Mode I delamination R-Curve in poplar laminated veneer lumber
Résumé
Recent studies have shown that plywood and laminated veneer lumber are very efficient crashworthiness materials. Therefore, there is a need to determine the fracture toughness of these wood composite materials to be able to model their static and dynamic damage behavior. This study reports the results of the delamination propagation of plywood under mode I loading. Two different double cantilever beam specimens made of poplar were compared: one with an interfacial fiber orientation of 0°/0° and the second with 0°/90°. Failure scenarios and patterns are analyzed to establish a comparison between the two configurations and compute consistent R-curves.
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