A multiscale and multiphysics numerical framework for modelling of hygrothermal ageing in laminated composites

A multiscale and multiphysics numerical framework for modelling of hygrothermal ageing in laminated composites

Rocha, I.B.C.M. (TU Delft Applied Mechanics; Knowledge Centre WMC)
van der Meer, F.P. (TU Delft Applied Mechanics)
Nijssen, RPL (Knowledge Centre WMC)
Sluys, Lambertus J. (TU Delft Applied Mechanics)

2017

In this work, a numerical framework for modelling of hygrothermal ageing in laminated composites is proposed. The model consists of a macroscopic diffusion analysis based on Fick's second law coupled with a multiscale FE² stress analysis in order to take microscopic degradation mechanisms into account. Macroscopic material points are modelled with a representative volume element with random fibre distribution. The resin is modelled as elasto-plastic with damage, and cohesive elements are included at the fibre/matrix interfaces. The model formulations and the calibration of the epoxy model using experimental results are presented in detail. A study into the representative volume element size is conducted, and the framework is demonstrated by simulating the ageing process of a unidirectional specimen immersed in water. The influence of transient swelling stresses on microscopic failure is investigated, and failure envelopes of dry and saturated micromodels are compared.

Composites
Damage
Micromechanics
Multiscale

http://resolver.tudelft.nl/uuid:5fced1d5-d308-4991-9788-465830db1d1e

https://doi.org/10.1002/nme.5542

2018-04-01

0029-5981

International Journal for Numerical Methods in Engineering, 112 (4), 360–379

Institutional Repository

journal article

© 2017 I.B.C.M. Rocha, F.P. van der Meer, RPL Nijssen, Lambertus J. Sluys