): 365–69. http://dx.doi.org/10.4028/www.scientific.net/amm.80-81.365.

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The investigation into the cushioning properties of multi-layer corrugated boards is a hotspot issue in the packaging field. People one after another investigate into the compressive properties based on experiments. As far as authors' knowledge is concerned, no theoretical research on compressive constitutive relation for multi-layer corrugated boards has ever been reported in literature. Therefore, we investigated into the compressive properties of multi-layer corrugated boards and analyzed their compressive breakage mechanism. The compression curve of multi-layer corrugated boards presents the three sections of linear elasticity, sub-buckling going with local collapse and densification. We constructed the compressive constitutive equation by a subsection function. The equation is standardized by the solid modulus Es of corrugated sandwich materials. Focusing on the structure characteristics, it can express the compression resistance and cushioning properties in the same curve for different basis materials. Comparison between the theory and experiments shows that a good consistency is achieved between theoretical and experimental stress-strain curves. By means of the compressive constitutive equation, the compression resistance and cushioning properties can be evaluated without more experiments, which facilitates the optimization of the structure of the corrugated sandwich structure and the optimized design of the cushioning package.

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Sun, Ji Shu, Li Jie Ma, Yuan Ming Dou, and Ji Zhou. "Effect of Strain Rate on the Compressive Mechanical Properties of Concrete." Advanced Materials Research 450-451 (January 2012): 244–47. http://dx.doi.org/10.4028/www.scientific.net/amr.450-451.244.

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Concrete is one of the most widely used construction material throughout the world. But the properties of concrete under different strain rates differ from each other greatly. In order to investigate the effect of strain rate on concrete compressive mechanical properties, compressive experiments of concrete specimens (C35) are carried out on MTS, with the uniaxial strain rates ranging from 10-5/s to 10-2/s. The compressive mechanical properties of concrete under different stain rates, which include compressive strength, elastic modulus, peak strain and Poisson's ratio are studied systematically. The formulas which can describe the change laws of the compressive properties of concrete under different the strain rates are proposed. The test results show that the compresseive strength and elastic modulus of concrete would increase with the strain rate increasing. The effect of strain rate on peak strain and and Poisson's ratio is not significant. These research achievements can contribute to grasp the dynamic properties and build the dynamic constitutive models of concrete.

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Yao, Jia Wei, Yu Pu Song, Li Kun Qin, and Ling Xia Gao. "Mechanical Properties and Failure Criteria of Concrete under Biaxial Tension and Compression." Advanced Materials Research 261-263 (May 2011): 252–55. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.252.

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Utilizing the large static-dynamic triaxial test system, 7 proportional loading biaxial tensile and compressive tests of concrete were conducted. The proportional loading paths are 0 (uniaxial compression), -0.05, -0.1, -0.15, -0.2, -0.25 and ∞ (uniaxial tension). Compressive and tensile strength were measured as well as the strains at two loading directions. Considering the ratio to tension and compression, failure criteria of ordinary concrete under biaxial tension and compression was established, which has a good agreement with test value.

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Jumahat, A., C. Soutis, F. R. Jones, and A. Hodzic. "Improved Compressive Properties of a Unidirectional Cfrp Laminate Using Nanosilica Particles." Advanced Composites Letters 19, no. 6 (November 2010): 096369351001900. http://dx.doi.org/10.1177/096369351001900604.

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The effect of nanosilica particles on the compressive properties of a unidirectional (UD) HTS40/828 carbon fibre reinforced polymer (CFRP) composite was studied. A series of nanomodified CFRP composite was fabricated using 3.6-19.7 vol.% nanosilica-modified epoxy resin. Static uniaxial compression tests were conducted on [0]8 laminate specimens of 12 mm gauge length to evaluate the compressive properties. It was found that the compressive modulus and strength of nanomodified UD system were improved with increasing nanosilica content without any significant reduction in failure strain. The presence of spherical silica nanoparticles stiffened the epoxy matrix and offered a better lateral support to the carbon fibre. Therefore, the compressive properties were improved significantly in comparison with the unmodified CFRP system. These results suggested that the interaction between the nanomodified epoxy and the carbon fibre is very good therefore the load is successfully transferred via the interface to give higher resistance against deformation when it was loaded in compression.

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Kažimírová, Viera, Ľubomír Kubík, and Štefan Mihina. "Evaluation of Properties of Pellets Made of Swine Manure." Acta Technologica Agriculturae 23, no. 3 (September 1, 2020): 137–43. http://dx.doi.org/10.2478/ata-2020-0022.

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AbstractThis paper deals with assessment of density, moisture content and mechanical properties of pellets made of dry swine manure utilizing pellet production line MGL 200. Pellets were subsequently subjected to compressive loading test. Furthermore, the values obtained were measured by means of device Andilog Stentor 1000 and compression diagrams were plotted. In terms of compressive strength, pellet type 1 showed value of 10.47 MPa; pellet type 2 showed value of 6.24 MPa. Considering the elasticity modulus, pellet type 1 showed value of 122.39 MPa; pellet type 2 showed value of 71.12 MPa. Other observed properties included force necessary for 10% compression strain; force in the first maximum of force-strain curve; force in the inflection point of the force-time curve. Results obtained from compressive loading test provide a basis for innovations in pellet production utilizing materials other than wood biomass.

