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A physically-based constitutive model for the shear-dominated response and strain rate effect of Carbon Fibre Reinforced composites

Tan, Wei and Liu, Burigede (2020) A physically-based constitutive model for the shear-dominated response and strain rate effect of Carbon Fibre Reinforced composites. Composites Part B: Engineering, 193 . Art. No. 108032. ISSN 1359-8368. https://resolver.caltech.edu/CaltechAUTHORS:20200409-140950553

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Abstract

A significant hardening response is often observed for the shear-dominated deformation of Carbon Fibre Reinforced Plastics (CFRP). This non-linear response is typically modelled by fitting a strain hardening law against experimental stress-strain curves. Inspired by crystal plasticity framework, we develop a micro-mechanically motivated constitutive model to capture the matrix shearing and fibre rotation of CFRP under finite strain deformation and different strain rates. Strain rate dependency of the shear modulus and yield strength of the matrix was modelled through scaling functions. This physically-based constitutive model is first verified by simple shear and transverse compression tests, followed by comprehensive validations against the measured stress-strain responses of unidirectional (UD) and cross-ply composite laminates subjected to quasi-static and dynamic off-axis loading. The finite element predictions and analytical models of CFRP lamina under simple shear loading confirms that the initial yielding is governed by the shear yield strength of matrix, while the hardening behaviour is dependent on the modulus and rotation of carbon fibres. This model accurately predicts the non-linear behaviour of CFRP under off-axis loading at different strain rates, without the need of a curve-fitted strain hardening law.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1016/j.compositesb.2020.108032DOIArticle
ORCID:
AuthorORCID
Liu, Burigede0000-0002-6518-3368
Additional Information:© 2020 Elsevier Ltd. Received 27 July 2019, Revised 31 March 2020, Accepted 1 April 2020, Available online 8 April 2020.
Subject Keywords:Polymer-matrix composites (PMCs); Plastic deformation; Micro-mechanics; Computational modelling
Record Number:CaltechAUTHORS:20200409-140950553
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200409-140950553
Official Citation:Wei Tan, Burigede Liu, A physically-based constitutive model for the shear-dominated response and strain rate effect of carbon fibre reinforced composites, Composites Part B: Engineering, Volume 193, 2020, 108032, ISSN 1359-8368, https://doi.org/10.1016/j.compositesb.2020.108032. (http://www.sciencedirect.com/science/article/pii/S1359836819324618)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:102462
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:09 Apr 2020 21:12
Last Modified:19 Nov 2020 00:22

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