陈国鑫,尧军平,李步炜,梁超群,李怡然

• 1:南昌航空大学航空制造工程学院

摘要(Abstract)：

使用内聚力模型及有限元分析方法，在含实际形貌SiC_p颗粒增强AZ91D镁基复合材料有限元模型中引入孔隙缺陷。分析不同孔隙率对SiC_p/AZ91D复合材料在单轴压缩情况下的裂纹萌生及扩展的影响。结果表明：无孔隙的SiC_p/AZ91D复合材料裂纹萌生在颗粒尖角与基体交界处，含孔隙的复合材料在基体孔隙以及颗粒尖角与基体交界处均会萌生裂纹，复合材料的孔隙率越高，其抗压强度和屈服强度越低，断裂裂纹长度越长，孔隙率的增加使得复合材料的裂纹萌生和断裂的时间提前，加速了复合材料裂纹萌生扩展直至断裂。

关键词(KeyWords)： 内聚力模型;有限元分析;孔隙率;裂纹扩展;复合材料断裂

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52065046,51661024);; 江西省科技重点研发计划(20202BBEL53024)

作者(Author): 陈国鑫,尧军平,李步炜,梁超群,李怡然

DOI: 10.13289/j.issn.1009-6264.2023-0341

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