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Hakamada, Masataka, Yuuki Asao, Tetsumune Kuromura, Yasuo Yamada, Y. Chen, Hiromu Kusuda, and Mamoru Mabuchi. "Compressive Properties of Porous Metals with Homogeneous Pore Characteristics." Key Engineering Materials 340-341 (June 2007): 415–20. http://dx.doi.org/10.4028/www.scientific.net/kem.340-341.415.

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Spacer method is excellent technique of processing porous metals with well-controlled pore characteristics such as porosity (up to 90%) and pore size (as small as several hundred micrometers). Compressive properties of porous aluminum fabricated by the spacer method are investigated. They were subjected to monotonic compression tests at room temperature, and showed less fluctuated flow stress during their compressive deformation than conventional porous aluminum alloy, reflecting their homogeneous pore characteristics. Also, shortening behavior of the porous aluminum fabricated by the spacer method during cyclic compression was significantly differed from that of conventional porous aluminum alloy. Therefore, it can be concluded that the homogeneity of pore characteristics is responsible for compressive properties of porous metals. Monotonic compression tests on porous copper specimens with various porosities, which were made by the spacer method, were also conducted. The yield stress of the porous copper with high porosity (or low relative density) depended on the relative density more strongly than that of the porous copper with low porosity (or high relative density). It is presumed that porous metals with high porosity and ones with low porosities have different deformation mechanisms.

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Zhang, Hao, Yi Gao, and Chang Hong Huang. "Analysis of Mechanical Properties of Fiber Reinforced Polymer Mortar." Materials Science Forum 1001 (July 2020): 47–52. http://dx.doi.org/10.4028/www.scientific.net/msf.1001.47.

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It is studied that effects of different amounts of steel fiber and glass fiber on the compressive strength, flexural strength, and compression ratio and bond strength of styrene-acrylic emulsion modified mortar under different ages. The results show that the compressive strength, flexural strength and bond strength of mortar increase with the increase of steel fiber content, and the toughness improvement effect is obvious. With the increase of glass fiber content, mortar compressive strength, flexural strength and bond strength first increases and then decreases. Combined with SEM analysis and theoretical calculation to analyze the mechanical strength mechanism of fiber reinforced polymer mortar.

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Liu, Fang, Shiqiang Deng, and Jianing Zhang. "Mechanical Properties of Epoxy and Its Carbon Fiber Composites Modified by Nanoparticles." Journal of Nanomaterials 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/8146248.

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Compressive properties are commonly weak parts in structural application of fiber composites. Matrix modification may provide an effective way to improve compressive performance of the composites. In this work, the compressive property of epoxies (usually as matrices of fiber composites) modified by different types of nanoparticles was firstly investigated for the following study on the compressive property of carbon fiber reinforced epoxy composites. Carbon fiber/epoxy composites were fabricated by vacuum assisted resin infusion molding (VARIM) technique using stitched unidirectional carbon fabrics, with the matrices modified with nanosilica, halloysite, and liquid rubber. Testing results showed that the effect of different particle contents on the compressive property of fiber/epoxy composites was more obvious than that in epoxies. Both the compressive and flexural results showed that rigid nanoparticles (nanosilica and halloysite) have evident strengthening effects on the compression and flexural responses of the carbon fiber composite laminates fabricated from fabrics.

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Ruan, Fangtao, Zhenzhen Xu, Dayin Hou, Yang Li, and Changliu Chu. "Enhancing Longitudinal Compressive Properties of Unidirectional FRP Based on Microbuckling Compression Failure Mechanism." Journal of Engineered Fibers and Fabrics 13, no. 1 (March 2018): 155892501801300. http://dx.doi.org/10.1177/155892501801300110.

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In this study, a new methodology to improve the longitudinal compressive strength and modulus of ultra-high molecular weight polyethylene (UHMWPE) fiber-reinforced epoxy resin matrix is developed. The proposed method involves wrapping a UHMWPE fiber bundle with a poly-p-phenylene benzobisoxazole fiber filament using a winding method, and using these bundles to fabricate unidirectional UHMWPE fabric. UHMWPE/epoxy composites were fabricated using vacuum-assisted resin-transfer molding (VARTM), and the compression properties of the composite were evaluated and compared to investigate the effect of the filament wrapping. Improvements in the compressive modulus were achieved for filaments wound with applied tension, and when increasing the filament-winding spacing; however, the compressive strength decreased with an increase in the filament-winding spacing. Results obtained confirm that fiber microbuckling failure occurred in the composite under longitudinal compression, and that inhibiting the buckling length of the fiber improved compressive properties. These results may be useful when designing the mechanical properties of fiber-reinforced polymer composites.

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Kubík, Ľ., and V. Kažimírová. "Mechanical properties of pellets in compression." Research in Agricultural Engineering 61, Special Issue (June 2, 2016): S1—S8. http://dx.doi.org/10.17221/17/2015-rae.

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The paper deals with the evaluation of mechanical properties of the cylinder pellet samples. The pellets were made from hay by the granulating machine MGL 200 (Kovonovak) provided by the Department of Production Engineering, Slovak University of Agriculture in Nitra. The pellets were submitted to compressive loading. The compressive loading curves of dependencies of force on strain and force on time were realised by the test stand Andilog Stentor 1000. Certain mechanical parameters were determined, namely the diameter of the sample, length of the sample, force at 10% of strain, force in the first maximum of the force – strain curve, strain in the first maximum of the force – strain curve, modulus of elasticity, force in the inflex point of the force – time and force – strain curves and strain and stress in the inflex point of the force – time and force – strain curves. Significant correlations of the mechanical parameters were observed between the inflex point and the first maximum point of the loading curves. There were find out, the compression force, stress and strain in the inflex point significantly correlate with the force, stress and strain in the first maximum.

