期刊
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
卷 88, 期 10, 页码 434-447出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijpvp.2011.07.006
关键词
Ductile fracture simulation; Experimental validation; Finite element analysis; Stress-modified fracture strain
资金
- Engineering Research Center [2009-0063170]
- Korea Science & Engineering Foundation
- New & Renewable Energy of the Korea Institute of Energy Technology Evaluation and Planning [20101020300710]
- Korea government Ministry of Knowledge Economy
- Korea Evaluation Institute of Industrial Technology (KEIT) [20101020300710] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [핵C6A1108, 2007-0056656, 과C6A1802] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This paper provides experimental validation of the approach for simulating ductile failure using finite element methods, recently proposed by the authors. The proposed method is based on a phenomenological stress-modified fracture strain model. Incremental damage is defined by the ratio of the plastic strain increment to the fracture strain, and total damage is calculated using linear summation. When the accumulated damage becomes unity, all stress components at the finite element gauss point are reduced to a small value to simulate progressive failure. The proposed method is validated against four experimental data sets of cracked specimens made of three different materials. Despite the simplicity of the proposed method, the simulated results agree well with experimental data for all cases considered, providing sufficient confidence in the use of the proposed method to simulate ductile failure. (C) 2011 Elsevier Ltd. All rights reserved.
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