Relevant bibliographies by topics / Crack measurement

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Crack measurement'

Author: Grafiati
Published: 4 June 2021
Last updated: 13 February 2022

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Journal articles on the topic "Crack measurement"

1

Lin, Bin, Hong Tao Zhu, Hui Wu, Z. F. Wang, and S. Y. Yu. "Evaluation and Measurement of Surface/Subsurface Crack Damage of Ground Ceramics." Materials Science Forum 471-472 (December 2004): 47–51. http://dx.doi.org/10.4028/www.scientific.net/msf.471-472.47.

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While be ground, ceramic is prone to engender surface/subsurface crack damage layer because of great grinding force and high brittle of the material. The crack damage layer was investigated in this research. In experiment, it is observed that the surface/subsurface crack damage layer consists of three kinds of cracks: surface micro-cracks, surface macro-cracks and subsurface crack system. To evaluate expediently the degree of damage to the machined components, the index of surface/subsurface crack damage - Dc, is defined.
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Wong, R. H. C., Y. S. H. Guo, K. T. Chau, Wei Shen Zhu, and Shu Cai Li. "The Crack Growth Mechanism from 3-D Surface Flaw with Strain and Acoustic Emission Measurement under Axial Compression." Key Engineering Materials 353-358 (September 2007): 2357–60. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.2357.

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This paper presents the crack growth mechanism from a 3-D surface flaw on gabbro specimens using strain measurement and acoustic emission (AE) technique. Based on the results of strain and AE measurement, microcracks initiated inside the rock and extend to the surface of the specimen. With the observation from the measurements, four types of crack patterns initiate wing crack, anti-wing crack (opposite direction of wing crack), petal crack and compressive crack. The strain values of anti-wing cracks are larger 1 to 2 times than that of wing crack. The AE energy release from anti-wing crack is higher 2.5 times than that of wing crack, while the energy release form wing crack is the least but the compressive crack is the highest. Thus, the appearance of initiation and propagation of the anti-wing crack and compressive crack are very actively than that of the wing crack. The strain and AE measurement is not only to provide a clear concept on the mechanisms of crack growth form a 3-D surface flaw but also to provide useful knowledge on the AE property of the crack patterns.
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Yuan, Yingtao, Zhendong Ge, Xin Su, Xiang Guo, Tao Suo, Yan Liu, and Qifeng Yu. "Crack Length Measurement Using Convolutional Neural Networks and Image Processing." Sensors 21, no. 17 (September 1, 2021): 5894. http://dx.doi.org/10.3390/s21175894.

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Fatigue failure is a significant problem in the structural safety of engineering structures. Human inspection is the most widely used approach for fatigue failure detection, which is time consuming and subjective. Traditional vision-based methods are insufficient in distinguishing cracks from noises and detecting crack tips. In this paper, a new framework based on convolutional neural networks (CNN) and digital image processing is proposed to monitor crack propagation length. Convolutional neural networks were first applied to robustly detect the location of cracks with the interference of scratch and edges. Then, a crack tip-detection algorithm was established to accurately locate the crack tip and was used to calculate the length of the crack. The effectiveness and precision of the proposed approach were validated through conducting fatigue experiments. The results demonstrated that the proposed approach could robustly identify a fatigue crack surrounded by crack-like noises and locate the crack tip accurately. Furthermore, crack length could be measured with submillimeter accuracy.
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Jung, Ju-Yeong, Hyuk-Jin Yoon, and Hyun-Woo Cho. "A Study on Crack Depth Measurement in Steel Structures Using Image-Based Intensity Differences." Advances in Civil Engineering 2018 (2018): 1–10. http://dx.doi.org/10.1155/2018/7530943.

