finite strain – Mechanics of Polymers

VUMAT for finite strain viscoelasticity

July 30, 2026 by admin

Together with my student Damien Ollion, we have converted the finite-strain viscoelastic UMAT originally developed with Florian Gouhier into a VUMAT for Abaqus/Explicit. The implementation reproduces the constitutive model of Reese and Govindjee (1998) for a generalized Maxwell model and includes the following features: A comprehensive How-to-use.pdf document is provided. It presents the constitutive equations, illustrates the...

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Abaqus finite strain Polymer Shape memory polymer soft polymers viscoelasticity

A finite strain viscoelastic model with damage and tension/compression asymmetry

November 25, 2024 by admin

In an effort to bring some clarification on the vast literature on finite strain viscoelastic models, initially defined for elastomers, a review of the pioneering models on finite strain viscoelastic from Le Tallec et al. (1993), Lion (1997) and Reese and Govindjee (1998) has shown that these models are totally equivalent [1]. It is not...

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finite strain GitHub Model Propellants rubbers UMAT viscoelasticity