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Modeling of anisotropic tensile and cyclic viscoplastic behavior of a nickel-base directionally solidified superalloy
Highlights Conduct the tensile and fatigue tests of DS superalloy at different temperatures. Propose a modified Chaboche model to describe mechanical behavior of DS superalloy. Use an explicit integration method to achieve FEM calculation of the constitutive model. Develop a new grouping optimization method to identify the material parameters. Verify the modeling capacity of the modified Chaboche model.
Abstract Effects of temperature and crystallographic orientation on tensile and cyclic viscoplastic behavior of a nickel-base directionally solidified superalloy, DZ125, have been experimentally investigated and modeled using a unified anisotropic viscoplastic constitutive model. This constitutive model is compiled as an ABAQUS/UMAT by the self-adaptive explicit integration scheme. A grouping optimization method is proposed to identify the material parameters. The results show that the unified viscoplastic constitutive model is able to characterize the rate-dependent anisotropic tensile and cyclic viscoplastic behavior of DZ125 superalloy and the simulation results are in good agreement with the experimental data.
Modeling of anisotropic tensile and cyclic viscoplastic behavior of a nickel-base directionally solidified superalloy
Highlights Conduct the tensile and fatigue tests of DS superalloy at different temperatures. Propose a modified Chaboche model to describe mechanical behavior of DS superalloy. Use an explicit integration method to achieve FEM calculation of the constitutive model. Develop a new grouping optimization method to identify the material parameters. Verify the modeling capacity of the modified Chaboche model.
Abstract Effects of temperature and crystallographic orientation on tensile and cyclic viscoplastic behavior of a nickel-base directionally solidified superalloy, DZ125, have been experimentally investigated and modeled using a unified anisotropic viscoplastic constitutive model. This constitutive model is compiled as an ABAQUS/UMAT by the self-adaptive explicit integration scheme. A grouping optimization method is proposed to identify the material parameters. The results show that the unified viscoplastic constitutive model is able to characterize the rate-dependent anisotropic tensile and cyclic viscoplastic behavior of DZ125 superalloy and the simulation results are in good agreement with the experimental data.
Modeling of anisotropic tensile and cyclic viscoplastic behavior of a nickel-base directionally solidified superalloy
Dong, Chengli (author) / Yang, Xiaoguang (author) / Shi, Duoqi (author) / Yu, Huichen (author)
2013-10-29
13 pages
Article (Journal)
Electronic Resource
English
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