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This paper seeks to propose an image-based noncontact testing method in crack depth measurement. To this end, it predicted the crack depth using the intensity values of cracks and verified its validity. To analyze the intensity values of cracks, eight stainless steel specimens with an increase in crack depths ranging from 0 to 17.5 mm at an average of 2.5 mm were fabricated, and a contrast index was attached to the center of the crack of the specimens painted with black matte spray for accurate analysis. Through various experiments, it was found that the intensity values of the cracks which decrease with the depth of the cracks were inductively formulated, and the average error was about 15% when the crack depth predicted by the empirical equation was compared with the actual crack depth. In addition, the validation of the intensity reduction equation obtained by the inductive method was verified, and it was confirmed that the crack depth can be predicted by the intensity value of the crack.
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Sekhar, A. S., and P. Balaji Prasad. "Crack Identification in a Cantilever Beam Using Coupled Response Measurements." Journal of Engineering for Gas Turbines and Power 120, no. 4 (October 1, 1998): 775–77. http://dx.doi.org/10.1115/1.2818466.

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Identification of crack location and magnitude through measurement in changes in system characteristics, such as modal measurements, has been studied by various researchers. In the present work based on the new method proposed by Gounaris et al. (1996) for crack detection through coupled response measurements, experiments were carried out on a cracked cantilever beam for eigenfrequencies, bending, and axial response measurements. It has been observed that the rate of change of direct response (bending) is much less at small cracks, while that of the coupled response (axial) changes substantially, which allows for diagnoses of smaller cracks.
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Yang, Hao, and Xiangyang Xu. "Intelligent crack extraction based on terrestrial laser scanning measurement." Measurement and Control 53, no. 3-4 (January 7, 2020): 416–26. http://dx.doi.org/10.1177/0020294019877490.

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The hazards of cracks, which could badly decrease reliability and safety of structures, are receiving increasing attention with the popularity of tunnel constructions. Traditional crack inspection relies on visual examination, which is time-, cost- and labor-intensive. Therefore, how to identify and measure cracks intelligently is significantly essential. The paper focuses on the Canny method to extract cracks of tunnel structures by the intensity value of reflectivity. We propose and investigate a novel method which combines dilation and the Canny algorithm to identify and extract the cracks automatically and intelligently based on the point cloud data of terrestrial laser scanning measurement. In order for measurement of cracks, the projection of summed edge pixels is adopted, where a synthesis is carried out on the detection results with all sampling parameters. Based on the synthesized image, vertical crack presents two sharp peaks where the space of the peaks indicates the average width of the crack, as well as its position. The advantage of the method is that it does not require determination of Canny detector parameters. The deviation between manual measurement and Canny detection is 2.92%.
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Sarker, M. M., T. A. Ali, A. Abdelfatah, S. Yehia, and A. Elaksher. "A COST-EFFECTIVE METHOD FOR CRACK DETECTION AND MEASUREMENT ON CONCRETE SURFACE." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W8 (November 14, 2017): 237–41. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w8-237-2017.

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Crack detection and measurement in the surface of concrete structures is currently carried out manually or through Non-Destructive Testing (NDT) such as imaging or scanning. The recent developments in depth (stereo) cameras have presented an opportunity for cost-effective, reliable crack detection and measurement. This study aimed at evaluating the feasibility of the new inexpensive depth camera (ZED) for crack detection and measurement. This depth camera with its lightweight and portable nature produces a 3D data file of the imaged surface. The ZED camera was utilized to image a concrete surface and the 3D file was processed to detect and analyse cracks. This article describes the outcome of the experiment carried out with the ZED camera as well as the processing tools used for crack detection and analysis. Crack properties that were also of interest were length, orientation, and width. The use of the ZED camera allowed for distinction between surface and concrete cracks. The ZED high-resolution capability and point cloud capture technology helped in generating a dense 3D data in low-lighting conditions. The results showed the ability of the ZED camera to capture the crack depth changes between surface (render) cracks, and crack that form in the concrete itself.
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Garami, Tamás, Oliver Krammer, Gábor Harsányi, and Péter Martinek. "Method for validating CT length measurement of cracks inside solder joints." Soldering & Surface Mount Technology 28, no. 1 (February 1, 2016): 13–17. http://dx.doi.org/10.1108/ssmt-10-2015-0029.