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Wang, Zhan Guang, Ping Cai, and Zhen Wu Wang. "New Type Spherical Pores Al Foam and its Properties." Advanced Materials Research 250-253 (May 2011): 584–87. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.584.

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Based on compression curves of spherical pores Al foam measured, compressive yield strength, the densification starting pointand energy absorption had been investigated. The compressive stress-strain curve of spherical pores Al foam consists of three distinct regions, i.e., the linear elasticity region, yield platform stage and the densification region. The way to determine the densification starting pointεDof high density metal foam has been presented. Spherical pores Al foam is a cellular metal material of high plastic performance, so energy absorption capability of it is bigger than that of spherical pores Al alloy foam. Compressive yield stress was in good agreement with Gibson-Ashby model’s expectation．

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Yang, Hong Xia. "Experimental Study on Engineering Geological Properties of Sandstone." Applied Mechanics and Materials 256-259 (December 2012): 324–27. http://dx.doi.org/10.4028/www.scientific.net/amm.256-259.324.

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Based on field survey sampling and indoor test of four big quarry rock in Wulumuqi, rock's engineering geological properties is system analyzed. Investigation and test results show that there is mainly sedimentary sandstone in the area, the composition of the substance is mainly debris, feldspar and quartz.Debris content of 60% or more, feldspar and quartz content of about 30%, cementing material is mainly made up of argillaceous and carbonate class whose ratio is about 10%. The compressive strength is higher in the natural state, the general in between 30 MPa-90MPa. In different moisture content state the compression strength are very different.Compared saturated state to dry state, the compressive strength reduced by about 40%. Tensile strength, flexural strength, shear strength and elastic modulus increase with increase of compressive strength. The same kind of rock in the same moisture content which tensile strength is only the 1/15-1/25 of the compressive strength, the flexural strength is the 1/4-1/7 of the compressive strength. Sandstone frost resistance is better, after 25 times the freeze-thaw cycle test, its strength is lower slightly and quality is not damaged.

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Hu, You Chang, Jun Min Shen, Guang Dou Gu, and Hua Nan Cai. "Compressive Properties of Crushed Stone-Loess Reinforced with Geogrid." Applied Mechanics and Materials 353-356 (August 2013): 589–92. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.589.

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In order to study the mechanical properties of Crushed Stone-Loess (CSL), a mixture of loess and crushed stone, and Geogrid-reinforced CSL (GCSL), a series of unconfined compression tests were conducted using samples prepared respectively with CSL, GCSL, Pure Loess (PL) or Geogrid-reinforced PL (GPL). Samples varied either in the number of geogrid-reinforcement layers or in the relative compaction / in the content of crushed stone. Based on the analysis of the test results, the following conclusions are given: (1) The pattern of compressive stress-strain curves of GCSL changes gradually from obvious strain softening to strain hardening with the increase of the geogrid-reinforcement layers and the relative compaction. (2) While the compressive strain is greater than a certain value, the compressive strength of GCSL increases significantly with the increase of crushed stone content. (3) Under a larger compressive strain, the crushed stone inclusions improve apparently the compressive property of GCSL with closely spaced geogrid-reinforcement layers due to the interlocking between the crushed stone and the geogrid.

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Nampitch, Tarinee, Thiti Kaisone, Pran Hanthanon, and Chanon Wiphanurat. "Compressive Properties of Polylactic Acid-Based Nanocomposite Foams Reinforced with Coconut Fibers." Applied Mechanics and Materials 851 (August 2016): 19–25. http://dx.doi.org/10.4028/www.scientific.net/amm.851.19.

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The investigation focused on the properties of composite foam obtained by a compression molding method. The results could clarify the interaction among PLA, silica nanoparticles and coconut fiber. The compressive properties, including the compressive force and modulus of composites, contained in coconut fiber were improved. The incorporation of silica nanoparticles was able to modify the compressive properties slightly, whereas the thermal properties were decreased explicitly. Hydrogen bonding between the carboxylic group of PLA and the silica bonded group affected the increment in mechanical properties of composites. However, the incorporation of coconut fibers in composites exhibited a rougher surface. In addition, beneficial distribution of silica nanoparticles and porosity in the nanocomposite foam, equivalent to neat PLA foam, could be obtained.

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Wang, Chen, and Wentao Li. "Factors Affecting the Mechanical Properties of Cement-Mixed Gravel." Advances in Materials Science and Engineering 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/8760325.

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A study has been conducted to investigate the mechanical properties of cement-mixed gravel using the unconfined compression test and the tensile test. Basic factors including the curing period, the water-binder ratio, the cement content, and the strain rate were evaluated. Ordinary Portland cement with fly ash was employed as the cementation agent for preparing cemented samples. The results indicate that the unconfined compressive strength, the deformation modulus, and the tensile strength increase with the increase in the curing period. The ratio of tensile strength to unconfined compressive strength has no distinct change after 7 days. An optimum water-binder ratio can be obtained. The unconfined compressive strength and deformation modulus decrease as the water-binder ratio decreases and increase from the optimum water-binder ratio. With the increasing of the cement content, the unconfined compressive strength increases distinctly, the deformation modulus increases significantly when the cement content is less than 4% and then increased slowly, and the failure strain increases to a peak value and then decreases. With the increasing of the strain rate, the unconfined compressive strength increases slightly and the deformation modulus increases slowly. The failure strain decreases with an increase in the strain rate.

