Analysis of Thermal Elastic-Plastic Behavior of Metals during Welding by Finite Element Method

The Characteristics of the Source of Welding Residual Stress (Inherent Strain) and its Application to Measurement and Prediction

“…& - The inherent strain distributions in Specimens T and L are the same as that in Specimen R, since the cutting is made to satisfy assumption (1). & x being perpendicular to the cross section does not produce stress (assumption (2» in Specimen T. Therefore, the source of residual stress remaining in Specimen T is the cross-sectional inherent strain {& CO}.…”

“…From the theoretical viewpoint, thermal elasto-plastic analysis [1] is the most general method to predict welding residual stress taking account of many influential factors. By this method, complex calculation can be performed simulating the entire mechanical behavior during welding and the welding residual stress is obtained at the end of the calculation.…”

Fast Prediction of Welding Distortion of Large Structures using Inherent Deformation Database and Comparison with Measurement

“…With the progress of computing technology, people prefer to perform numerical simulations on welding distortion and residual stress before experiments. Ueda et al 1) classified the computational approaches to welding distortion and residual stress into two ways which are thermal elastoplastic FEM 2) and the inherent strain method.…”

“…Since the thermal elastoplastic FEM for the transient welding stress and strain was early proposed Ueda and Yamakawa 2) , it has been widely employed in the research. Although researches have proposed some advanced computing schemes such as the iterative substructure method 3,4) or parallel computing technology 5)- 8) , the computing time of the thermal elastoplastic FEM is still very long when it is employed to compute the welding distortion and residual stress in large structures.…”

Finite Element Analysis on the Formation of Residual Stresses during Welding of Oil and Gas Pipe

“…Ueda and Yamakawa [21] employed 2D finite element analysis to analyze the effect of geometry configuration on residual stress and compared the results with experimental values. Owen et al [22] compared results from neutron diffraction, X-ray diffraction, synchrotron X-ray diffraction and FEM of residual stress developed during welding of aluminum alloy AA2024. Deng et al [23] developed a 3D FE model for simulating residual stresses during multi pass welding of a pipe.…”