三点曲げを受ける積層はりの支持点中央に位置する界面はく離の進展解析

抄録

Delamination or interfacial cracking in a two-layer laminated beam subjected to three-point bending is analyzed. The initial partial debonding is assumed to locate at the center of the beam and to symmetrically spread toward both ends along the bond-line. The compliance and energy release rate are derived on the basis of an elementary beam theory. The results are shown to compare well with those based on the finite-element method. It is also shown that the delamination process is generally of a mixed-mode type; i. e., both mode I and II deformation near the crack tips contribute to the cracking process.