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Purpose – This paper aims to develop a method to measure the length of cracks inside solder joints, which enables the validation of computed tomography (CT) crack length measurements. Design/methodology/approach – Cracks were formed inside solder joints intentionally by aging solder joints of 0603 size resistors with thermal shock (TS) test (−40 to +140°C, 2,000 cycles), and CT images were captured about them with different rotational increment (1/4, 1/2 and 1°) of sample projection. The length of cracks was also measured with our method, which is based on capturing high-resolution radiography X-ray images about the cracks in two perpendicular projection planes. The radiography results were compared to the CT measurements. The percentage error for the different CT rotational increment settings was calculated, and the optimal CT settings have been determined. Findings – The results have proven that reducing the rotational increment increases the sharpness of the captured images and the accuracy of crack length measurements. Nevertheless, the accuracy compared to high-resolution radiography measurements is only slightly better at 1/4° rotational increment than in the case of 1/2° rotational increment. It should be also noted that the 1/4° increment requires twice as much time for capturing the images as the 1/2° increment. So, the 1/2° rotational increment of sample projection is the optimal setting in our investigated case for measuring crack lengths. Practical implications – The developed method is applicable to find the optimal settings for CT crack length measurements, which provides faster analysation of large quantity samples used, e.g. at life-time tests. Originality/value – There is a lack of information in the literature regarding the optimisation of CT measurement set-up, e.g. a slightly larger value of the sample rotational increment can provide acceptable resolution with much faster processing time. Thus, the authors developed a method and performed research about optimising CT measurement parameters.
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Cobb, A. C., J. E. Michaels, and T. E. Michaels. "An integrated approach to local ultrasonic monitoring of fastener hole fatigue cracks." Aeronautical Journal 113, no. 1150 (December 2009): 775–88. http://dx.doi.org/10.1017/s0001924000003432.

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Abstract Ultrasonic nondestructive evaluation methods are routinely used to detect and size fatigue cracks near fastener holes in aircraft structures as a part of scheduled maintenance. In contrast, statistical crack propagation models provide an estimate of the expected fatigue life assuming a known crack size and future fatigue loadings. Here an integrated approach for in situ diagnosis and prognosis of fastener hole fatigue cracks is proposed and implemented that incorporates both ultrasonic monitoring and crack growth laws. The sensing method is an ultrasonic angle beam technique, and cracks are automatically detected from the ultrasonic response. An extended Kalman filter is applied to combine ultrasonically estimated crack sizes with a crack growth law, effectively using the time history of the ultrasonic results rather than only the most recent measurement. A natural extension of this method is fatigue life prognosis. Results from fatigue tests on 7075-T651 aluminium coupons show improved crack size estimates as compared to those obtained from ultrasonic measurements alone, and also demonstrate the capability of predicting the remaining life. This approach for fatigue crack detection, sizing and prognosis is an example of a general strategy for in situ monitoring of structural damage whereby improved results are achieved from the integration of noisy measurements with imperfect crack growth models.
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Reisgen, Uwe, Christoph Geffers, Rahul Sharma, and Jana von der Heydt. "In Situ Measurement of Thermal Strain during Fusion Welding." Materials Science Forum 768-769 (September 2013): 644–51. http://dx.doi.org/10.4028/www.scientific.net/msf.768-769.644.

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Temperature-induced strain with, at the same time, reduced formability is, among other things, responsible for crack development in the range of high temperatures. For a more detailed examination of these so-called hot cracks, experimental measurements of the strain during the welding process have been carried out using neutron diffraction. The measurement of strain is important since it exerts decisive influence on the development of cracks.
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Dissertations / Theses on the topic "Crack measurement"

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Mirzaei, Majid. "On fatigue crack closure analysis and measurement." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=70339.

