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Date of Publication:2022-10-09

Journal:船舶力学

Affiliation of Author(s):运载工程与力学学部

Issue:8

Page Number:920-924

ISSN No.:1007-7294

Abstract:Thermal Elasto-plastic finite element method was used to simulate the welding residual stresses in butt-welded Q235 and 304 Stainless Steel plates with different pre-tensile stresses. The simulation re-sults indicate that the welding residual stresses present asymmetric distribution, peak of longitudinal resid-ual stress tends to be in 304 stainless steel side. Pre-tensile stress can decrease the longitudinal residual stress significantly, and the more the pre-loads, the lower the longitudinal residual stresses. An infrared thermal imager was also applied to measure surface temperature changing of welding materials in welding process, the results are accordant with that drawn from elasto-plastic finite element measurement.

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