A crystal plasticity phenomenological model to capture the non-linear shear response of carbon fibre reinforced composites

Brian Falzon, Wei Tan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)
14 Downloads (Pure)

Abstract

A hardening response is often observed for shear-dominated large deformation of Carbon Fibre Reinforced Plastics (CFRP). This non-linear response is often modelled by fitting a strain hardening lawagainst experimental stress-strain curves. Inspired by a crystal plasticity framework, a phenomenologicalmodel is developed to capture matrix shearing and fibre rotation of CFRP under finite strain. Thisphenomenological model is first verified by simple shear and transverse compression tests, followed bycomprehensive validations against measured stress-strain responses of unidirectional (UD) and cross-plycomposite laminates subjected to quasi-static loading. The analytical and finite element predictions ofCFRP lamina under simple shear loading confirm that the initial yielding is governed by the shear yieldstrength of the matrix, while the hardening behaviour is dependent on the modulus and rotation of thecarbon fibres. This model accurately predicts the non-linear behaviour of CFRP under off-axis loadingwithout the need of an empirical curve-fitted strain hardening law.
Original languageEnglish
Pages (from-to)99-109
Number of pages11
JournalInternational Journal of Lightweight Materials and Manufacture
Volume4
Issue number1
Early online date30 Jun 2020
DOIs
Publication statusPublished - Mar 2021

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