Cyclic viscoplastic behavior of thick spherical vessels under strain controlled loads based on the Chaboche unified model

Experimental and theoretical research on creep‐fatigue behaviors of 316L steel with and without 650°C thermal aging

“…Various models have been proposed for simulating cyclic and time‐independent behavior of materials such as Prager, Armstrong and Frederick and Chaboche plasticity models 23 . Prager proposed a simple linear kinematic hardening model, which can be expressed as the following formula: …”

Viscoplastic constitutive model considering strain rate sensitivity under multiaxial thermomechanical fatigue loading

“…About the application in the field of mechanical science, the unified viscoplastic constitutive models are widely adopted in the expression of cyclic mechanical response of materials and structural design of components at high temperature 47–66 . For example, Wang et al 47 combined Kachanov damage evolution equation and an anisotropic tensor into the Chaboche model to describe the anisotropic mechanical response; then, the creep process was simulated by the finite element software with the subroutine of the modified model for a hollow turbine blade.…”

“…Bartošák 60 presented a viscoplastic model considering the influences of nonproportional additional hardening, strain range‐dependent cyclic softening, static recovery, and strain rate sensitivity, which was used to express the stress–strain behavior of the material under fatigue–creep loading. Falahi et al 61 analyzed the inelastic deformation using the Chaboche model for the thick spherical vessels under thermomechanical loading. Li et al 62 examined the effectiveness of developed viscoplastic model in expressing primary creep regeneration under strain‐controlled cyclic loading and loading‐controlled creep with multiple stress transients.…”

“…About the application in the field of mechanical science, the unified viscoplastic constitutive models are widely adopted in the expression of cyclic mechanical response of materials and structural design of components at high temperature. [47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65][66] For example, Wang et al 47 combined Kachanov damage evolution equation and an anisotropic tensor into the Chaboche model to describe the anisotropic mechanical response; then, the creep process was simulated by the finite element software with the subroutine of the modified model for a hollow turbine blade. Zhang and Xuan 48 introduced a cyclic softening term to modify the kinematic hardening rule and proposed a linear term and a static recovery term to modify the isotropic hardening rule, which can describe the decelerated stress relaxation and the accelerated cyclic softening for the material at high temperature.…”