Experimental/numerical characterization of hygrothermal ageing in glass/epoxy composites

Experimental/numerical characterization of hygrothermal ageing in glass/epoxy composites

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

Drechsler, K. (editor)

2016

In this work, a combined experimental/numerical approach is used to investigate the effect of water ingression in glass/epoxy composite specimens. Interlaminar shear (ILS) specimens were immersed at 50◦C for multiple durations and tested. Re-dried specimens were also tested. Significant strength degradation of up to 50% was found for wet specimens, while dried ones showed an irreversible decrease in strength of approximately 9%. The diffusion phenomenon was also investigated numerically in a multiscale /multiphysics framework. At the microscale, an RVE combining linear-elastic fibres, elasto-plastic resin with damage and cohesive interfaces was used. At the macroscale, a classic stress equilibrium analysis is coupled with a Fickian diffusion model, and an independent micromodel is run at each macroscopic integration point. The model was used to simulate diffusion in a short-beam specimen and regions of plastic deformation, interface failures and softening bands in the resin were identified.

Micromechanics
Matrix nonlinearity
Orthotropic model
Plasticity
Damage

http://resolver.tudelft.nl/uuid:fbd25aac-ace4-4a49-8626-6d85ad1a488a

KIT

978-3-00-053387-7

Proceedings of the 17th European Conference on Composite Materials: Munich, Germany

17th European Conference on Composite Materials, ECCM 2016, 2016-06-26 → 2016-06-30, Munich, Germany

Institutional Repository

conference paper

© 2016 I.B.C.M. Rocha, S Raijmaekers, RPL Nijssen, F.P. van der Meer, Lambertus J. Sluys