Effect of Crack Orientation and Residual Stress on Stress Intensity Factors of Butt-Welded Steel Joints
Elshrief, E., El-Megharbel, A., eldomiaty, A., abdelhafez, H. (2021). Effect of Crack Orientation and Residual Stress on Stress Intensity Factors of Butt-Welded Steel Joints. EKB Journal Management System, 25(2), 146-154. doi: 10.21608/pserj.2021.44187.1065
Eman Ahmed Elshrief; Abla El-Megharbel; Aly eldomiaty; Hassan abdelhafez. "Effect of Crack Orientation and Residual Stress on Stress Intensity Factors of Butt-Welded Steel Joints". EKB Journal Management System, 25, 2, 2021, 146-154. doi: 10.21608/pserj.2021.44187.1065
Elshrief, E., El-Megharbel, A., eldomiaty, A., abdelhafez, H. (2021). 'Effect of Crack Orientation and Residual Stress on Stress Intensity Factors of Butt-Welded Steel Joints', EKB Journal Management System, 25(2), pp. 146-154. doi: 10.21608/pserj.2021.44187.1065
Elshrief, E., El-Megharbel, A., eldomiaty, A., abdelhafez, H. Effect of Crack Orientation and Residual Stress on Stress Intensity Factors of Butt-Welded Steel Joints. EKB Journal Management System, 2021; 25(2): 146-154. doi: 10.21608/pserj.2021.44187.1065

Effect of Crack Orientation and Residual Stress on Stress Intensity Factors of Butt-Welded Steel Joints

Port-Said Engineering Research Journal
Article 14, Volume 25, Issue 2, September 2021, Pages 146-154    PDF (961.88 K)
Document Type: Original Article
DOI: 10.21608/pserj.2021.44187.1065
Authors
Eman Ahmed Elshrief* 1; Abla El-Megharbel2; Aly eldomiaty3; Hassan abdelhafez4
1Egypt - Portsiad
2Prod. Eng., Faculty of Engineering, Port Said University
3Mechanical engineering Department, Faculty of Engineering, Suez Canal University
4Production Engineering and Mechanical Design Department, Faculty of Engineering, Port Said University
Abstract
Assessing the structural integrity of a cracked weldment is crucial. Cracks detected during welding inspections must be examined in the context of the structure's mechanical resistance. Generally, fracture mechanics supplies essential tools to determine a fracture criterion for loading conditions. This study explores the effect of residual stress (RS) and crack orientation on determining the stress intensity factor (𝐾 ) for a welded joint using the extended finite element method. This study comprises a 3D thermo-mechanical finite element (FE) analysis to study the temperature history and the residual stress distribution of a welded joint, and a 3D FE crack model that considers two cases of cracks—longitudinal (case I) and transverse (case II)—to calculate the 𝐾 value at the middle surface of a thin butt joint. 𝐾 is calculated for cracks under applied external and residual stresses. The results demonstrate that the welding residual stress can beneficially or detrimentally affect 𝐾 depending on stress distribution and sign, and indicate the significance of RS and crack orientation on 𝐾 . Simulation results demonstrate that the longitudinal crack in case I has higher 𝐾 values than those in case II for the transverse crack and show good agreement with the analytical results.
Keywords
Welding residual stress; Stress intensity factor; Fracture mechanics; Crack orientation; Stainless steel
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