Abstract
Some laboratory nondestructive evaluation techniques have been invaluable in studying fracture processes in concrete. Several nondestructive evaluation methods including acoustic emission (AE), computer vision, digital speckle pattern interferometry (DSPI), and X-ray microtomography (XMT) were used to examine the fracture behavior of concrete in tension and compression. Acoustic emission testing was used in an attempt to characterize the fracture properties of individual microcracks. As the specimens were loaded, AE waveform data was recorded, and analyzed for source location and source characterization. While DSPI analysis is limited to the specimen surface, the resolution is detailed such that microcracks on the order of 0.25 μm can be detected. Computer vision is a very useful method to measure crack openings for multiple crack development. It also can be used in conjunction with a hydraulic testing machine, which often generates vibration problem for some sensitive techniques. Crack patterns in cement-based materials under various material compositions and testing conditions are examined.
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Choi, S. and Shah, S.P. (1997). Deformation measurement in concrete under compression using image correlation. Journal of Experimental Mechanics 37(3), 307–313.
Choi, S., Thienel, K.-C. and Shah, S.P. (1996). Strain softening of concrete in compression under different end constraints. Magazine of Concrete Research 48(175), 103–115.
Jia, Z. and Shah, S.P. (1994). Two-dimensional electronic speckle pattern interferometry and concrete fracture processes. Experimental Mechanics 34(3), 262–270.
Landis, E.N., Nagy, E.N., Keane, D.T. and Shah, S.P. (1996). Observations of internal crack growth in mortar using X-ray microtomography. 2nd International Conference on Nondestructive Testing of Concrete in the Infrastructure. Nashville, TN, pp. 54–59.
Li, Z. and Shah, S.P. (1994). Localization of microcracking in concrete under uniaxial tension. ACI Materials Journal 91(4), 372–381.
Li, Z., Kulkarni, S.M. and Shah, S.P. (1993). New test method for determining post-peak response of concrete under uniaxial tension. Experimental Mechanics 33(3), 181–188.
Shah, S.P., Swartz, S.E. and C. Ouyang (1995). Fracture Mechanics of Concrete: Applications of Fracture Mechanics to Concrete, Rock and Other Quasi-Brittle Materials. John Wiley and Sons, Inc., New York, p. 552.
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Shah, S., Choi, S. Nondestructive Techniques for Studying Fracture Processes in Concrete. International Journal of Fracture 98, 351–359 (1999). https://doi.org/10.1023/A:1018620008780
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DOI: https://doi.org/10.1023/A:1018620008780