Effective Toughness of Heterogeneous Materials with Rate-Dependent Fracture Energy.
@article{Albertini2021EffectiveTO, title={Effective Toughness of Heterogeneous Materials with Rate-Dependent Fracture Energy.}, author={Gabriele Albertini and Mathias Lebihain and François Hild and Laurent Ponson and David S. Kammer}, journal={Physical review letters}, year={2021}, volume={127 3}, pages={ 035501 } }
We investigate the dynamic fracture of heterogeneous materials experimentally by measuring displacement fields as a rupture propagates through a periodic array of obstacles of controlled fracture energy. Our measurements demonstrate the applicability of the classical equation of motion of cracks at a discontinuity of fracture energy: the crack speed jumps at the entrance and exit of an obstacle, as predicted by the crack-tip energy balance within the brittle fracture framework. The speed jump…
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