COMPUTATIONAL SIMULATION FOR CREEP FRACTURE PROPERTIES TAKING MICROSCOPIC MECHANISM INTO ACCOUNT

机译：考虑微观机理的蠕变断裂特性的计算模拟

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Relationship between creep crack growth rate and microscopic fracture mechanism i.e., wedge-type intergranular, transgranular and cavity-type intergranular crack growth, has been investigated. The growth rate of wedge-type and transgranular creep crack could be characterized by creep ductility. Creep damages formed ahead of the cavity-type crack tip accelerated the crack growth rate. Based on the experimental results, FEM code that simulates creep crack growth has been developed by taking the fracture mechanism into account. The effect of creep ductility and void formation ahead of the crack tip on creep crack growth behavior could be simulated.

机译：研究了蠕变裂纹扩展速率与微观断裂机理之间的关系，即楔形，晶间和腔型晶间裂纹扩展。楔形和跨晶蠕变裂纹的生长速率可以用蠕变延性来表征。在型腔裂纹尖端之前形成的蠕变损伤加快了裂纹的生长速度。根据实验结果，通过考虑断裂机理，开发了模拟蠕变裂纹扩展的FEM代码。可以模拟蠕变延性和裂纹尖端之前的空隙形成对蠕变裂纹扩展行为的影响。

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来源
《The 3rd International Symposium on Material Chemistry in Nuclear Environment (Material Chemistry '02 MC'02) Mar 13-15, 2002 Tsukuba》|2002年|p.336-343|共8页
会议地点 Tsukuba(JP);Tsukuba(JP);Tsukuba(JP)
作者
Masaaki Tabuchi;
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作者单位

National Institute for Materials Science, Sengen, Tsukuba, 305-0047, Japan;

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会议组织
原文格式 PDF
正文语种 eng
中图分类原子能技术;
关键词
creep crack growth; alloy 800H; 316 stainless steel; creep fracture mechanism; C~* parameter; FEM analysis; vacancy diffusion;

机译：蠕变裂纹扩展；合金800H； 316不锈钢；蠕变断裂机理； C〜*参数；有限元分析；空位扩散;

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COMPUTATIONAL SIMULATION FOR CREEP FRACTURE PROPERTIES TAKING MICROSCOPIC MECHANISM INTO ACCOUNT

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