Numerical analysis of delamination growth in composite materials using Two Step Extension and Cohesive Zone methods

Mollón, Victoria, Bonhomme, Jorge, Elmarakbi, Ahmed, Argüelles, Antonio and Viña, Jamie (2012) Numerical analysis of delamination growth in composite materials using Two Step Extension and Cohesive Zone methods. In: ECCM 2012 - 15th European Conference on Composite Materials: Composites at Venice, 24th - 28th June 2012, Venice, Italy.

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Abstract

The simulation of delamination using the Finite Element Method (FEM) is a useful tool to analyze fracture mechanics. In this paper, simulations are performed by means of two different fracture mechanics models: Two Step Extension (TSEM) and Cohesive Zone (CZM) methods, using implicit and explicit solvers, respectively. TSEM is an efficient method to determine the energy release rate components GIc, GIIc and GIIIc using the experimental critical load (Pc) as input, while CZM is the most widely used method to predict crack propagation (Pc) using the critical energy release rate as input. Both methods were compared in terms of convergence performance and accuracy to represent the material behaviour and in order to investigate their validity to predict mode-I interlaminar fracture failure in unidirectional AS4/8552 carbon fibre composite laminates. Numerical simulations are compared with experimental results performed by means of Double Cantilever Beam (DCB) in order to discuss the results and to have a full visualization of this damage. Results showed a good agreement among both FEM models and experimental results.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Delamination, CZM, FEM, Cohesive Elements
Subjects: H300 Mechanical Engineering
J500 Materials Technology not otherwise specified
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Paul Burns
Date Deposited: 19 Dec 2018 17:11
Last Modified: 22 Mar 2019 10:15
URI: http://nrl.northumbria.ac.uk/id/eprint/37376

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