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This thesis describes a novel approach to the analysis of fatigue crack closure phenomena. Based on the proposed model, the combined effect of residual plastic stretch, asperity mismatch, and corrosion debris on the closure behavior of a fatigue crack can be simulated by a hypothetical rigid insert located in an ideal crack wake. Accordingly, the crack closing period can be modeled by a gradual contact between the ideal crack faces and the rigid insert.
The formulation of the model results in a set of equations which can predict the closure load as well as the load-CMOD characteristics using the residual CMOD at zero load as a unique experimental input. Based on the initial model, the final form of the derived equations are either logarithmic or quadratic. While the latter can be solved directly for the closure load, the former requires a numerical solution.
The model qualitatively predicts the effect of gradual crack wake removal on the crack closure load level and the load-CMOD behavior. It also accounts for the response of a cracked component to an anomalous crack wake formed by single or block overloads.
The model is verified, both qualitatively and quantitatively, using specifically designed experimental techniques, a variety of specimen sizes, and two different alloys.
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Arne, Kevin C. "Crack depth measurement in reinforced concrete using ultrasonic techniques." Thesis, Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51914.

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Concrete is the most widely used construction material in the world, so the assessment of damage in concrete is critical from the point of view of both safety and cost. Of particular interest are macro cracks that extend through the concrete cover of the reinforcement, which can potentially expose the reinforcement to corrosive elements. The high density of scatterers such as aggregate and voids in concrete makes quantitative imaging with coherent ultrasound difficult. As an alternative, this research focuses on diffuse energy based ultrasonic methods rather than coherent ultrasonic methods for crack depth assessment. Two types of ultrasonic measurements were made on real cracks formed under four point bending: one that focuses on time of flight measurements from an impactor; while the other uses the arrival time of maximum energy in a diffuse field excited by an impulsive load from a transducer. Each of these ultrasonic techniques is used to interrogate a macro crack in a concrete beam, and the results are compared to determine their accuracy and robustness. The actual crack depth is determined using direct surface measurements and a destructive dye-injected approach with drilled cores. The results suggest that the diffusion method, using a maximum energy approach, more accurately estimates the crack than visual inspection and impact echo methods, which overestimate the depth.
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Wallhead, Ian. "Crack closure measurement by the optical method of caustics." Thesis, Open University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241083.

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Kianzad, Siamak. "Measurement of Thermal Insulation properties of TBC inside the Combustion chamber." Thesis, Luleå tekniska universitet, Materialvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-61917.

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This master thesis project was performed in collaboration with Scania CV AB, Engine Materials group. The purpose with the project was to investigate different ceramic TBC (Thermal Barrier Coating) thermal insulation properties inside the combustion chamber. Experimental testing was performed with a Single-Cylinder engine with TBC deposited on selected components. A dummy-valve was developed and manufactured specifically for this test in order to enable a water cooling system and to ease the testing procedure. The dummy-valve consists of a headlock, socket, valve poppet and valve shaft. Additionally, a copper ring is mounted between the cylinder head and the valve poppet to seal the system from combustion gases. Thermocouples attached to the modified valve poppet and valve shaft measured the temperature during engine test to calculate the heat flux. The TBCs consisted of three different materials: 7-8% yttrium-stabilized zirconia (8YSZ), gadolinium zirconia and lanthanum zirconia. The 8YSZ TBC was tested as standard, but also with microstructural modifications. Modifications such as pre-induced segmented cracks, nanostructured zones and sealed porosity were used. The results indicated that the heat flux of 8YSZ-standard, 8YSZ-nano and 8YSZ-segmented cracks was in level with the steel reference. In the case of 8YSZ-sealed porosity the heat flux was measured higher than the steel reference. Since 8YSZ-standard and 8YSZ-sealed porosity are deposited with the same powder it is believed that the high heat flux is caused by radiative heat transfer. The remaining samples have had some microstructural changes during engine testing. 8YSZ-nano had undergone sintering and its nanostructured zones became fewer and almost gone after engine testing leading to less heat barrier in the top coat of the TBC. However, for 8YSZ-segmented cracks and gadolinium zirconia lower heat flux was measured due to the appearance of horizontal cracks. These cracks are believed to act as internal barriers as they are orientated perpendicular to the heat flow. During long-time (5 hour) engine tests the 8YSZ-standard exhibited the same phenomena: a decrease in heat flux due to propagation of horizontal cracks. One-dimensional heat flux was not achieved and the main reason for that was caused by heating and cooling of the shafts outer surface. However, the dummy-valve system has proven to be a quick, easy and stable to perform tests with a Single-Cylinder engine. Both water-cooling and long-time engine tests were conducted with minor issues. The dummy-valve has been further developed for future tests. Changes to the valve shaft are the most remarkable: smaller diameter to reduce heat transfer and smaller pockets to ensure better thermocouple positioning. Another issue was gas leakage from the combustion chamber through the copper ring and valve poppet joint. The copper ring will be designed with a 1 mm thick track to improve sealing, hence better attachment to the valve poppet.
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Huntley, J. M. "Laser speckle and its application to strength measurement and crack propagation." Thesis, University of Cambridge, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233260.

