Internal crack growth simulation using S-version FEM

Masanori Kikuchi, Shinya Yamada, Ryosuke Serizawa, Li Yulong

科研成果: 书/报告/会议事项章节会议稿件同行评审

2 引用 (Scopus)

摘要

In nuclear power plant, there is a proximity rule to evaluate multiple inner cracks [1]. Inner cracks are generated inside of the structure in different manners. There are many parameters which affects the growing processes of inner cracks. They are ; locations, slant angles, aspect ratio of each inner crack and distances between adjacent inner cracks. When multiple inner cracks are detected, proximity rules are proposed. But due to the complexity of the problem, it is necessary to verify proposed proximity rules. But experimental study is very difficult due to existence of many parameters, and crack growth occurs inside of the structure. Numerical simulation is needed for this purpose. This problem is simulated using S-version FEM [2]. Using S-FEM, inner crack is modeled independently from global structure, and crack growth is easily simulated. In maintenance code of nuclear power plant, initial defects are modeled as elliptical cracks in a normal plane to tension loading direction, and growth rate is estimated on this plane. But by using S-FEM, realistic defect shape is modeled, and crack growth by fatigue is simulated. Usually, such small defects are subjected to multi-axial loading, and crack growth behaviors are very complicated. Finally, detect shape becomes elliptical or circular crack in a plane normal to tension loading direction in the structure. Fatigue cycles for these growing processes are calculated, and conservativeness of this maintenance code is discussed. Parametric studies are conducted for this problem, and proximity rules are verified with numerical results.

源语言英语
主期刊名Codes and Standards
出版商American Society of Mechanical Engineers (ASME)
ISBN(电子版)9780791845981
DOI
出版状态已出版 - 2014
活动ASME 2014 Pressure Vessels and Piping Conference, PVP 2014 - Anaheim, 美国
期限: 20 7月 201424 7月 2014

出版系列

姓名American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
1
ISSN(印刷版)0277-027X

会议

会议ASME 2014 Pressure Vessels and Piping Conference, PVP 2014
国家/地区美国
Anaheim
时期20/07/1424/07/14

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