Abstract
In order to investigate features of residual stress distribution generated by patch welding and influences of joint dimeisnions and restraint conditions on the residual stress, a series of experiment and analysis was carried out. The controlled thermal severity weld cracking test specified by JIS could be simulated by the thermal elastic plastic analysis. It was shown that the base plate length did not affect the residual stress at the weld toe. However, the width and thickness of base plate largely affected the residual stress at the weld toe. When the shrinkage of base plate was resitained, the residual stress at the weld toe became higher than that without resitraint. A measure of the degree of restraint for patch welding was proposed based on a simple elastic analysis. It was confirmed that the residual stress might be estimated by the proposed measure.