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The technique of laser speckle photography has been developed with the aim of measuring the strain field around the tip of a fast crack. An image processing system to allow automatic point-by-point analysis of a speckle photograph is described. The Young's fringes diffraction pattern, produced by directing a narrow laser beam through the photograph, is digitised and processed by computer. Two algorithms have been developed based on Fourier and Walsh spectral analysis. The system can measure speckle displacements with an accuracy of better than 0.1 μm. A new technique for measuring time-varying displacement fields by multiple exposure of a single photograph is presented. Results are shown from a five-exposure speckle photograph of a cantilever deformed under quasi-static conditions. Extension of the technique to dynamic problems requires a stroboscopic laser light source; one chapter deals with the development of a Q-switched ruby laser for this purpose. Modulation of the cavity losses with a Pockels cell at up to 1 MHz results in a train of short (~50 ns) light pulses at the modulation frequency. Results are presented from the analysis of speckle photographs of cracks in polymethylmethacrylate (PMMA) under quasi-static loading. Three different data analysis methods for estimating the stress intensity factor from the displacement field are proposed and evaluated. Preliminary results from dynamic crack propagation studies are described. The dynamic stress intensity factor is estimated from double exposure speckle photographs of fast cracks in PMMA, recorded with the ruby laser in double pulse mode. The application of the techniques of moire and high speed photography to the study of dynamic fracture is also discussed; results are presented from a sequence of moire photographs recorded at 5 x 105 frames s-1 . Further topics covered in the dissertation include a theoretical analysis of viscoelastic losses as a function of crack velocity, and strain-to-failure measurements on plastic bonded explosives in the Brazilian test using laser speckle photography.
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Kamil, Ridha. "Processing improvement of moiré interferometry for accurate crack-tip deformation measurement." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=1962.

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Thesis (M.S.)--West Virginia University, 2001.
Title from document title page. Document formatted into pages; contains v, 81 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 80-81).
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Sahney, Reena Carleton University Dissertation Engineering Mechanical and Aerospace. "Development of a crack measurement system for CANDU pressure tube burst testing." Ottawa, 1994.

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La, Porta Filomena A. "High magnification moiré interferometric measurement of crack tip deformation fields in stainless steels." Thesis, Loughborough University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420985.

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Zhang, Cheng. "Influence of surface roughness on thermography measurement." Thesis, Högskolan Väst, Avd för automationssystem, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-6842.

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This university Bachelor's Thesis was performed to explore the influence of surface roughness on the thermography measurement. Thermography is a non-destructive testing method which can be used to detect cracks. However, it is hard to define how the surface roughness influences the emissivity and the result of a thermography measurement, as well as how the angle of the excitation source influences the result. Therefore, this work aims to define how the heating angle and surface roughness influence the thermography measurement, define the relationship between surface roughness and emissivity for the same crack, and define the influence of the angles which composed of the heating source, the direction of crack and the direction of surface roughness on thermography measurement. In this report, the theories of radiation and Signal-to-noise ratio (SNR) were explained, clearly. Also, two kinds of experiments were set up. One is focus on how the heating angle influence the thermography measurement, the other is focus on how the angle of the heating source, in relation to the crack direction and the direction of surface roughness, influence the SNR value. The conclusions of these experiments are that the heating of a crack increases as the angle decreases (from wide side to narrow side) and the angle ofincreases (from horizontal to vertical). Moreover, the SNR value decreases as the surface roughness increases. For the same surface roughness, the SNR value increases with increased crack angle (0°, 45° or 90°) and with decreased sample position angle (horizontal, 45°or vertical). What is more, the higher surface roughness, the larger the influence of the crack angle and the sample position angle. Finally, when the surface is polish, the crack angle and the sample position angle does not have any influence.
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Mostafavi, Reza. "Non-uniform AC field measurement in NDE of metals : analysis and an array system." Thesis, University of Essex, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285852.

