Abstract
An experimental investigation is conducted on the two-dimensional punch problem for isotropic materials and unidirectional fiber-reinforced composite materials under quasi-static and impact loading. Singular stresses are generated in the specimen near the punch corners, and the stress intensity factorK Iis introduced to describe the singular stress field. Laser interferometry is used to measure in-plane stresses (transmission mode) and out-of-plane displacements (reflection mode) and then estimate the stress intensity factor. In the dynamic case, a high-speed photography technique was employed to capture the transient response of the specimen and measureK(t) just after the impact. In all the cases, a good agreement between the measurements ofK and theoretical predictions was found.
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Rubio-Gonzalez, C., Mason, J.J. Experimental investigation of dynamic punch tests on isotropic and composite materials. Experimental Mechanics 41, 129–139 (2001). https://doi.org/10.1007/BF02323188
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DOI: https://doi.org/10.1007/BF02323188