New experimental techniques for dynamic crack localization
DOI:
https://doi.org/10.13052/EJCM.18.255-283Keywords:
dynamic fracture, mixed mode loading, crack localization, digital image correlation, crack arrest and restartAbstract
The determination of relevant constitutive crack propagation laws under dynamic loading is a rather challenging operation. In dynamic impact cases, the variations of propagation parameters and exact crack positions are difficult to control. This paper focuses on different techniques for measuring accurate crack tip position histories in dynamic crack propagation experiments. Two different methods are considered: very accurate crack tip localization by optical displacement sensors is first described for transparent materials; then, an automatic method based on digital image correlation is presented for crack localization in all brittle materials whatever their opacity.
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