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Books on the topic "Crack measurement"

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McClung, RC, and JC Newman, eds. Advances in Fatigue Crack Closure Measurement and Analysis: Second Volume. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 1999. http://dx.doi.org/10.1520/stp1343-eb.

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Dowding, C. H. Micrometer crack response to vibration and weather. Cleveland, Ohio: International Society of Explosives Engineers, 2008.

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Heasler, P. G. Ultrasonic inspection reliability for intergranular stress corrosion cracks: A round robin study of the effects of personnel, procedures, equipment and crack characteristics. Washington, DC: Division of Engineering, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1990.

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North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Automated measurement of crack length and loadline displacement at elevated temperature. S.l: s.n, 1988.

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Leeuwen, H. P. van. Automated measurement of crack length and load line displacement at elevated temperature. Neuilly sur Seine, France: AGARD, 1988.

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Newman, J. C. An evaluation of the plasticity-induced crack-closure concept and measurement methods. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1998.

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Nykänen, Timo. Mk-factor equations and crack growth simulations for fatigue of fillet-welded t-joints. Lappeenranta: Lappeenranta University of Technology, 1993.

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Shah, Priti Kotak. On the measurement of fatigue crack growth rates of steels using non-standard specimens. Mumbai: Bhabha Atomic Research Centre, 2004.

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Toivonen, Aki. Stress corrosion crack growth rate measurement in high temperature water using small precracked bend specimens. Espoo [Finland]: VTT Technical Research Centre of Finland, 2004.

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Singh, R. N. Delayed hydride cracking velocity and crack growth measurement using DCPD technique in Zr-2.5Nb pressure tube material. Mumbai: Bhabha Atomic Research Centre, 2000.

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Book chapters on the topic "Crack measurement"

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Tebaldi, Gabriele, Alex Apeagyei, Denis Jelagin, and Augusto Cannone Falchetto. "Advanced Measurement Systems For Crack Characterization." In RILEM State-of-the-Art Reports, 155–227. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76849-6_4.

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Leevers, P. S. "Impact and rapid crack propagation Measurement Techniques." In Polymer Science and Technology Series, 130–33. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-015-9231-4_28.

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Leevers, P. S. "Slow Crack Growth and Fracture: Measurement Techniques." In Polymer Science and Technology Series, 208–10. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-015-9231-4_45.

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Mezil, Sylvain, Nikolay Chigarev, Vincent Tournat, and Vitalyi Gusev. "Nonlinear Frequency-Mixing Photoacoustic Characterisation of a Crack." In Springer Series in Measurement Science and Technology, 235–81. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-1461-6_6.

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Park, Philip, Yong Hak Huh, Dong Jin Kim, and Byung Jik Son. "Crack Detection by Static Measurement in Steel Beams." In Advanced Nondestructive Evaluation I, 394–99. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-412-x.394.

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Reu, Phillip L., Brendan R. Rogillio, and Gerald W. Wellman. "Crack Tip Growth Measurement Using Digital Image Correlation." In Experimental Analysis of Nano and Engineering Materials and Structures, 555–56. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6239-1_275.

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Ohara, Yoshikazu, Tsuyoshi Mihara, and Kazushi Yamanaka. "Nonlinear Ultrasonic Phased Array for Measurement of Closed-Crack Depth." In Springer Series in Measurement Science and Technology, 165–234. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-1461-6_5.

