Abstract
Fracture under mixed Modes I and II was investigated experimentally on MDF (medium density fiberboard) and DuPont Corian. The experimental results were compared with various fracture criteria hitherto proposed in the literature. The fracture criterion obtained for MDF follows approximately the criterion by Amestoy et al., and the one obtained for DuPont Corian follows approximately the maximum stress criterion and the criterion by Amestoy et al. On the other hand, the direction of crack growth obtained for MDF and DuPont Corian do not follow any of these criteria.
