Combined experimental/theoretical approach to residual stresses within multiplicative elasto-plasticity

I. I. Tagiltsev, A. V. Shutov

Research output: Contribution to journalArticlepeer-review

Abstract

The study is devoted to geometrically non-linear modelling of viscoplastic structures with residual stresses. We advocate and develop a special approach to residual stresses based on the transition between reference configurations. The finite strain kinematics of the viscoplastic material is modelled by the multiplicative decomposition of the deformation gradient tensor. Numerical algorithms originally developed for unstressed materials are extended to materials with pre-stresses. Owing to the weak invariance of constitutive equations, the incorporation of pre-stresses happens without additional costs. Thus, the advocated approach is especially efficient. A novel experimental/theoretical method for assessment of residual stresses in welded structures is presented; the method combines advantages of purely experimental and theoretical approaches. To demonstrate the applicability of the proposed procedure, we simulate plate welding. As an example we show that the procedure allows extrapolation of the field of residual stresses away from the measurement points. As another example, we address the reduction of weldment-related residual stresses by mechanical treatment.

Original languageEnglish
Article number111924
JournalInternational Journal of Solids and Structures
Volume254-255
DOIs
Publication statusPublished - 1 Nov 2022

Keywords

  • Experimental/theoretical analysis
  • Multiplicative elasto-plasticity
  • Residual stresses
  • Weak invariance
  • Weldments

OECD FOS+WOS

  • 1.03 PHYSICAL SCIENCES AND ASTRONOMY
  • 2.05 MATERIALS ENGINEERING
  • 1.01 MATHEMATICS

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