Analysis of near weld stress field based on strain measurement and physical mesomechanics
- Authors: Yoshida S.1, Sasaki T.2, Usui M.2, Park I.3
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Affiliations:
- Southeastern Louisiana University
- Niigata University
- Seoul National University of Science and Technology
- Issue: Vol 19, No 1 (2016)
- Pages: 41-54
- Section: Article
- URL: https://journals.rcsi.science/1029-9599/article/view/190847
- DOI: https://doi.org/10.1134/S1029959916010057
- ID: 190847
Cite item
Abstract
Stresses induced by welding are analyzed from the viewpoint of material deformation behavior. Strain gages are used to measure the residual stresses, and electronic speckle-pattern interferometry is used to analyze the response of the welded work to external force. A tensile load is applied to a butt-welded, thin-plate steel specimen, and the resultant strain field is analyzed with the electronic speckle-pattern interferometry. Comparison is made with the case of a nonwelded specimen of the same material and dimension. The analysis indicates that the residual stress due to welding makes the normal strain due to the external tensile load asymmetric. The asymmetry enhances shear and rotational modes of deformation, generating stress concentration at a point away from the weld where the residual stress is substantially negligible. The observed features are discussed based on physical mesomechanics. Analysis reveals plastic deformation like behavior in the response of the welded specimen to the external force.
About the authors
S. Yoshida
Southeastern Louisiana University
Author for correspondence.
Email: syoshida@selu.edu
United States, Hammond, 70402
T. Sasaki
Niigata University
Email: syoshida@selu.edu
Japan, Niigata, 950-2181
M. Usui
Niigata University
Email: syoshida@selu.edu
Japan, Niigata, 950-2181
Ik-K. Park
Seoul National University of Science and Technology
Email: syoshida@selu.edu
Korea, Republic of, Seoul, 139-743