含矩形边缘分层缺陷层合板的压缩性能

对含矩形边缘分层缺陷层合板的压缩性能进行试验研究和理论分析, 考察了层合板厚度(含铺层形式)、 分层位置、 形状、 面积以及环境等因素对压缩强度的影响, 并采用分层扩展以及软化夹杂两种模型对含分层层合板的压缩强度进行了计算和破坏机理分析。结果表明: 厚板对边缘分层缺陷不敏感, 中等厚度和薄层合板比较敏感; 缺陷的位置和形状对层合板压缩强度有一定的影响; 湿热环境改变了含缺陷板的压缩破坏机理, 并对中等厚度板和薄板的压缩强度有明显的影响。两种模型中软化夹杂模型效果较好, 可用于工程设计计算。 

Study on compressive properties of composite laminates with edge rectangular delamination defect

Experimental studies and theoretical analysis on compressive properties of composite laminates with the edge rectangular delamination defect were carried out.The influence of laminate thickness(including stacking sequences),delamination location,shape,area and environment on the compressive strength was discussed.Both the delamination developing model and the soft inclusion model were used to estimate the compressive strength of laminates with delamination and to analyze the failure mechanism.The results show that medium thick laminates and thin laminates are sensitive to the edge delamination defect,while thick laminates are not.The defect location and shape have a certain effect on the laminate compressive strength.The hygrothermal environment not only changes the compressive mechanism of laminates with defect,but also affects the compressive strength of medium and thin laminates.The soft inclusion model is much more effective and can be used in engineering design analysis.