含孔复合材料层合板在压缩载荷下的三维逐渐损伤

通过逐渐损伤分析可以清楚地了解承载复合材料层合板内部损伤的产生及扩展过程,应用三维逐渐累积损伤理论和有限元分析技术,对不同材料不同宽孔比的含孔复合材料层合板在压缩载荷作用下的逐渐破坏过程进行分析,综合考虑了基体开裂、基纤剪切、分层及纤维断裂等四种复合材料层合板的主要破坏模式。在通用有限元分析软件ANSYS基础上进行二次开发,编制了参数化的分析模拟程序,该程序可以预测任意铺层角度和铺层厚度层合板在压缩载荷作用下的逐渐损伤破坏过程及最终失效载荷,通过与已有参考文献结果进行比较,验证了方法及程序的正确性。该程序可以较大程度地提高最终失效载荷的预测精度,为复合材料层合板结构的设计和使用提供了有力的技术支持。

THREE-DIMENSIONAL PROGRESSIVE DAMAGE OF LAMINATED COMPOSITES WITH A HOLE UNDER COMPRESSIVE LOADING

The damage initiation and development of laminated composites can be simulated by progressive damage analysis. A 3D progressive damage model and finite element method are used to analyze the damage process of laminated composites with a hole under compressive load. The matrix-cracking, fiber-matrix shear, delamination, and fiber breakage are all con- sidereal. Based on the software of ANSYS, a parametric modeling program is developed to predict the progressive damage process and ultimate strength of laminated composites with any layer direction angle and layer thickness. The validity of the analysis method and program is proved by the comparison between the predicted result and experimental data available in the literature. The predicted precision of ultimate strength may be improved by the program, which provides technical support for the design and use of laminated composites.