割口正交叠层板的应力集中及强度(英文)

Study on Stress Concentrations and Strengths of Notched Cross-ply Laminates

建立一种分层剪滞模型,研究了含割口的正交叠层板在拉伸载荷作用下的应力重新分布问题,获得了割口前缘完整纤维的应力集中因子。在此基础上,采用复合材料的细观统计破坏理论,研究了割口正交叠层板的拉伸破坏强度,得到与现有实验较吻合的结果。

The stress redistributions for notched cross-ply laminates under tension were analyzed by establishing a layering shear-lag model, from which the stress concentration factors in intact fibers at the root of the notch were obtained. On the basis of these stress redistributions found, the tensile strengths of notched cross-ply laminates were studied by using a statistical fracture theory. The present results have a relatively good agreement with the existing experimental values.