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Penetration of CFRP laminates by cylindrical indenters

University of British Columbia

The main focus of this thesis has been towards understanding the local penetration behaviour of a CFRP laminate undergoing quasi-static out-of-plane loading. This information is necessary for predicting dynamic impact behaviour. An experimental program was performed that characterized the damage mechanisms occurring during penetration and confirmed the validity of model assumptions. The principal test consisted of a 7.62 mm diameter blunt-nosed cylindrical indenter penetrating various thicknesses of CFRP coupons supported over a rectangular opening. Even though some additional experimental data is yet required for a complete study, the necessary characterization tests have been identified, and, in some cases, developed. A simple analytical model to describe the quasi-static penetration process was developed giving an approximate prediction of the force-displacement behaviour. This model was based upon actual physical phenomena and used an approximate energy method to predict the displacement profile of the delaminated plate. Good correlation was found between the predicted delamination sizes and those measured using C-scans.

Thesis/Dissertation

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2009-02-03

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http://hdl.handle.net/2429/4135

Materials Engineering

University of British Columbia

UBCV

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