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Zhang, Wei. "Research on Compressive Properties of Sea Sand Concrete." Advanced Materials Research 881-883 (January 2014): 1221–24. http://dx.doi.org/10.4028/www.scientific.net/amr.881-883.1221.

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The chloride ion concentration of sea sand were measured by Volhard method and identified the method of removal chloride ions in sea sand. By comparison of compression test for sea sand concrete and river sand concrete ,two compressive strength performance is basically the same , Verify the feasibility of the concrete of the treated sea sand for bluiding.

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Feng, Wei, Wanfu Zhou, Zhaohe Dai, Akram Yasin, and Haiyang Yang. "Tough polypseudorotaxane supramolecular hydrogels with dual-responsive shape memory properties." Journal of Materials Chemistry B 4, no. 11 (2016): 1924–31. http://dx.doi.org/10.1039/c5tb02737c.

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Dimassi, Mohamed Adli, Christian Brauner, Oliver Focke, and Axel Siegfried Herrmann. "Experimental investigation of Tied Foam Core sandwich compression performance." Journal of Sandwich Structures & Materials 22, no. 2 (December 27, 2017): 349–69. http://dx.doi.org/10.1177/1099636217748577.

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Carbon and glass dry fibre bundles were inserted into a ROHACELL® 71HERO polymethacrylimide foam core under a specific inclination angle and pin pattern in order to enhance the compressive strength and stiffness of the core material. Flatwise compression tests were conducted on pin-reinforced sandwich specimens and unreinforced sandwich to investigate the effect of pin volume fraction and pin material on the compressive mechanical properties and energy absorption characteristics. X-ray computed tomography was performed on tested specimens to investigate the failure modes under compressive loads. It was concluded that the compressive strength is mainly controlled by pin failure due to bending and compression loads at pin base. Moreover, increasing the pin volume fraction improved the compressive properties of the sandwich but using glass fibre pins instead of carbon fibre pins led to a higher increase of the absorbed crushing energy. Finally, an existing analytical model to predict the compressive strength and stiffness has been tested and evaluated.

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Peixinho, Nuno, Paulo Pinto, Filipe Silva, and Delfim Soares. "Quasi-Static Compressive Properties of Aluminium Foams with Functionally Graded Properties." Advanced Materials Research 1016 (August 2014): 115–18. http://dx.doi.org/10.4028/www.scientific.net/amr.1016.115.

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This paper presents experimental results of compressive behavior of aluminium alloy metal foams with controlled pore morphology. Different types of metal foams were analyzed, having uniform cell structure with different pore size and gradient variation of cellular structure along length. The test samples were manufactured by lost-wax casting using 3D printed components for internal structure definition. Results for stiffness and energy absorption were obtained and compared on weight efficiency basis. The results are analyzed regarding the efficiency of the different cell structures and its suitability for energy absorbing application in components subjected to impact or compression loading.

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Wee, Lee Siong, Oh Chai Lian, and Mohd Raizamzamani Md Zain. "Evaluation of the Design Mix Proportion on Mechanical Properties of Engineered Cementitious Composites." Key Engineering Materials 775 (August 2018): 589–95. http://dx.doi.org/10.4028/www.scientific.net/kem.775.589.

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This paper investigates the mechanical properties of engineered cementitious composites (ECC) in terms of compressive strength and flexural behaviour. A new version of ECC made of cement, ground granulated blast-furnace slag (GGBS), local sand, polypropylene (PP) fibers, water and superplasticizer (SP) was employed in this study. Few series of ECC mixtures were designed, cast, and tested in compression and flexural after 28 days of curing. The effect of the fiber content and sand content were studied in different cement-GGBS combination. Compression test results indicated that all ECC mixtures obtained at least 1.8 times compressive strength compared to normal concrete. They also demonstrated more ductile flexural behavior compared to normal concrete from three-point bending test. Increasing fiber content from 1.5% to 2.0% and 2.5% has negative effect on compressive strength but significantly improved modulus of toughness of ECC mixtures. The compressive strength of ECC was reduced when the sand to binder ratio adjusted to 0.4 and 0.6. The flexural behaviour of ECC was slightly improved with the increasing of sand content.

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Wang, Min, C. L. Au, P. K. Lai, and William Bonfield. "Tensile and Compressive Behaviours and Properties of a Bone Analogue Biomaterial." Key Engineering Materials 284-286 (April 2005): 693–96. http://dx.doi.org/10.4028/www.scientific.net/kem.284-286.693.

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For the purpose of mimicking the structure and matching mechanical properties of human cortical bone, a natural composite material, hydroxyapatite (HA) reinforced high density polyethylene (HDPE) has been developed as a bioactive, analogue material for bone replacement. This synthetic composite material is now in clinical use. To understand the deformation behaviour and determine mechanical properties of HA/HDPE composite under different loading modes and loading conditions, tensile and compression tests were performed in the current investigation. It was observed that under tension, HA/HDPE composite exhibited two types of deformation behaviour: ductile and brittle. Under compression, the composite deformed in a ductile manner and did not fracture at high compressive strains. It was found that an increase in HA content resulted in increases in Young’s modulus, compressive modulus, tensile strength and compressive yield strength of the composite. A higher strain rate led to higher modulus and strength values and lower tensile fracture strains of the composite.

