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JWJ > Volume 28(1); 2010 > Article
Journal of KWJS 2010 February;28(1) :100-106.
Published online March 10, 2010.
Crack Growth Analysis of Dissimilar Metal Weld using a Numerical Method
Sang-Chul Kim, Maan-Won Kim

Correspondence:   Published online March 10, 2010
ABSTRACT
  In this paper crack propagation analyses in the dissimilar metal weldment of a nozzle were performed using a finite element alternating method (FEAM). A two-dimensional axisymmetric finite element nozzle model was prepared and welding simulation including the thermal heat transfer analysis and the thermal stress analysis was performed. Initial cracks were inserted at weld and heat affected zone in the finite element model which has welding residual stress distribution obtained from the welding simulation. To calculate crack propagation trajectories of these cracks, a new fatigue crack evaluation module was developed in addition to the previous FEAM program. With the new FEAM fatigue crack evaluation module, crack propagation trajectory and crack growth time were calculated automatically and effectively.
Keywords: Dissimilar metal welding;Crack propagation;Finite element alternating method;Weld residual stress
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