A Predicting Method of Welding Residual Stress Using Source of Residual Stress (Report IV) : Experimental Verification for Predicting Method of Welding Residual Stresses in T-joints Using Inherent Strains(Mechanics, Strength & Structural Design)

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In this paper, a predicting method of welding residual stress in a T-joint using inherent strain (the source of residual stress) is verified by experiments. The measured inherent strains are compared with the results of thermal elasto plastic analysis and the simplified formulae proposed by some of the authors. The released strains along the welding direction of T-joints are measured by strain gauges, and inherent strains are calculated from the released strains. The stress equilibrium across the cutting plane during releasing strains by cutting should be maintained in order to accurately determine the inherent strains. The measuredinherent strains in T-joints agree well with the results of thermal elasto-plastic analysis and also with those by estimating formulae which are represented within the scatter of the inherent strain distribution. The proposed predicting method of welding residual stresses using the inherent strains is experimentally validated.
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