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Zhi, Chao, and Hai Ru Long. "Investigation on Compression Properties of Syntactic Foam Reinforced by Warp Knitted Spacer Fabric." Advanced Materials Research 1095 (March 2015): 531–34. http://dx.doi.org/10.4028/www.scientific.net/amr.1095.531.

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The study aimed to investigate the compression behaviors of syntactic foam reinforced by warp knitted spacer fabric (SF-WKSF). Two kinds of SF-WKSF samples were prepared with warp knitted spacer fabric (WKSF) of different surface layer structures. The compression tests were carried out by MTS 810 material test system and the compression properties of SF-WKSF were analyzed based on its compressive stress–strain curves and modulus values obtained from test results. It is indicated that the surface layer structure of WKSF has significant effects on the compression performance of SF-WKSF, the SF-WKSF made with denser surface layer structure shows higher compressive modulus and yield strength compared to neat syntactic foam (NSF).

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Chen, Bo Wang, Ran He, Jian Guo Tan, and Yang Oyang. "Experimental Research on Four-Tube Concrete-Filled Steel Tubular Laced Columns." Advanced Materials Research 311-313 (August 2011): 2204–7. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.2204.

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By means of axial compressive and eccentric compressive tests of four Four-tube Concrete-filled Steel Tubular Laced Columns, to research the mechanical properties and failure modes of this structural without yield point. Research shows that, the failure modes of this model, as well as axial compressive short columns, have the same trend of oblique shear failure, and presenting overall bending failure under eccentric compression. The linear eccentricity takes a biggish influence on mechanical properties of laced columns.

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Liu, Jia, Shan Cheng, Yan Hong Wang, Zhong Liang Ma, and Zhong Liang Xiao. "Study on Mechanical Properties of Gun-Propellants with RDX.doc." Advanced Materials Research 884-885 (January 2014): 154–57. http://dx.doi.org/10.4028/www.scientific.net/amr.884-885.154.

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The cyclotrimethylene trinitramine(RDX) added into gun-propellants can improve the energy of the gun-propellants, but influence their mechanical properties. Under the suitable experimental conditions by using the compression test and drop hammer test, the influence to mechanical properties of gun-propellants by RDX content is obtained. The results indicate that with the increase of RDX, the compressive strength of gun-propellants increases, but impact strength decreases. While, the compressive strength of gun-propellants decreases, but impact strength increase when the temperature rises.

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Salleh, Zulzamri, Md Mainul Islam, and Jayantha Ananda Epaarachchi. "Compressive Behaviour of Low Density Polymeric Syntactic Foams." Applied Mechanics and Materials 799-800 (October 2015): 135–39. http://dx.doi.org/10.4028/www.scientific.net/amm.799-800.135.

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The combinations of polymer resin and glass microballoon are the main materials used to produce syntactic foams. Syntactic foam is a lightweight material that has good mechanical properties and is commonly used as a component for structural materials in civil construction, aerospace and marine applications. Hence, it should have suitable mechanical properties, particularly good compression behaviour. In the present study, the results obtained from compression tests are compressive strength, elastic modulus and specific compression that decrease when increasing of glass microballoon contents (2.0 wt.%, 4.0 wt.%, 6.0 wt.%, 8.0 wt.% and 10.0 wt.%) and also neat resin. The highest strength value for compression testing is owned by 2.0 wt.% which is 88.9 MPa, while the lowest strength is 43 MPa that belongs to 10.0 wt.% of glass microballoon. This shows that the density and weight percentage of glass microballoon in these syntactic foams affect compression properties. Therefore, a further study should be conducted, which includes the effect of compressive failure mechanism.

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Jordan, Jennifer L., Clive R. Siviour, Jason R. Foley, and Eric N. Brown. "Compressive properties of extruded polytetrafluoroethylene." Polymer 48, no. 14 (June 2007): 4184–95. http://dx.doi.org/10.1016/j.polymer.2007.05.038.

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Andrews, M. C., D. Lu, and R. J. Young. "Compressive properties of aramid fibres." Polymer 38, no. 10 (May 1997): 2379–88. http://dx.doi.org/10.1016/s0032-3861(96)00803-8.

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Morooka, Hideo, Yoshiaki Azuma, Yoichi Matsumoto, and Harumi Morooka. "Compressive Properties of Pantyhose Fabric." Textile Research Journal 70, no. 1 (January 2000): 44–52. http://dx.doi.org/10.1177/004051750007000107.

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Ünal, Özer, and Mufit Akinc. "Compressive Properties of Yttrium Oxide." Journal of the American Ceramic Society 79, no. 3 (April 13, 2005): 805–8. http://dx.doi.org/10.1111/j.1151-2916.1996.tb07950.x.

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Yang, Juan, Gai Fei Peng, Yu Xin Gao, and Hui Zhang. "Mechanical Properties and Durability of Ultra-High Performance Concrete Incorporating Coarse Aggregate." Key Engineering Materials 629-630 (October 2014): 96–103. http://dx.doi.org/10.4028/www.scientific.net/kem.629-630.96.

