Stress analysis of anisotropic thick laminates in cylindrical bending using a semi-analytical approach

Semi-analytical elasticity solutions for bending of angle-ply laminates in cylindrical bending are presented using the state-space-based differential quadrature method (SSDQM). Partial differential state equation is derived from the basic equations of elasticity based on the state space concept. Then, the differential quadrature (DQ) technique is introduced to discretize the longitu- dinal domain of the plate so that a series of ordinary differential state equations are obtained at the discrete points. Meanwhile, the edge constrained conditions are handled directly using the stress and displacement components without the Saint-Venant principle. The thickness domain is solved analytically based on the state space formalism along with the continuity conditions at interfaces. The present method is validated by comparing the results to the exact solutions of Pagano’s problem. Numerical results for fully clamped thick laminates are presented, and the influences of ply angle on stress distributions are discussed.     

含加载孔层合板的破坏分析

提出一种计算含单个加载孔层合板的破坏荷载和破坏类型的方法,该方法假定特征曲线为：ｒｃ（θ）＝Ｒ＋Ａｏｔ＋（Ａｏｃ－Ａｏｔ）ｓｉｎθ,在加载孔边和特征曲线之间求平均应力,应用Ｙａｍａｄａ－Ｓｕｎ强度准则求出破坏荷载和破坏类型,对Ｔ３００／ＳＰ２８６材料分析表明：本方法与实验结果吻合较好,并且比Ａｇａｒｗａｌ Ｂ．Ｌ．的方法具有更高的精度。     

复合材料叠层板非线性动力稳定性理论的几个基本问题

本文研究了复合材料叠层板在周期性动力谐载荷作用下的非线性动力稳定性理论中的几个基本问题。其内容包括：用Hamilton原理建立一般性基本方程,考虑了大挠度非线性;惯性力的影响;耦合效应影响,横向剪切效应的影响,以及几何初始缺陷困数等。     

层板复合材料疲劳性能实验数据的处理

介绍了基于VB6．0设计的层板复合材料疲劳性能实验数据处理的可视化通用程序。借助于该程序，可以快速有效地处理层板复合材料疲劳性能实验的大量数据，并在得到很好的数据处理效果的同时实现了参数估计、初始刚度、初始静强度、疲劳剩余刚度及疲劳寿命统计分布曲线绘制的可视化。