含椭圆分层损伤复合材料层合板分层前缘接触效应研究  

STUDY OF DELAMINATION FRONT CONTACT EFFECT OF COMPOSITE LAMINATES WITH ELLIPTICAL DELAMINATION

作　　者：孙先念[1] 陈浩然[1] 陈绍杰[2] 

机构地区：[1]大连理工大学工业装备结构分析国家重点实验室,大连116024 [2]沈阳飞机研究所,沈阳110035

出　　处：《复合材料学报》2000年第4期105-109,共5页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金!资助项目 (196 72 0 14 ) ;国家高等学校博士学科点专项科研基金!资助项目 (96 0 14 11)

摘　　要：采用基于 Mindlin一阶剪切理论的四节点板单元 ,分析了分层前缘闭合接触效应对含椭圆分层复合材料层合板前后屈曲行为的影响。通过在分层区域内引入虚杆单元来防止上、下子板发生相互重叠 ,并假设接触区内没有摩擦。结果表明 ,分层前缘的闭合接触效应受分层几何形状的影响很大 ,当椭圆分层子板的长轴与压缩载荷方向一致时 ,闭合接触效应对含分层层合板前后屈曲行为最大。A 4 node plate element based on Mindlin first order shearing theory is presented to analyze delamination front contact effect on pre buckling and post buckling behavior of composite laminates with elliptical delamination damage. Contact effect is analyzed by using gap element in the delamination region without friction being considered. The results show that delamination front contact effect is related to the aspect of elliptical delamination. Pre buckling and post buckling behaviors of composite laminates with delamination of which the major axis is consistent with the compressive load direction are affected significantly by the delamination front contact effect.

关 键 词：有限元法 分层损伤 复合材料层合板 接触效应 

分 类 号：TB330.1[一般工业技术—材料科学与工程] O241.82[理学—计算数学]