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Ultra-high performance concrete (UHPC) incorporating coarse aggregate was prepared with common raw materials. Fresh concrete had excellent good workability with slump of 265 mm and slump spread of 673 mm. Compressive strength of UHPC at 56 d reached 150 MPa. However, UHPC exhibited high brittleness in terms of spalling failure which occurred during compression loading.The ratio of splitting tensile strength to compressive strength of about 1/18 and the ratio of flexural strength to compressive strength of about 1/14 at 56 d were also associated with the brittleness of UHPC in this research. Mineral admixtures and fluidity of fresh concrete influenced compressive strength of UHPC significantly. Moreover, UHPC had excellent permeation-related durability but considerable shrinkage. Autogenous shrinkage of UHPC was less than half of free shrinkage, for which the reason is unknown and needs further research.

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Arakawa, Jinta, Tatsuya Hanaki, Yoshiichirou Hayashi, Hiroyuki Akebono, and Atsushi Sugeta. "Effect of surface compressive residual stress introduced by surface treatment on fatigue properties of metallic material." MATEC Web of Conferences 165 (2018): 18006. http://dx.doi.org/10.1051/matecconf/201816518006.

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This study considers shakedown in evaluating the fatigue limit of metals with compressive residual stress at the surface. We begin by applying tension-compression fatigue tests to ASTM CA6NM under conditions of controlled load and displacement to obtain fatigue limit diagram in compressive mean stress. The results imply that shakedown occurs under the condition of controlled displacement, therefore, shakedown should be considered when evaluating the fatigue limit of metals with compressive residual stress at the surface.

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Liu, Xi Liang, Shao Feng Liu, Ben Dong Qin, and Da Fang Yang. "Experimental Study on Mechanical Properties of Hybrid Fiber High-Strength Concrete." Applied Mechanics and Materials 204-208 (October 2012): 3809–14. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.3809.

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Design 6 different dosages of C70 hybrid fiber high-strength concrete and a group of ordinary-strength concrete C70. By test of compressive strength and splitting tensile strength, discovery the high-strength hybrid fiber concrete compressive strength is not increasing trend; tensile strength increases significantly, average up to 5.12MPa, tension and compression ratio increased by 12%~40%; specimens eventually destroying the near ductility failure, in the case of 1.2% volume dosage of steel fiber and 0.10% volume dosage of polypropylene fiber, tension and compression ratio reach to 0.0683, hybrid fiber high-strength concrete showed good mixing effect, in the large-scale concrete construction has a certain spread value.

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Voiconi, Tudor, Emanoil Linul, Liviu Marsavina, Jaroslav Kováčik, and Marcin Kneć. "Experimental Determination of Mechanical Properties of Aluminium Foams Using Digital Image Correlation." Key Engineering Materials 601 (March 2014): 254–57. http://dx.doi.org/10.4028/www.scientific.net/kem.601.254.

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This paper presents an experimental characterization of three different types of closed-cell aluminium alloy foams (AlMg1Si0.6, AlSi12Mg0.6 and AlMg0.6Si0.3) under static compressive loading. This study was carried out on half-cylindrical specimens with skin. The influence of foam density on compressive behaviour was investigated for densities ranging from 430 kg/m3 to 935 kg/m3. The compression tests were performed at room temperature (23°C) with a constant crosshead speed of 0.5 mm/min. Strain distribution, yield stress and compressive modulus values were recorded using Digital Image Correlation. Experimental results show that the mechanical properties (Youngs Modulus, yield stress and plateau stress) increase with density.

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Shan, Chan Wen, Maizlinda Izwana Idris, and Imran H. Ghazali. "Flexible Polyurethane Foams Filled with Coconut Coir Fibres and Recycled Tyre - Part II: Compression and Energy Absorption." Advanced Materials Research 488-489 (March 2012): 767–74. http://dx.doi.org/10.4028/www.scientific.net/amr.488-489.767.

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The mechanical properties of flexible PU foams filled with coconut coir fibres and recycled tyre were investigated. The densities of foam composites are slightly increase as 2.5 wt% filler loading to foams. Among all, the highest density value is 54.048 kg/m3as compared with pure foam which is 52.69kg/m3. In compression test, the compressive response of foam composites was presented in three different regions which are elastic, plateau, and densification. The compressive results show the foams filled with 2.5wt% (50F50P) offered the greatest properties. It shows an increment of 10.784% for compressive modulus whereas an increment of 9.329% for compressive strength as compared with pure PU foam. This result may attribute to its varying cellular structure. The compressive results also indicated that there was no any contribution from tyre particles to the foam’s compressive properties unless it is added as the composition described above. Nevertheless, the results of energy analysis show added fillers can enhanced the foam’s energy absorption characteristic. The energy absorbability is found increased on composite which having good compressive properties as well as having cellular structure of possess smaller cell size.

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Kim, Hye Ran, Seung Ju Han, and Hyun Do Yun. "Compressive Properties of High Strength Steel Fiber Reinforced Concrete with Different Fiber Volume Fractions." Applied Mechanics and Materials 372 (August 2013): 215–18. http://dx.doi.org/10.4028/www.scientific.net/amm.372.215.

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This paper describes the experimental results of 70 MPa high strength steel fiber reinforced concrete (SFRC) with different steel fiber volume fractions in compression. The effect of steel fiber on fresh properties, compressive strength, toughness index, cracking procedure of high strength steel fiber concrete is also investigated. The steel fibers were added as the volume fractions of 0%, 0.5%, 1.0%, 1.5% and 2.0%. The cylindrical specimens with Φ100 x 200 for compressive tests were manufactured in accordance with ASTM C 39[. The experimental results showed that the slump of fresh SFRC was inversely proportional to the fiber volume fraction added to high strength concrete. As the addition of steel fiber increased, compressive strength of SFRC decreased. Inclusion of steel fiber improves compressive toughness of high strength SFRC.

