NEW METHOD FOR ESTIMATING RESIDUAL-STRESSES IN PIPE MADE BY SURFACINGWELD

A new method is presented for estimating residual stresses produced in a pipe made by surfacing weld. By focusing on the concept and the fea ture of inherent strain causing the residual stress, the proposed meth od has both the convenience of the Sachs method and the accuracy of th e inherent strain method. The experiment for residual stress of a stee l with brass cladding was done by both the Sachs and proposed method. The equation of the Sachs method for composite pipe was derived. The e quation for the new method was obtained on the basis of the theory of inherent strain. It is found that the proposed method is useful for es timating residual stresses of pipe with cladding.