Modelling of size-dependent plasticity in polymer-based composites based on nano- and macroscale experimental results
(2024) Composites Part A: Applied Science and Manufacturing — Vol. 185, n° 1, p. 108309 (2024)
Files
manuscript_final.pdf
preprint
Open Access - Adobe PDF
- 1.33 MB
Details
- Authors
- Abstract
- (en) A number of experimental evidences indicate that the local response of polymer matrices near fibres is inadequately represented by classical continuum models relying on the bulk polymer behaviour. This results from size-dependency associated to large plastic strain gradients, complex interphase behaviour and/or changes of polymer structure. Classical multiscale models require artificial tuning of the properties to provide realistic macroscale predictions. We demonstrate that an unprecedented modelling approach based on a micromorphic theory is able to capture such size effects in long-fibre composites. The model is identified via nano digital image correlation strain fields and validated by predicting the strengthening found in transverse compression of UD composites, not captured by classical models. Micro-shear bands are properly regularised by the model, thus correctly handling the size-dependent plasticity and softening effects. The improved prediction of the strain localisation pattern in the matrix opens avenues to more accurately model interfacial failure and damage processes.
- Affiliations
Citations
Klavzer, N., Abatour, M., Chevalier, J., Forest, S., & Pardoen, T. (2024). Modelling of size-dependent plasticity in polymer-based composites based on nano- and macroscale experimental results. Composites Part A: Applied Science and Manufacturing, 185(1), 108309. https://doi.org/10.1016/j.compositesa.2024.108309 (Original work published 2024)