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Arai, Tatsuya, and Kenichi Sakaue. "Measurement of Crack Tip Displacement Field in Desiccating Paste." In Fracture, Fatigue, Failure, and Damage Evolution, Volume 5, 67–72. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-06977-7_9.

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Lugg, M. C., W. D. Dover, and D. R. Parramore. "The A.C.F.M. Technique: Recent Advances in Crack Depth Measurement." In Review of Progress in Quantitative Nondestructive Evaluation, 403–8. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4615-7763-8_41.

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Tu, Haoyun. "Optical Measurement of Crack Propagation with the ARAMIS System." In Numerical Simulation and Experimental Investigation of the Fracture Behaviour of an Electron Beam Welded Steel Joint, 119–31. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-67277-9_7.

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Conference papers on the topic "Crack measurement"

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Kufrin, Luka, O. Postolache, A. Lopes Ribeiro, and H. M. Geirinhas Ramos. "Image analysis for crack detection." In 2010 IEEE Instrumentation & Measurement Technology Conference Proceedings. IEEE, 2010. http://dx.doi.org/10.1109/imtc.2010.5488203.

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Chaouadi, Rachid, Marlies Lambrecht, and Robert Gérard. "Crack Resistance Curve Measurement With Miniaturized CT Specimen." In ASME 2018 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/pvp2018-84690.

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The use of miniature compact tension (mini-CT) specimens for fracture mechanics was experimentally demonstrated to allow the characterization of ferritic steels in the transition regime. In particular, the master curve transition temperature T0 can confidently be determined according to the ASTM E1921 standard using mini-CT specimens. This means that specimen size effect is well taken into account if loss of constraint is limited by restricting the test temperature range to remain below the allowed maximum loading level. In the upper shelf ductile regime, where stable crack growth occurs, a number of challenges should be overcome to use such a geometry to derive the crack resistance curve, or JR-curve, transferrable to a structure. Indeed, despite a large scatter, the experimental data on several materials suggest a size effect that underestimates the crack resistance when reducing specimen size. The crack resistance behavior of several reactor pressure vessel materials was investigated with square-sized ligament compact tension specimens of various size ranging from 1 inch-thickness (B = 25 mm) to the smallest thickness (B = 4.2 mm) of the mini-CT. The main objective of this paper is to estimate the crack resistance behavior of RPV steels that would be obtained with a standard 1T-CT specimen by using mini-CT with the appropriate specimen size correction. After a series of scaling attempts that were not successful, based on a simple dimensional analysis, a simple analytical formulation based on specimen thickness and ligament is suggested to account for specimen size effect for the CT geometry. Reasonable agreement could generally be found on a number of RPV materials between crack resistance measured with mini-CT and standard 1T-CT specimens.
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Dowding, Charles H., Hasan Ozer, and Mathew Kotowsky. "Wireless Crack Measurement for Control of Construction Vibrations." In GeoCongress 2006. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40803(187)37.

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Deshmukh, Srikar, Irshad Mohammad, Xiang Xu, and Haiying Huang. "Unpowered antenna sensor for crack detection and measurement." In SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, edited by Masayoshi Tomizuka. SPIE, 2010. http://dx.doi.org/10.1117/12.847573.

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Schiefelbein, Bryan E., Stephen D. Holland, and Ashraf Bastawros. "Precision measurement of crack closure state with vibrothermography." In 42ND ANNUAL REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: Incorporating the 6th European-American Workshop on Reliability of NDE. AIP Publishing LLC, 2016. http://dx.doi.org/10.1063/1.4940450.

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In, Chi Won, Jin-Yeon Kim, Laurence L. Jacobs, and Kimberly Kurtis. "Crack depth measurement in concrete using diffuse ultrasound." In REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: Volume 31. AIP, 2012. http://dx.doi.org/10.1063/1.4716391.

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Li, Jingyi, and Ning Wang. "A Study of Crack Detection Algorithm." In 2015 Fifth International Conference on Instrumentation & Measurement, Computer, Communication and Control (IMCCC). IEEE, 2015. http://dx.doi.org/10.1109/imccc.2015.254.

