About a new experimental method of identification of the dynamic toughness of materials
Résumé
A new experimental method has been developped to evalutate dynamic toughness of brittle materials. This approach is based on invariance properties of an integral and is applied to a Kolsky Bar apparatus. This method allows also mixed mode loading to investigate dynamic fracture criteria including mixity. Moreover a technique of dual treatment gives precious information to validate all the assumptions made to analyse the experiments. Some results on PMMA and commercial glass are presented to illustrate this method.
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