Creep crack initiation prediction considering constraint effect for pressurized pipelines with circumferential surface cracks

2018 ◽  
Vol 41 (9) ◽  
pp. 1900-1917 ◽  
Author(s):  
D. Wu ◽  
H. Jing ◽  
L. Xu ◽  
L. Zhao ◽  
Y. Han
Keyword(s):  
Crack Initiation ◽  
Surface Cracks ◽  
Constraint Effect ◽  
Creep Crack ◽  
Pressurized Pipelines

Characterization of creep crack-tip constraint levels for pressurized pipelines with axial surface cracks

2017 ◽  
Vol 114 ◽  
pp. 98-109 ◽  
Author(s):  
Lianyong Xu ◽  
Xingfu Zhang ◽  
Lei Zhao ◽  
Yongdian Han ◽  
Hongyang Jing
Keyword(s):  
Crack Tip ◽  
Surface Cracks ◽  
Creep Crack ◽  
Pressurized Pipelines ◽  
Crack Tip Constraint ◽  
Axial Surface

Correlation Analysis Between Time-Dependent Creep Crack-Tip Stress and Constraint Effect on Creep Crack Initiation Time

2020 ◽  
Author(s):  
Seung-Ho Lee ◽  
Hyun-Woo Jung ◽  
Yun-Jae Kim ◽  
Kamran Nikbin ◽  
Robert A. Ainsworth
Keyword(s):  
Crack Initiation ◽  
Correlation Analysis ◽  
Creep Crack Growth ◽  
Crack Tip ◽  
Compact Tension ◽  
Time Dependent ◽  
Initiation Time ◽  
Constraint Effect ◽  
Creep Crack ◽  
Crack Tip Stress

Abstract In this study, to qualify the constraint effect on creep crack initiation, the correlation analysis between proposed constraint parameter Q’ using time-dependent creep crack-tip stress and creep crack initiation time variable Ai was performed. Ai implies the influence of constraint effect on creep crack initiation. The procedure to calculate the Ai and the Q’-parameter was presented. To evaluate various status of constraint effect, creep crack growth tests for twenty-one compact tension specimens of Type 316H stainless steel at 550°C were investigated. The results of correlation analysis explain the reason for the different initiation time at the same C* level in respect of constraint effect.

Investigation on creep crack initiation prediction considering constraint effect using constraint parameter Q

2018 ◽  
Vol 96 ◽  
pp. 631-641 ◽  
Author(s):  
Dongquan Wu ◽  
Hongyang Jing ◽  
Lianyong Xu ◽  
Lei Zhao ◽  
Yongdian Han
Keyword(s):  
Crack Initiation ◽  
Constraint Effect ◽  
Creep Crack

Analysis of the constraint levels and the creep crack initiation times for pressurized pipes with long surface cracks

2020 ◽  
Vol 153 ◽  
pp. 106787
Author(s):  
Dongquan Wu ◽  
Lianyong Xu ◽  
Wei Zhai ◽  
Hongyang Jing ◽  
Lei Zhao ◽  
...  
Keyword(s):  
Crack Initiation ◽  
Surface Cracks ◽  
Creep Crack
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