Approximate J Estimates for Circumferential Cracks in between Elbows and Attached Pipes

Tae Kwang Song; Chang Kyun Oh; Yun Jae Kim; Jong Sung Kim; Tae Eun Jin

doi:10.4028/www.scientific.net/KEM.345-346.521

Paper Titles

Microstructure and Bonding Strength in Overlaying of Stellite 6 Alloy on Spheroidal Graphite Cast Iron by Plasma Transferred Arc Process
p.505

Effects of Notch Tip Geometry on the Cleavage Fracture of RPV Steel
p.509

Development of Toughness Scale Diagram Considering Temperature Dependency
p.513

Effect of Local Wall Thinning on Maximum Load Carrying Capacities of Elbows under Bending
p.517

Approximate J Estimates for Circumferential Cracks in between Elbows and Attached Pipes
p.521

Damage Analysis and Limit Tending Design of Thrust Bearing in esPCP System
p.525

Effect of Temperature and Specimen Thickness on Toughness of Nickel Alloy 22
p.529

Connection among the Characteristics of the Low Cycle Fatigue, High Cycle Fatigue and Fatigue Crack Growth
p.533

Extending Creep and Superplasticity to Materials with Submicrometer Grain Sizes
p.539

HomeKey Engineering MaterialsKey Engineering Materials Vols. 345-346Approximate J Estimates for Circumferential Cracks...

Approximate J Estimates for Circumferential Cracks in between Elbows and Attached Pipes

Abstract:

The present work proposes a method for elastic-plastic fracture mechanics analysis of the circumferential through-wall crack in between elbows and attached straight pipes, subject to in-plane bending. Based on small strain finite element limit analyses, closed-form limit load solutions are given first. Then applicability of the reference stress based method to approximately estimate J is proposed. One interesting finding is that a popular approach to assume that the crack locates in the straight pipe could lead to significantly different assessment results.