An elasto-viscoplastic constitutive model for polymers at finite strains: Formulation and computational aspects
Journal article, 2016

This paper describes a finite strain elasto-viscoplastic constitutive model to predict the non-linear behaviour of polymeric based materials. The theoretical basis of the material model and the computational treatment are presented. The operator split methodology and the Newton-Raphson method are used to derive the state update algorithm and to obtain the numerical solution. The integration algorithm reduces to the solution of only one scalar non-linear equation. A closed formula for the corresponding consistent tangent operator is presented. Different aspects of the constitutive model and its integration algorithm are investigated by considering a comprehensive set of numerical examples.


Mohsen Mirkhalaf

University of Porto

Francisco Pires

University of Porto

Ricardo Simoes

University of Minho

Computers and Structures

0045-7949 (ISSN)

Vol. 166 60-74

Subject Categories

Applied Mechanics

Construction Management

Reliability and Maintenance



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4/9/2021 6