复合材料层合结构整体┐局部有限元素法

GLOBAL LOCAL FINITE ELEMENT METHOD FOR LAMINATED COMPOSITE STRUCTURES

提出一个精确分析复合材料层合结构应力的整体－局部有限元素法．首先，采用分区直线模型的子单元法，计算整个层合结构的位移和应力．然后，在应力计算精度要求较高的局部区域内，以子单元法计算所得节点位移为基础，以应力参数为基本未知量，利用修正余能原理，进一步精确分析该局部区域的应力．计算表明。

A global local finite element method for laminated composte structures is presented.The displacements and stresses of whole laminated composite structures are calculated by subelement method based on the displacement hypothesis of sectionalized straight lines.The further accurate analysis based on a modified complementary energy principle,which takes the calculated node displacements as the basis and the stress parameters as the fundamental unkown quantilies,is carried out in some particular regions reguired high precision in strsses.Example problems demonstrate the high computation accurary for stress of laminated composite structure.