摘要
本文根据非局部弹性理论推导了陶瓷材料的裂纹扩展准则。理论推导表明用非局部理论推导的裂纹扩展临界应力与临界裂纹长度都要比用线弹性断裂理论（ＬＥＦＭ）推导出来的大得多。用热压氮化硅（ＨＰ－Ｓｉ３Ｎ４）陶瓷材料在室温下做裂纹扩展实验，实验结果与理论推导吻合得较好。
Criteria for crack propagation of ceramic materials are deduced from nonlocal elasticity theory in this paper. The theoretical deduction shows that the critical stress of crack propagation and critical crack length deduced from nonlocal theory are much greater than those deduced from LEFM. The results of crack propagaiton tests made on HP-Si 3N 4 at room temperature coincide well with the theoretical deduction.
出处
《硅酸盐通报》
CAS
CSCD
1997年第2期13-15,20,共4页
Bulletin of the Chinese Ceramic Society
基金
国家建材局行业基金资助
关键词
非局部弹性理论
裂纹扩展
陶瓷材料
nonlocal elasticity theory, crack propagation, ceramic material
