A probabilistic study of welding residual stresses distribution and their contribution to the fatigue life
Review article, 2020

Welding is a joining process that is associated with heating cycles which leads to considerable change in local material microstructure and the formation of high welding Residual stresses (RS) in the welded joint. Residual stresses can have a detrimental effect on the fatigue strength of welded joints. In this paper, previously published data from measurements of residual stresses in various types of welded joints are compiled. In total, more than 100 test results are studied covering steels with yield strengths between 307 MPa and 1050 MPa in different welded details (butt joints, longitudinal and transverse attachments, cruciform joints, as well as K-joints) with varying thicknesses. The collected data is used to study the distribution of welding residual stresses (regardless of the welding parameters) at weld toe and through the thickness of the welded plate. Probabilistic analysis is then used to arrive at a model that represents the value and distribution of residual stresses in welded joints. This model is used to predict and explain the scatter in fatigue test data from recent fatigue testing of welded samples.

Welding

Probability density function

Compressive residual stresses

Residual stresses shapes

Tensile residual stresses

Author

Asma Manai

Chalmers, Architecture and Civil Engineering, Structural Engineering

Rüdiger Ulrich Franz von Bock und Polach

Technical University of Hamburg (TUHH)

Mohammad al-Emrani

Chalmers, Architecture and Civil Engineering, Structural Engineering

Engineering Failure Analysis

1350-6307 (ISSN)

Vol. 118 104787

LifeExt - Livslängdsförlängning för befintliga stålbroar

Swedish Transport Administration, 2018-05-15 -- 2020-11-30.

VINNOVA, 2017-06-08 -- 2019-12-31.

Subject Categories

Applied Mechanics

Manufacturing, Surface and Joining Technology

Other Materials Engineering

DOI

10.1016/j.engfailanal.2020.104787

More information

Latest update

9/23/2020