TY - JOUR
T1 - Effect of welded mechanical heterogeneity on local stress and strain ahead of stationary and growing crack tips
AU - Xue, He
AU - Ogawa, Kazuhiro
AU - Shoji, Tetsuo
N1 - Funding Information:
This work was supported by the PEACE III program jointly organized by the Fracture and Reliability Research Institute in Tohoku University, the Electric Power Research Institute, Hitachi Ltd., The Japan Atomic Power Company, The Kansai Electric Power Co. Inc., Mitsubishi Heavy Industries, Ltd., the Swedish Nuclear Power Inspectorate, Tohoku Electric Power Co. Inc., Tokyo Electric Power Company, and the Toshiba Corporation Ishikawajima—Harima Heavy Industries Co., Ltd. And He Xue also wishes to acknowledge the financial support of China National Natural Science Foundation through Grant 50875207.
PY - 2009/4
Y1 - 2009/4
N2 - The crack tip stress and strain condition is one of main factors affecting environmentally assisted cracking (EAC) behaviors in light water reactor (LWR). The mechanical and material properties of the base metal, weld metal and heat-affected zone (HAZ) in welded joints are heterogeneous because of the inherent characteristics of welded joint. Since the welded joint is more susceptible to EAC, to understand the effect of the strength mismatch in the welded joint on EAC growth rate, the stress and strain state in both stationary and growing crack tips of the welded joint specimen are investigated by the elastic-plastic finite element method (EPFEM) in this paper. The results indicate that the strength mismatch and sampling position in the welded joint would observably affect the stress and strain ahead of the stationary and growing crack tip, and accordingly affect the EAC growth rate.
AB - The crack tip stress and strain condition is one of main factors affecting environmentally assisted cracking (EAC) behaviors in light water reactor (LWR). The mechanical and material properties of the base metal, weld metal and heat-affected zone (HAZ) in welded joints are heterogeneous because of the inherent characteristics of welded joint. Since the welded joint is more susceptible to EAC, to understand the effect of the strength mismatch in the welded joint on EAC growth rate, the stress and strain state in both stationary and growing crack tips of the welded joint specimen are investigated by the elastic-plastic finite element method (EPFEM) in this paper. The results indicate that the strength mismatch and sampling position in the welded joint would observably affect the stress and strain ahead of the stationary and growing crack tip, and accordingly affect the EAC growth rate.
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U2 - 10.1016/j.nucengdes.2008.12.024
DO - 10.1016/j.nucengdes.2008.12.024
M3 - Article
AN - SCOPUS:61649093531
SN - 0029-5493
VL - 239
SP - 628
EP - 640
JO - Nuclear Engineering and Design
JF - Nuclear Engineering and Design
IS - 4
ER -