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Chen, Meng, Zhi Li, and Zhe An Lu. "Analysis of Failure Patterns and Damage Mechanisms under Impact Compression of Hybrid Fiber Reinforced Concrete." Applied Mechanics and Materials 193-194 (August 2012): 609–13. http://dx.doi.org/10.4028/www.scientific.net/amm.193-194.609.

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In order to studying the failure patterns under impact compression of Hybrid Fiber Reinforced Concrete(HFRC), tests focused on static and dynamic compression properties according to steel fiber reinforced concrete(SFRC) and HFRC are adopted. The equipment of dynamic compression properties test is Ф74mm split Hopkinson pressure bar (SHPB). The static and dynamic compressive strength at four different strain rates of the two materials are obtained, while failure mechanism has been analyzed from specimens’ failure modes in static and dynamic compressive tests, which in turn provides theory basis for the application of HFRC.

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Qin, Li Kun, Ling Xia Gao, and Hong Wei Song. "Influence of Freeze-Thaw Cycles on Multiaxial Strength of Concrete." Applied Mechanics and Materials 405-408 (September 2013): 2715–18. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.2715.

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Mechanical properties experiments of concrete after 0, 25, 50 and 75 freeze-thaw cycles under uniaxial and multiaixial compression were carried out. The uniaxial and multiaxial compressive strengths of ordinary concrete after freeze-thaw cycles were measured. According to the experiment results, the influence of freeze-thaw cycles on the ultimate compressive and tensile strength was analyzed systematically. The influence law of freeze-thaw cycles on compressive strength of concrete under multiaxial compression was obtained. The results indicate that the compressive strength of ordinary concrete after freeze-thaw cycles under multiaxial compression is higher than that under uniaxial compression, and the degree of improvement is depended on its stress ratio. This conclusion can propose theoretical foundation for design of concrete structures in cold environment

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Wang, Xiao Lei, Shun Xi Yan, and Guang Can Zhang. "Experimental Study on Mechanical Properties of Jurassic Soft Rock in Shajihai Mining Area of Xinjiang." Applied Mechanics and Materials 353-356 (August 2013): 20–23. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.20.

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According to the problemsof serious deformation of soft rock roadways and lack of system andcomprehensive study on surrounding rock characteristics and failure mechanismin Shajihai mining area, this paper carried out a series of mechanicalexperiments on the characteristics of surrounding rock in this area includinguniaxial compression test, triaxial compression test and water absorption propertiestest. Mechanical test results show that the compressive strength of surroundingrock of roadway is generally low, and mudstone compressive strength is thelargest which is 19.23 MPa, and compressive strength of the minimum is coalwhich is 11.32 MPa under natural condition. However sandstone and mudstone’sability of water absorbing is strong, and coal saturation strength issignificantly greater than that of mudstone and sandstone. Therefore, we shouldmake full use of the strength of coal in roadway layout and support design.

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Du, Yubing, Zhiqing Zhao, Qiang Xiao, Feiting Shi, Jianming Yang, and Peiwei Gao. "Experimental Study on the Mechanical Properties and Compression Size Effect of Recycled Aggregate Concrete." Materials 14, no. 9 (April 29, 2021): 2323. http://dx.doi.org/10.3390/ma14092323.

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To explore the basic mechanical properties and size effects of recycled aggregate concrete (RAC) with different substitution ratios of coarse recycled concrete aggregates (CRCAs) to replace natural coarse aggregates (NCA), the failure modes and mechanical parameters of RAC under different loading conditions including compression, splitting tensile resistance and direct shear were compared and analyzed. The conclusions drawn are as follows: the failure mechanisms of concrete with different substitution ratios of CRCAs are similar; with the increase in substitution ratio, the peak compressive stress and peak tensile stress of RAC decrease gradually, the splitting limit displacement decreases, and the splitting tensile modulus slightly increases; with the increase in the concrete cube’s side length, the peak compressive stress of RAC declines gradually, but the integrity after compression is gradually improved; and the increase in the substitution ratio of the recycled aggregate reduces the impact of the size effect on the peak compressive stress of RAC. Furthermore, an influence equation of the coupling effect of the substitution ratio and size effect on the peak compressive stress of RAC was quantitatively established. The research results are of great significance for the engineering application of RAC and the strength selection of RAC structure design.

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Li, Hong Fang, Li Guo, and Yi Xia. "Mechanical Properties of Concretes Containing Super-Fine Mineral Admixtures." Applied Mechanics and Materials 174-177 (May 2012): 1406–9. http://dx.doi.org/10.4028/www.scientific.net/amm.174-177.1406.

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The mechanical properties of concretes containing super fine mineral admixtures such as limestone powder, titanium slag, lithium slag and silica ash have been investigated by compression tests. It was found that 10% limestone powder used in cocncrete is beneficial to compressive strength, it reaches 111Mpa after 28 days curing. The optimum mixing amounts of titanium slag, lithium slag and silica ash are 20%, 10% and 10%, respectively. All their 28d compressive strengths exceed 100MPa, reach super-early and super-high strength concrete level. By introducing mineral admixures into concrete, the cement consumption in concrete can be greatly reduced.

