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Title: Numerical analysis of size effects on open-hole tensile composite laminates
Authors: Chen, B.Y.
Tay, T.E. 
Baiz, P.M.
Pinho, S.T.
Keywords: A. Laminates
B. Fracture toughness
B. Strength
C. Computational modelling
Issue Date: 2013
Citation: Chen, B.Y., Tay, T.E., Baiz, P.M., Pinho, S.T. (2013). Numerical analysis of size effects on open-hole tensile composite laminates. Composites Part A: Applied Science and Manufacturing 47 (1) : 52-62. ScholarBank@NUS Repository.
Abstract: The tensile strength of open-hole fibre reinforced composite laminates depends on in-plane, thickness and ply lay-up scaling. Translaminar (fibre direction) mode I fracture toughness has recently been experimentally determined to be thickness dependent. This paper presents a computational study of the tensile strength prediction of open-hole laminates using a cohesive zone model. To the authors' knowledge, it is for the first time in the literature that the thickness-dependence of translaminar fracture toughness is accounted for in the numerical modelling of composites. The thickness size effect in the strength of open-hole composite laminates failed by pull-out is accurately predicted for the first time by a deterministic model. It is found that neglecting delamination in the numerical models will lead to mesh-dependency and over-estimation on the predicted strength. Smeared crack model with cohesive elements to model delamination is able to predict the correct failure mode; but it is found not suitable for accurate strength predictions for laminates failed by delamination. © 2012 Elsevier Ltd. All rights reserved.
Source Title: Composites Part A: Applied Science and Manufacturing
ISSN: 1359835X
DOI: 10.1016/j.compositesa.2012.12.001
Appears in Collections:Staff Publications

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