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<p>The gradient microstructure and high residual stresses associated with wire are additive manufacturing (WAAM) influencing the fatigue behavior. Predicting the cyclic behavior of WAAM sample will assist in modeling both manufacturing processes and design for service. This work presents a finite element analysis framework integrating the Chaboche nonlinear kinematic hardening model and the Voce isotropic hardening law, with the von Mises criterion to account for the cyclic yield behavior. The constitutive model is calibrated using tensile and cyclic loading experiments on WAAM-fabricated SS316L stainless steel specimens. The developed constitutive model is implemented in the commercial FEA solver ABAQUS™ through a user-defined material subroutine (UMAT). The proposed framework is expected to capture stress–strain hysteresis, back stress evolution, and strain hardening effect. This study can contribute to a deeper understanding of cyclic plasticity and the improved modeling of cyclic behavior in WAAM-fabricated components for critical engineering applications.</p>

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Finite element analysis of cyclic behavior of additively manufactured SS316L

  • 期刊论文

  • 发表日期：

    2026年5月30日

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  • Rajesh Kumar,
  • Vivek Kumar Singh,
  • Hariharan Krishnaswamy,
  • Ratna Kumar Annabattula

摘要

The gradient microstructure and high residual stresses associated with wire are additive manufacturing (WAAM) influencing the fatigue behavior. Predicting the cyclic behavior of WAAM sample will assist in modeling both manufacturing processes and design for service. This work presents a finite element analysis framework integrating the Chaboche nonlinear kinematic hardening model and the Voce isotropic hardening law, with the von Mises criterion to account for the cyclic yield behavior. The constitutive model is calibrated using tensile and cyclic loading experiments on WAAM-fabricated SS316L stainless steel specimens. The developed constitutive model is implemented in the commercial FEA solver ABAQUS™ through a user-defined material subroutine (UMAT). The proposed framework is expected to capture stress–strain hysteresis, back stress evolution, and strain hardening effect. This study can contribute to a deeper understanding of cyclic plasticity and the improved modeling of cyclic behavior in WAAM-fabricated components for critical engineering applications.