直交積層板の層内割れ損傷理論と有限要素法への応用

概要

論文の詳細を見る
This paper deals with a theory of ply-cracking damage on 90° and 0° plies in cross-ply laminate and its application to finite element method. An energy approach is extended to predict the initiation and evolution of ply-cracking damage on 90° and 0° plies and the corresponding nonlinear stressstrain behavior of the cross-ply laminate under multi-axial in-plane loading. In this approach, the stress and strain conditions for the progressive damage are determined by equating the decrease in potential energy to the released energy, where the former and latter are estimated from the stiffness reduction due to ply-cracking damage and from the mixed-mode critical energy release rate for cracking of unidirectional ply, respectively. This approach provides us with the constitutive relation of cross-ply laminates including the progressive ply-cracking damage. This theory is applied to the finite element method in order to analyze the ply-cracking damage and stress/strain distributions of the structures made of cross-ply laminates. As an example, finite element analysis is carried out on the seven kinds of CFRP cross-ply laminates with a circular hole. The numerical results show that the transverse cracking damage in 90° ply is widely spread out on the ligament of the plate, and the splitting damage in 0° ply extends in the longitudinal direction from the edge of the hole. The details of the damage evolution around a circular hole in CFRP cross-ply laminate dapend on the stacking lay-up.
社団法人日本機械学会の論文
1999-11-25

直交積層板の層内割れ損傷理論と有限要素法への応用

スポンサーリンク

概要

著者

関連論文

スポンサーリンク