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Coupled Systems Mechanics
  Volume 8, Number 3, June 2019 , pages 273-287

Residual stress in an elastoplastic annular disc interacting with an elastic inclusion
Somayeh Bagherinejad Zarandi, Hsiang-Wei Lai, Yun-Che Wang and Sergey M. Aizikovich

    Elastoplastic analysis of an annular disc, being fully constrained on its outer rim and interacting with a purely elastic inclusion perfectly bonded with its inner rim, is conducted to study its plastic deformation and residual stress under thermal cycles. The system is termed the composite disc. Quasi-static plane-strain deformation is assumed, and the von Mises yield criterion with or without the Ludwik hardening rule is adopted in our finite element calculations. Effects of multiple material properties simultaneously being temperature dependent on the plastic behavior of the composite disc are considered. Residual stress is analyzed from a complete loading and unloading cycle. Results are discussed for various inclusion radii. It is found that when temperature dependent material properties are considered, the maximum residual stress may be greater than the maximum stress inside the disc at the temperature-loaded state due to lower temperature having larger yield stress. Temperature independent material properties overestimate stresses inside materials, as well as the elastic irreversible temperature and plastic collapse temperature.
Key Words
    plasticity; residual stress; temperature-dependent material properties; finite element analysis; composite circular disc
Somayeh Bagherinejad Zarandi, Hsiang-Wei Lai and Yun-Che Wang: Department of Civil Engineering, National Cheng Kung University, 1 University Road, Tainan 70101, Taiwan

Sergey M. Aizikovich: Research and Education Center \"Materials\", Don State Technical University and Vorovich Research Institute of Mechanics and Applied Mathematics, Southern Federation University, Rostov-on-Don, Russia

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