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Predicting the response and perforation of fibre metal laminates subjected to projectile impact

Y.J. Liu (CAS Key Laboratory for Mechanical Behavior and Design of Materials, University of Science and Technology of China , Hefei, China)
Z.H. Wang (CAS Key Laboratory for Mechanical Behavior and Design of Materials, University of Science and Technology of China , Hefei, China)
H.M. Wen (CAS Key Laboratory for Mechanical Behavior and Design of Materials, University of Science and Technology of China , Hefei, China)

Aircraft Engineering and Aerospace Technology

ISSN: 0002-2667

Article publication date: 6 September 2021

Issue publication date: 7 January 2022

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Abstract

Purpose

The purpose of this paper is to predict the response and perforation of fibre metal laminates (FMLs) subjected to impact by projectiles at different velocities.

Design/methodology/approach

A finite element (FE) model is constructed in which recently proposed dynamic constitutive models for fibre reinforced plastic (FRP) laminates and metals are used. Moreover, a recently developed dynamic cohesive element constitutive model is also used to simulate the debonding between FRP laminates and metal sheets. The FE model is first validated against the test data for glass laminate aluminum reinforced epoxy (GLARE) both under dropped object loading and ballistic impact, then used to perform a parametric study on the influence of projectile nose shape on the perforation of FMLs.

Findings

It is found that the present model predicts well the response and perforation of GLARE subjected to impact loading in terms of load-time history, load-displacement curve, residual velocity and failure pattern. It is also found that projectile nose shape has a considerable effect on the perforation of GLARE FMLs and that the ballistic limit is the highest for a flat-ended projectile whilst for a conical-nosed missile the resistance to perforation is the least.

Originality/value

Recently developed constitutive models for FRPs and metals, together with cohesive element model which considers strain rate effect, are used in the FE model to predict the behaviour of FMLs struck by projectiles in a wider range of impact velocities; the present model is advantageous over such existing models as Johnson-Cook (JC) + Chang-Chang and JC (+BW) + MAT162 in terms of failure pattern though they produce similar results for residual velocity.

Keywords

Citation

Liu, Y.J., Wang, Z.H. and Wen, H.M. (2022), "Predicting the response and perforation of fibre metal laminates subjected to projectile impact", Aircraft Engineering and Aerospace Technology, Vol. 94 No. 2, pp. 163-175. https://doi.org/10.1108/AEAT-02-2021-0030

Publisher

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Emerald Publishing Limited

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