三表面割口单向叠层板的应力集中分析

The Stress Concentration for Triple Surface Notched Laminates

为了揭示多个表面割口单向纤维增强复合材料叠层板的拉伸破坏机理,预估其破坏规律,基于剪滞理论,建立一种对各单层分划为有限子单元的剪滞分析模型,分析含三个平行的表面割口单向叠层板在拉伸载荷作用下的应力重新分布及各割口之间的相互影响问题,获得了表面割口附近完整纤维的应力集中因子、应力及位移分布规律.

In order to reveal the tensile failure mechanism and to predict the destroy rule of the multisurface notched composite laminates, a shear-lag model that each lamina in laminate is divided into finite sub-elements was set up on the basis of the shear-lag theory. As a result, the stress redistributions and the influence between each notch for three parallel surface notched unidirectional laminates under tension were analyzed, the stress concentration factors in intact fibers at root of the surface notch and the stress and the rule of the displacement distributing were obtained.