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Dvorsky, Matthew, Mohammad Tayeb Al Qaseer, and Reza Zoughi. "Crack Sizing using Dual-Polarized Microwave SAR Imaging." In 2020 IEEE International Instrumentation and Measurement Technology Conference (I2MTC). IEEE, 2020. http://dx.doi.org/10.1109/i2mtc43012.2020.9129478.

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Bernieri, Andrea, Luigi Ferrigno, Marco Laracca, and Mario Molinara. "An SVM Approach to Crack Shape Reconstruction in Eddy Current Testing." In 2006 IEEE Instrumentation and Measurement Technology. IEEE, 2006. http://dx.doi.org/10.1109/imtc.2006.328502.

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Andrea Bernieri. "An SVM Approach to Crack Shape Reconstruction in Eddy Current Testing." In 2006 IEEE Instrumentation and Measurement Technology. IEEE, 2006. http://dx.doi.org/10.1109/imtc.2006.236815.

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Reports on the topic "Crack measurement"

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Kirchner, Ted E., and John McCoy. Automated Fatigue Crack Growth Measurement. Fort Belvoir, VA: Defense Technical Information Center, July 1988. http://dx.doi.org/10.21236/ada198642.

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Ratwani, Mohan M. Development of Validated Crack Measurement System for Vibrating Structures. Fort Belvoir, VA: Defense Technical Information Center, January 2002. http://dx.doi.org/10.21236/ada399661.

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Wendelberger, James, Elizabeth Kelly, and Kimberly Kaufeld. Automatic Potential Crack Identification from Wide Area Measurement System (WAMS) Data. Office of Scientific and Technical Information (OSTI), February 2021. http://dx.doi.org/10.2172/1764869.

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Huang, Haiying, J. C. Chiao, and Ronald L. Carter. Exploratory Study of MM-wave Patch Antennas for Strain Measurement and Crack Detection. Fort Belvoir, VA: Defense Technical Information Center, August 2008. http://dx.doi.org/10.21236/ada583042.

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Wendelberger, James, Elizabeth Kelly, Kimberly Kaufeld, Michael Martinez-Rodriguez, and Emmanual Perez. Automatic Potential Crack Identification from Wide Area Measurement System (WAMS) Data with Software Demonstration. Office of Scientific and Technical Information (OSTI), February 2021. http://dx.doi.org/10.2172/1766954.

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Stuffle, Kevin, Raymond A. Cutler, Dinesh K. Shetty, and Anil V. Virkar. Development of a Microcircuit Grid Technique for Automated Crack Length Measurement for Fatigue Testing at Elevated Temperature. Fort Belvoir, VA: Defense Technical Information Center, May 1988. http://dx.doi.org/10.21236/ada198003.

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Tylczak, Joseph. Measurement of Fatigue and Static Crack Growth Rate of X65 Line Pipe Steel in 3.5% NaCl containing CO2 under Cathodic Polarization. Office of Scientific and Technical Information (OSTI), May 2020. http://dx.doi.org/10.2172/1634188.

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Kobayashi, Takeshi, and Akira Banno. A New Measurement and Evaluation Approach for High-Quality Automotive P/M Parts~Analtyical Technique of Manufacturing Phenomenon and Inspection Technique for Crack Detection. Warrendale, PA: SAE International, September 2005. http://dx.doi.org/10.4271/2005-08-0603.

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Danko, G. A., S. R, III Low, R. deWit, and R. J. Fields. Wide plate crack arrest tests: instrumentation for dynamic strain measurements. Gaithersburg, MD: National Bureau of Standards, January 1985. http://dx.doi.org/10.6028/nbs.ir.85-3289.

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Durbin, Samuel, Eric Lindgren, Ramon Pulido, and Kurtis Ford. Improved Measurement of Particulate Retention in Simulated Stress Corrosion Cracks. Office of Scientific and Technical Information (OSTI), March 2019. http://dx.doi.org/10.2172/1761920.

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