Microstructural strain localisation phenomena in fibre-reinforced polymer composites: Insights from nanoscale digital image correlation and finite element modelling
(2024) Composites Science and Technology — Vol. 258, p. 110842 (2024)
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- Authors
Van Vlierberghe, E. 
Breite, C. Swolfs, Y.
- Abstract
- Multiscale models for fibre-reinforced polymer composites currently lack experimentally validated microscale damage descriptors as input parameters. This work demonstrates the occurrence of strain localisation phe- nomena at the fibre/matrix level using nanoscale digital image correlation. Unidirectional carbon-fibre rein- forced epoxy and glass-fibre reinforced PMMA composites were loaded in transverse compression in a scanning electron microscope. Radial and shear strain maps were extracted and compared with finite element simulations based on a conventional elastoplastic model. Near the interface, an interphase layer is present in the matrix, presumably due to locally different polymerisation conditions. A skin-core structure was found in carbon fibres, corresponding to an increased transverse modulus towards the interface.
- Affiliations
KU Leuven MTM WEL Research Institute
Citations
Van Vlierberghe, E., Gayot, S., Klavzer, N., Breite, C., Pardoen, T., & Swolfs, Y. (2024). Microstructural strain localisation phenomena in fibre-reinforced polymer composites: Insights from nanoscale digital image correlation and finite element modelling. Composites Science and Technology, 258, 110842. https://doi.org/10.1016/j.compscitech.2024.110842 (Original work published 2024)