期刊
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
卷 159, 期 -, 页码 35-44出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijpvp.2017.11.006
关键词
Ductile crack growth simulation; Finite element damage analysis; GTN model; Parameter calibration; Through-wall cracked pipe
资金
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [NRF-2017R1A2B2009759]
- Nuclear Power Core Technology Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry & Energy, Republic of Korea [20141520100860]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20141520100860] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2017R1A2B2009759] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This paper presents ductile fracture simulation using the GTN (Gurson-Tvergaard-Needleman) model of through wall cracked STPT410 carbon steel pipe test under pure bending. Three issues related to practical application are addressed; (i) how to determine the parameters in the GTN model from fracture toughness data, (ii) how to incorporate the element-size effect to the GTN model and (iii) the effect of the crack-tip mesh design on determination of the GTN model parameters. It is found that determined values of the parameters depend on the crack-tip mesh design and the finite element size used in simulation. The split of the crack tip element into two makes parameter determination easier and gives better simulation results, but is difficult to apply to threedimensional surface crack problems.
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