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An incremental 2D constitutive model accounting for linear viscoelasticity and damage development in short fibre composites
Author(s) -
Varna J.,
Oldenbo M.
Publication year - 2005
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.1411
Subject(s) - viscoelasticity , subroutine , materials science , composite material , solver , ultimate tensile strength , constitutive equation , compression (physics) , bending , tensile testing , test data , structural engineering , tension (geology) , finite element method , mathematics , computer science , engineering , mathematical optimization , programming language , operating system
A model accounting for linear viscoelasticity and microdamage evolution in short fibre composites is described. An incremental 2D formulation suitable for FE‐simulation is derived and implemented in FE‐solver ABAQUS. The implemented subroutine allows for simulation close to the final failure of the material. The formulation and subroutine is validated with analytical results and experimental data in a tensile test with constant strain rate using sheet moulding compound composites. FE‐simulation of a four‐point bending test is performed using shell elements. The result is compared with linear elastic solution and test data using a plot of maximum surface strain in compression and tension versus applied force. The model accounts for damage evolution due to tensile loading and neglects any damage evolution in compression, where the material has higher strength. Simulation and test results are in very good agreement regarding the slope of the load–strain curve and the slope change. Copyright © 2005 John Wiley & Sons, Ltd.