The Ultimate Stress of Small Grain Shellproof Ceramic Composite

摘要：

　　According to the microstructures of small grain shellproof ceramic composite,the effective self-consistent method is used to determine the effective stress field of the shellproof ceramic composite.Based on the effective stress field and fracture feature of small grain shellproof ceramic composite,considering the mechanism of growth and coalescence of microvoids,crack nucleation model of the shellproof ceramic composite is built.Under the effect of sheafing stress,dislocations slip along slip plane and pile up in matrix grain boundary.Owing to the stress concentration before leading dislocation,there is a stress field around the stress concentration.Letting the maximum tensile stress equal to the theoretic fracture strength of composite matrix,the ultimate stress of small grain shellproof ceramic composite is obtained.

关键词： Ultimate stress small grain shellproof ceramic composite Effective stress field Mechanism of growth and coalescence of microvoids, Crack nucleation model, Dislocation pile-up model

作者: Qiongxi LIU Jianfeng YANG

作者单位: School of Material Science & Engineering, Xian Jiaotong University, Xian, 710049,China

会议类型: 国际会议

会议名称: the Second International Conference on Frontiers of Manufacturing and Design Science(第二届制造与设计科学国际会议(ICFMD 2011))

会议地点: 台湾

会议语种:英文

页码: 524-528

在线出版日期: 2011-12-11（万方平台首次上网日期，不代表论文的发表时间）