STP1389

    Computer Aided Nondestructive Evaluation Method of Welding Residual Stresses by Removing Reinforcement of Weld (Proposal of a New Concept and Its Verification)

    Published: Jan 2000


      Format Pages Price  
    PDF Version (324K) 15 $25   ADD TO CART
    Complete Source PDF (12M) 15 $325   ADD TO CART


    Abstract

    A new method (the bead flush method) is proposed to estimate welding residual stresses non-destructively. First, the reinforcement of the weld is removed. Then from released strains on the surface due to removal, eigenstrain distributions are estimated by an inverse analysis. Finally, residual stresses are determined by the finite element method (FEM) using estimated eigenstrains as boundary conditions.

    Numerical simulations were conducted to develop a sophisticated procedure. It is shown by numerical simulations that the proposed method gives reasonably good predictions of residual stress. Also, the validity of the proposed method was evaluated experimentally for a butt-welded plate joint. Based on this work, future problems to overcome are discussed.

    Keywords:

    welding residual stresses, eigenstrain, reinforcement of weld, non-destructive evaluation, inverse problem


    Author Information:

    Kumagai, K
    Graduate student, Tokyo Institute of Technology, Tokyo,

    Nakamura, H
    Professor, Tokyo Institute of Technology, Tokyo,

    Kobayashi, H
    Professor, Tokyo Institute of Technology, Tokyo,


    Paper ID: STP14798S

    Committee/Subcommittee: E08.04

    DOI: 10.1520/STP14798S


    CrossRef ASTM International is a member of CrossRef.