Method of Constraint Loss Correction for CTOD Fracture Toughness under Welding Residual Stress Field
This paper studied the assessment method for welding residual stress effects and constraint loss effects on brittle fracture of structural component subjected to membrane stress. The methodology of CTOD fracture toughness correction for welded joints is proposed from lower to upper ductile-brittle transition temperature region. The methodology is based on the tensile plastic zone size criterion and the equivalent CTOD ratio derived from the Weibull stress criterion. It has been found that the proposed methodology has given the reasonable fracture assessment results.
T. Chandra, N. Wanderka, W. Reimers , M. Ionescu
Y. Yamashita and F. Minami, "Method of Constraint Loss Correction for CTOD Fracture Toughness under Welding Residual Stress Field ", Materials Science Forum, Vols. 638-642, pp. 3931-3936, 2010