TY - GEN
T1 - A method of J testing based on crack opening displacement for circumferential through-wall cracked pipes under combined tension and bending
AU - Huh, Nam Su
AU - Stumpfrock, Ludwig
AU - Roos, Eberhard
AU - Kim, Yun Jae
AU - Kim, Young Jin
PY - 2006
Y1 - 2006
N2 - Application of the leak-before-break concept to nuclear piping requires accurate fracture mechanics assessment on pipes with postulated circumferential through-wall crack subject to combined tension and bending. One important element is determination of relevant J-resistance curve for pipes under combined loading. This paper provides experimental J estimation method for the circumferential through-wall cracked pipe under combined tension and bending, based on the load-crack opening displacement (COD) record to estimate J-resistance curve. To give confidence in the proposed method, the J results from detailed elastic-plastic finite element (FE) analysis are also compared with estimated J based not only on proposed method but also on conventional method using load-load line displacement, which shows that estimated J based on the proposed method provides reliable J estimates regardless of analysis condition, on the other hand, the conventional method using the load-load line displacement record gives erroneous results for shallow cracks.
AB - Application of the leak-before-break concept to nuclear piping requires accurate fracture mechanics assessment on pipes with postulated circumferential through-wall crack subject to combined tension and bending. One important element is determination of relevant J-resistance curve for pipes under combined loading. This paper provides experimental J estimation method for the circumferential through-wall cracked pipe under combined tension and bending, based on the load-crack opening displacement (COD) record to estimate J-resistance curve. To give confidence in the proposed method, the J results from detailed elastic-plastic finite element (FE) analysis are also compared with estimated J based not only on proposed method but also on conventional method using load-load line displacement, which shows that estimated J based on the proposed method provides reliable J estimates regardless of analysis condition, on the other hand, the conventional method using the load-load line displacement record gives erroneous results for shallow cracks.
KW - Circumferential through-wall cracked pipe
KW - Combined tension and bending
KW - Crack opening displacement
KW - J testing
KW - Plastic η-factor
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U2 - 10.4028/3-908451-15-9.63
DO - 10.4028/3-908451-15-9.63
M3 - Conference contribution
AN - SCOPUS:36049011271
SN - 3908451159
SN - 9783908451150
T3 - Solid State Phenomena
SP - 63
EP - 70
BT - Advances in Safety and Structural Integrity 2005 - Proceedings of the International Symposium on Safety and Structural Integrity
PB - Trans Tech Publications Ltd
T2 - International Symposium on Safety and Structural Integrity
Y2 - 17 January 2005 through 20 January 2005
ER -