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Numerical and experimental analysis of residual stresses in an arc welded lap joint and mapping of the residual stress field to a simplified finite element model

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Abstract

In this paper, welding residual stresses in an arc welded lap joint are evaluated by Finite element (FE) analysis of a continuum model considering Transformation induced plasticity (TRIP). The constitutive model for the plastic behavior including TRIP is implemented in user material subroutine (UMAT) of Abaqus/Standard. Numerical results are compared with experimentally measured residual stresses by X-ray diffraction technique. Moreover, the welding residual stresses in a continuum FE model are mapped to a simplified FE model using shell elements by moving least square approximation. The methodologies and results in this study show that the welding residual stresses in a local-level FE model of a welded joint can be mapped successfully to a simplified FE model.

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Authors and Affiliations

  1. Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology, Seoul, 01811, Korea

    Ho-Young Kim & Hyun-Gyu Kim

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  1. Ho-Young Kim
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  2. Hyun-Gyu Kim
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Correspondence to Hyun-Gyu Kim.

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Recommended by Associate Editor Jun-Sik Kim

Hyun-Gyu Kim is a Professor in Department of Mechanical and Automotive Engineering at Seoul National University of Science and Technology. His research interests are in the area of computational solid mechanics with a particular emphasis on computational fracture mechanics, plasticity and multi-scale analysis.

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Kim, HY., Kim, HG. Numerical and experimental analysis of residual stresses in an arc welded lap joint and mapping of the residual stress field to a simplified finite element model. J Mech Sci Technol 31, 4895–4902 (2017). https://doi.org/10.1007/s12206-017-0937-z

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  • DOI: https://doi.org/10.1007/s12206-017-0937-z

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