复合材料层板边缘效应的准相似元解法

用准相似单元法研究了复合材料层板直边和孔边的自由边缘效应，得到了一些具有工程意义的结果。准相似单元法是相似单元法的推广，利用这一方法可以求解三维的应力集中问题，避免了求单刚时的重复计算。由于采用了按相似层求解的技术，应用准相似单元法求解应力集中问题时对计算机容量的要求大为降低

Some results on edge effects in composite laminates by quasi similar finite element method

In this paper the edge effects in composite laminates has been studied with the quasi similar finite element method.Some new results has been drawn.Fomula for the simplified computation of the mixed hybrid element stiffness matrix has been dirived.For the usually used displacement models,the formula can be discussed in the same way.By means of the quasi similer element mothed,the problem of stress concentrations can be solved effictively.The computer memory size asked for the method is small because that the computation of the converse metrix can been avoided.the numerical examples givin in this paper show that the method has a good behavior,a few conclusion are got about inter laminates stress at the free edges around a hole in composite laminates,and that may be valuable in engineering.