Mesoscale modelling of tensile response and damage evolution in natural fibre reinforced laminates

Article dans une revue avec comité de lecture
Auteur
MAHBOOB, Zia
222472 Department of mechanical and industrial engineering (Toronto, CANADA)
CHEMISKY, Yves
BOUGHERARA, Habiba
222472 Department of mechanical and industrial engineering (Toronto, CANADA)
ccMERAGHNI, Fodil
178323 Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]

URI
http://hdl.handle.net/10985/17636
DOI
10.1016/j.compositesb.2017.03.018
Date
2017
Journal
Composites Part B: Engineering

Résumé

A continuum damage mechanics based mesoscale model is developed within a thermodynamics framework to describe the in-plane tensile response in natural fibre composites. The standard Mesoscale Damage Theory (MDT) is modified to incorporate damage and inelasticity evolution in the fibre-direction, thereby capturing the unique nonlinear fibre-direction response evidenced in natural fibre composites (NFC). The multi-ply damage model is validated using tests on Flax/epoxy laminates and available data on Carbon/epoxy laminates. Model parameters are identified for Flax/epoxy by applying an optimisation algorithm that compares numerical predictions with experimental data. Predictions of mechanical response, stiffness degradation, and inelasticity correlate very well with experimental observations of Flax-laminates. This modified-MDT model offers a predictive, robust tool to aid the development of NFC engineering structures.

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