首页 | 本学科首页   官方微博 | 高级检索  
     


Constraint‐corrected J–R curve based on three‐dimensional finite element analyses
Authors:Y. Huang  W. Zhou  E. Wang
Affiliation:Department of Civil and Environmental Engineering, Western University, , London, Ontario, Canada, N6A 5B9
Abstract:
Three‐dimensional (3D) finite element analyses are carried out on single‐edge bend [SE(B)] specimens for which the J‐integral resistance curves (J–R curves) have been experimentally determined to develop the constraint‐corrected J–R curves for the X80 grade pipe steel. The constraint parameters considered in this study include QHRR, QSSY, QSSY_m, QLM, QBM1, QBM2, A2, h and Tz. The constraint‐corrected J–R curves were developed on the basis of the constraint parameters obtained from finite element analysis and experimentally determined J–R curves associated with deeply cracked and medium‐cracked SE(B) specimens and validated against shallow‐cracked SE(B) specimens. The analysis results indicate that all the constraint parameters considered in this study except QHRR, QSSY, QSSY_m and QLM lead to reasonably accurate constraint‐corrected J–R curves if the crack extensions are relatively small (≤0.7 mm). For larger crack extensions (≤1.5 mm), the QBM1‐based constraint‐corrected J–R curve leads to the most accurate predictions of J among all the constraint parameters considered.
Keywords:crack‐tip constraint  finite element analysis (FEA)  fracture toughness  J–  R curve  single‐edge bend [SE(B)]  three‐dimensional (3D)
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号