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- W4323922810 endingPage "108278" @default.
- W4323922810 startingPage "108278" @default.
- W4323922810 abstract "The rate- and temperature-dependent “macromolecular” polymer plasticity relies on a thermally-activated model of the non-linear strain measure, and is thus deficient in an explicit definition of the yield surface. Such an approach, typically written in the rate-form, is only suitable for the explicit finite element solver where the consistent tangent modulus and the return mapping process are unnecessary. This paper presents a procedure to deduce the pressure-dependent yield function of the rate- and thermal-based plastic constitutive models in the continuum thermodynamics. The recasted yield model aids in deriving its consistent elasto-thermoviscoplastic tangent modulus and implementing it in the implicit finite element solver. The recasted expressions are suitable for incremental formulation using the classical radial return mapping algorithm, regardless of the complexities of the original macromolecular expression. Four viscoplastic macromolecular models are used to illustrate the recasting process: three of them are based on the classical Boyce-Parks-Argon model and one on the Bergström-Boyce model. Numerical simulations are performed on real-sized specimen geometries to establish the functionality and capabilities of the methodology. The practical advantage of the implicit-oriented forms is studied in comparison to the explicit-based implementation under quasi-static and isothermal conditions." @default.
- W4323922810 created "2023-03-12" @default.
- W4323922810 creator A5009849684 @default.
- W4323922810 creator A5027633803 @default.
- W4323922810 creator A5050078209 @default.
- W4323922810 date "2023-07-01" @default.
- W4323922810 modified "2023-09-25" @default.
- W4323922810 title "Constitutive recasting of macromolecular-based thermoviscoplasticity as yield function-based formulation" @default.
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