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Influence of the nonlinear matrix material behaviour on the effective properties of textile‐reinforced thermoplastics
Author(s) -
Kästner Markus,
Obst Martin,
Brummund Jörg,
Ulbricht Volker
Publication year - 2009
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200910144
Subject(s) - homogenization (climate) , viscoplasticity , materials science , composite material , representative elementary volume , nonlinear system , constitutive equation , finite element method , strain rate , material properties , deformation (meteorology) , matrix (chemical analysis) , mechanics , structural engineering , microstructure , physics , engineering , biodiversity , ecology , quantum mechanics , biology
For a consistent lightweight design the consideration of the nonlinear macroscopic material behaviour of composites, which is amongst others driven by damage and strain‐rate effects on the mesoscale, is required. Therefore, a modelling approach using numerical homogenization techniques is applied to predict the effective nonlinear material behaviour of the composite based on the finite element simulation of a representative volume element (RVE). In this RVE suitable constitutive relations account for the material behaviour of each constituents. While the reinforcing glass fibres are assumed to remain linear elastic, a viscoplastic constitutive law is applied to represent the strain‐rate dependent, inelastic deformation of the matrix material. In order to analyse the influence of the nonlinear matrix material behaviour on the global mechanical response of the composite, effective stress‐strain‐curves are computed for different load cases and compared to experimental observations. (© 2009 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)