CUED Publications database

Modelling failure of composite specimens with defects under compression loading

Lemanski, SL and Wang, J and Sutcliffe, MPF and Potter, KD and Wisnom, MR (2013) Modelling failure of composite specimens with defects under compression loading. Composites Part A: Applied Science and Manufacturing, 48. pp. 26-36. ISSN 1359-835X

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Abstract

Composite structures exhibit many different failure mechanisms, but attempts to model composite failure frequently make a priori assumptions about the mechanism by which failure will occur. Wang et al. [1] conducted compressive tests on four configurations of composite specimen manufactured with out-of-plane waviness created by ply-drop defects. There were significantly different failures for each case. Detailed finite element models of these experiments were developed which include competing failure mechanisms. The model predictions correlate well with experimental results-both qualitatively (location of failure and shape of failed specimen) and quantitatively (failure load). The models are used to identify the progression of failure during the compressive tests, determine the critical failure mechanism for each configuration, and investigate the effect of cohesive parameters upon specimen strength. This modelling approach which includes multiple competing failure mechanisms can be applied to predict failure in situations where the failure mechanism is not known in advance. © 2013 Elsevier Ltd. All rights reserved.

Item Type: Article
Uncontrolled Keywords: A. Carbon fibre B. Defects C. Damage mechanics C. Finite element analysis
Subjects: UNSPECIFIED
Divisions: Div C > Biomechanics
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:28
Last Modified: 08 Dec 2014 02:19
DOI: 10.1016/j.compositesa.2012.12.007