A framework for macroscale modelling of inelastic deformations in 3D-woven composites
Journal article, 2021

The use of 3D-woven composite materials has shown promising results. Along with weight-efficient stiffness and strength, they have demonstrated encouraging out of plane properties, damage tolerance and energy absorption capabilities. The widespread adoption of 3D-woven composites in industry however, requires the development of efficient computational models that can capture the material behaviour. The following work proposes a framework for modelling the mechanical response of 3D-woven composites on the macroscale. This flexible and thermodynamically consistent framework, decomposes the stress and strain tensors into two main parts motivated by the material architecture. The first is governed by the material behaviour along the reinforcement directions while the second is driven by shear behaviours. This division allows for the straightforward addition and modification of various inelastic phenomena observed in 3D-woven composites. In order to demonstrate the applicability of the framework, focus is given to predicting the material response of a 3D glass fibre reinforced epoxy composite. Prominent non-linearities are noted under shear loading and loading along the horizontal weft yarns. The behaviour under tensile loading along the weft yarns is captured using a Norton style viscoelasticity model. The non-linear shear response is introduced using a crystal plasticity inspired approach. Specifically, viscoelasticity is driven on localised slip planes defined by the material architecture. The viscous parameters are calibrated against experimental results and off axis tensile tests are used to validate the model.

Viscoelasticity

3D-fibre reinforcement

Anisotropy

Author

Carolyn Oddy

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Magnus Ekh

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Tomas Ekermann

Royal Institute of Technology (KTH)

Stefan Hallström

Royal Institute of Technology (KTH)

Martin Fagerström

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Mechanics of Materials

0167-6636 (ISSN)

Vol. 160 103856

Ductile fiber reinforced composites

Swedish Energy Agency (2016-008713), 2016-12-06 -- 2019-12-31.

Subject Categories

Applied Mechanics

Other Materials Engineering

Composite Science and Engineering

DOI

10.1016/j.mechmat.2021.103856

More information

Latest update

6/29/2021