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Non-associated viscoplasticity coupled with an integral-type nonlocal damage model for mineral filled semi-crystalline polymers

Abstract : A non-associated viscoplastic model coupled with nonlocal damage under finite strain framework is developed to simulate the non-isochoric deformation and the damage process exhibiting strain-softening of a 20% mineral filled semi-crystalline polymer. The logarithmic spin tensor properties linking the Eulerian Hencky strain with the Cauchy stress is used thanks to hypoelasticity assuming the additive decomposition of the stretching into elastic and viscoplastic parts. The constitutive model with its nonlocal formulation is implemented in an efficient manner in a commercial implicit finite element code. The proposed model exhibits mesh-independent responses and is in agreement with strain evolution observed experimentally.
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https://hal-uphf.archives-ouvertes.fr/hal-03624495
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Submitted on : Wednesday, March 30, 2022 - 12:23:16 PM
Last modification on : Wednesday, August 31, 2022 - 5:06:29 PM

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Romain Balieu, Franck Lauro, Bruno Bennani, Tsukatada Matsumoto, Ernesto Mottola. Non-associated viscoplasticity coupled with an integral-type nonlocal damage model for mineral filled semi-crystalline polymers. Computers & Structures, Elsevier, 2014, 134, pp.18-31. ⟨10.1016/j.compstruc.2013.12.006⟩. ⟨hal-03624495⟩

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