Method of Constraint Loss Correction for CTOD Fracture Toughness under Welding Residual Stress Field

Yoichi Yamashita; Fumiyoshi Minami

doi:10.4028/www.scientific.net/MSF.638-642.3931

Paper Titles

Grain Boundary Pinning by Particles
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On the Effects Associated with Control Parameters Delay during Biaxial Cyclic Loading of Engineering Materials
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Tools and Technologies for Hot Forming with Local Adjustment of Part Properties
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Simulating Phase Coarsening of Ultra-High Volume Fractions
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Method of Constraint Loss Correction for CTOD Fracture Toughness under Welding Residual Stress Field
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Evaluation of High Temperature Fatigue Behaviour of P22 by Miniature Specimen Testing
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Characterization of Lanthanoid and Aluminum Based Oxide Film for Wide Bandgap Semiconductors
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Microstructural and Mechanical Studies in Al-Mg Based Alloys Obtained by Conventional and P/M Processes after Special Thermomechanical Treatments
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Friction Stir Welding of Magnesium Alloys under Different Process Parameters
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Method of Constraint Loss Correction for CTOD Fracture Toughness under Welding Residual Stress Field

Abstract:

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.