Study Of Residual Stresses In Linearly Varying Biaxial-stress Fields

Author:  Cordiano, H.V. and Salerno, V.L.
Source:  SESA, Vol. XXVI, No. 1
Doc ID:  1969015
Year of Publication:  1969
Abstract:  
Descriptors: HIGH STRENGTH STEELS-- WELDING; FILLETS-- MECHANICAL PROPERTIES; WELDED JOINTS-- MECHANICAL PROPERTIES; RESIDUAL STRESS; GRINDING; SHOT PEENING; STRESS RELAXATION A theory has been devloped for the calculation of relaxationstrains effected by drilling a hole in a plate with a linearly varying stress field. With this theory, a technique ws developed for the measurement of residual stress at the tow of tee-fillet welds in 1-1/2in HY-80 steel with the fillet in the as-welded, ground, shot peened, ground and shot peened, and mechanically peened condition. It was found that exexperimental data conform to rhe sssumed theory, and that residual stresses in aswelded tee-fillet welds in both the transverse and longitudinal directions approach the yield strength of the steel. It was also found that residual stresses are reduced approximately 25 percent by grinding, 50 percent by shot peening and 50 percent by grinding and shot peening. Mechanical peening drastically affected residual stresses by converting high tension at the toe of the fillet weld to high compression of approximately the same magnitude.