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Liu, Yue, Hong-Tao Zhang, Hong-Hao Zhao, Lin Lu, Ming-Yang Han, Jiao-Cai Wang, and Shuai Guan. "Experimental Study on Mechanical Properties of Novel FRP Bars with Hoop Winding Layer." Advances in Materials Science and Engineering 2021 (August 3, 2021): 1–18. http://dx.doi.org/10.1155/2021/9554687.

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Due to the fact that steel reinforcement is vulnerable to corrosion, FRP bars with light weight, high strength, and excellent durability have become a good substitute for ordinary steel bars. FRP bars have high tensile strength, but their compressive strength is relatively low and often neglected, so the application of FRP bars in compression members has been restricted. This paper proposes a new pultrusion-winding-pultrusion method to improve the compressive ability of FRP bars. A hoop FRP layer is winded on the outer surface of the pultruded FRP core, and a longitudinal pultruded layer and ribs are also added on the outermost surface. In this paper, mechanical properties of this novel FRP bar with hoop winding layer are investigated. First, monotonic tensile and compressive tests on traditional and novel GFRP bars were conducted. Then, cyclic tension-compression loading tests were also carried out on the two types of GFRP bars. Test results showed that the compressive ultimate bearing capacities of GFRP bars with winding layers were 10∼20 kN greater than those of the traditional GFRP bars, and the compressive ductility of the novel GFRP bars was also improved. Furthermore, the tensile stress-strain behaviors of both GFRP bars were linear-elastic and the added winding layer did not greatly influence the tensile properties of the GFRP bars. Moreover, for the cyclic loading test, the compressive ultimate load of GFRP bars was 80%∼90% of that under monotonic compressive test, and the tensile ultimate load was 45%∼65% of that under monotonic tensile test. Compared with the GFRP bar without winding layer, the overall stiffness of the novel GFRP bar was greater than that of the traditional one and the ultimate load of the novel GFRP bar was also greater. In addition, seeing that the residual displacement of the novel GFRP bar was greater than that of the traditional GFRP bar, winding hoop fibers on the outer surface of the core is a useful way to improve the energy dissipation capacity of the GFRP bar.

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Hasan, Muttaqin, Saiful Husin, and Cut Nursaniah. "Mechanical Properties of Concrete in Compression Exposed to Sulfuric Acid." Key Engineering Materials 711 (September 2016): 302–9. http://dx.doi.org/10.4028/www.scientific.net/kem.711.302.

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This paper presents the degradation of compressive strength and stiffness of concrete after immersed in 2,5 % sulfuric acid solution. The durations of immersion are 0, 3, 7, 14, and 28 days. After the immersion, ultrasonic pulse velocity and compression tests are performed on the specimens. The relative dynamic elastic modulus, compressive strength and its initial stiffness decrease with increasing the duration of immersion, as a result of the increasing microcracks in the concrete. The strain at peak stress increases with increasing the duration of immersion. The degradation of compressive strength, the degradation of initial stiffness and the value of strain at peak stress of damaged concrete are formulated as a function of relative dynamic elastic modulus. A simple mathematical expression for stress-strain relationship of concrete damaged by sulfuric acid is proposed and stress-strain curves at different level of damage are compared.

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Liu, Han Bing, Hu Zhu Zhang, and Jing Wang. "Test Study on the Compressive Strength Properties of Compacted Clayey Soil." Key Engineering Materials 703 (August 2016): 380–85. http://dx.doi.org/10.4028/www.scientific.net/kem.703.380.

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In order to study the effect of water content, degree of compaction and stress state on bearing capacity of subgrade, the engineering compacted clayey soil was taken as the subject investigated, regulation of compressive strength changing with water content, degree of compaction and confining pressure were analyzed through triaxial compression test, and function relationships between compressive strength and water content, degree of compaction and stress state were fitted based on the test data. Results show that effects of water content, degree of compaction and confining pressure on compressive strength properties of subgrade compacted clayey soil are all remarkably. The compressive strength decreases according to a quadratic function with the increase of water content, as well as increases in accordance with a quadratic function with the increase of the degree of compaction, and increases linearly with the increase of confining pressure. Improving the construction compaction standard properly, adopting the essential lateral confinement measure and keeping a lower water content of the subgrade in service can improve the bearing capacity and stability of the highway subgrade.

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Ide, T., M. Tane, T. Ikeda, S. K. Hyun, and H. Nakajima. "Compressive properties of lotus-type porous stainless steel." Journal of Materials Research 21, no. 1 (January 1, 2006): 185–93. http://dx.doi.org/10.1557/jmr.2006.0016.

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Lotus-type porous stainless steel (SUS304L), possessing cylindrical pores aligned in one direction, was fabricated by means of a continuous zone melting technique undera pressurized hydrogen/helium atmosphere. Compression tests were carried out on the resultant lotus stainless steel not only in the directions parallel and perpendicular tothe elongated-pore direction but also in other directions to reveal its anisotropic compressive behavior. The macroscopic deformation modes depend on porosity and the angle between the elongated-pore direction and compression direction, which is a unique characteristic resulting from its anisotropic porous structure. The yield stress in the pore direction decreases almost linearly with increasing porosity, while that in the perpendicular direction decreases more rapidly. The yield stress in the direction of θ from the elongated-pore direction decreases monotonically with increase in θ. The yield behavior of lotus stainless steel was described using micromechanical mean-field theory.

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Journal articles on the topic 'Compressive properties'

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