Influence of PEG treatment on fracture of wood under mixed mode loading
Sato Kiyoshi; Yamamoto Hisato; Takagi Yuuji
Abstract:The objective of this study was to determine the effect of polyethylene glycol (PEG) treatment on the fracture of wood under mixed mode loading. Specimens were cut from commercially dried western hemlock, Douglas fir, agathis, spruce and Japanese cypress lumbers, and some of them were treated by PEG-4000. The experimental results were compared with various fracture criteria hitherto proposed in literatures. The fracture criteria experimentally obtained for solid and PEG treated woods do not follow any of these criteria. The fracture criterion obtained for PEG treated wood is different from one obtained for solid wood. The values of KII at Mode II fracture obtained experimentally for PEG treated wood are smaller than one obtained for solid wood. Key Words:mixed mode loading, Fracture criterion, Solid wood, PEG treated wood, CTS specimen