Assessment of Residual Stresses in a T-joint Weld by Combined Experimental/Theoretical Approach

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Abstract

Residual stresses are common in metal structures, essentially influencing their mechanical behaviour. We consider a combined experimental/theoretical approach to residual stresses. The theoretical basis of analysis is provided by the recently developed F0-approach, operating with explicit relation between load-free and stress-free configurations. The titanium alloy Ti-6Al-4V is modelled with the multiplicative decomposition of the deformation gradient into the elastic and the plastic parts. Isotropic hyperelastic relations between stresses and elastic strains are assumed. The weak invariance of the material model allows for incorporation of residual stresses without additional numerical costs. In order to demonstrate the new experimental/theoretical approach to residual stresses, experimentally measured stresses are extrapolated from the surface inside the welded T-joint. The robustness of the stress extrapolation procedure is confirmed on synthetic experimental data.

Original languageEnglish
Article number012059
JournalJournal of Physics: Conference Series
Volume1945
Issue number1
DOIs
Publication statusPublished - 29 Jun 2021
Event22nd Winter School on Continuous Media Mechanics, WSCMM 2021 - Perm, Virtual, Russian Federation
Duration: 22 Mar 202126 Mar 2021

OECD FOS+WOS

  • 1.03 PHYSICAL SCIENCES AND ASTRONOMY

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