Two-dimensional analyses of delamination buckling of symmetrically cross-ply rectangular laminates  

作　　者：薛江红 罗庆姿 韩峰 刘人怀 

机构地区：[1]Department of Mechanics and Civil Engineering,Jinan University [2]Key Lab of Disaster Forecast and Control in Engineering,Ministry of Education [3]Beijing Institute of Technology,State Key Laboratory of Explosion Science and Technology

出　　处：《Applied Mathematics and Mechanics(English Edition)》2013年第5期597-612,共16页应用数学和力学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.11172113,11032005,and 11072037)

摘　　要：The conventional approach to analysis the buckling of rectangular laminates containing an embedded delamination subjected to the in-plane loading is to simplify the laminate as a beam-plate from which the predicted buckling load decreases as the length of the laminate increases. Two-dimensional analyses are employed in this paper by extending the one-dimensional model to take into consideration of the influence of the delamination width on the buckling performance of the laminates. The laminate is simply supported containing a through width delamination. A new parameterβ defined as the ratio of delamination length to delamination width is introduced with an emphasis on the influence of the delamination size. It is found that （i） when the ratio β is greater than one snap-through buckling prevails, the buckling load is determined by the delamination size and depth only; （ii） as the ratio β continues to increase, the buckling load will approach to a constant value. Solutions are verified with the well established results and are found in good agreement with the latter.The conventional approach to analysis the buckling of rectangular laminates containing an embedded delamination subjected to the in-plane loading is to simplify the laminate as a beam-plate from which the predicted buckling load decreases as the length of the laminate increases. Two-dimensional analyses are employed in this paper by extending the one-dimensional model to take into consideration of the influence of the delamination width on the buckling performance of the laminates. The laminate is simply supported containing a through width delamination. A new parameterβ defined as the ratio of delamination length to delamination width is introduced with an emphasis on the influence of the delamination size. It is found that （i） when the ratio β is greater than one snap-through buckling prevails, the buckling load is determined by the delamination size and depth only; （ii） as the ratio β continues to increase, the buckling load will approach to a constant value. Solutions are verified with the well established results and are found in good agreement with the latter.

关 键 词：two-dimensional analysis rectangular laminate DELAMINATION BUCKLING laminate theory 

分 类 号：O344.1[理学—固体力学]