Délaminage mode 1 et Il de composites a renfort tissu sollicites a faibles et grandes vitesses

(Reçu le 30 avril 1990, révisé le 29 octobre 1990, accepté le 15 janvier 1991)

Abstract
The influence of the loading rate on delamination of Mode I and Mode II of two composites materials with woven glass reinforcements provided by VETROTEX company has been studied. These composites differ according to the nature of their resins, the DERAKANE 8084.05 being more soft than the DERAKANE 470.36 which is considered as rigid. The ductile nature of the resine provides an improvement in the crack initiation and propagation energies for small and high rates loading. This study has permitted the introduction of the interesting notion of the role of interfaces for the woven reinforcements. It also demonstrates the existence of a correlation between the behavior of each of these interfaces and the change of propagation and delamination energies for Mode I and II.