PSI - Issue 17

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000

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ScienceDirect

Procedia Structural Integrity 17 (2019) 992–1001

ICSI 2019 The 3rd International Conference on Structural Integrity Experimental and numerical studies on the behaviour of fibre reinforced composites subjected to soft impact loading Haibao Liu a , Jun Liu a , Cihan Kaboglu a , Hui Chai b , Xiangshao Kong c , Bamber R.K. Blackman a , Anthony J. Kinloch a,* , John P. Dear a, * a Department of Mechanical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK b The First Aircraft Institute, No.1 East Renmin Road, Yanliang D istrict, Xi’an, Shaanxi 710089, People's Republic of China c Departments of Naval Architecture, Ocean and Structural Engineering, School of Transportation, Wuhan University of Technology, Wuhan, Hubei 430063, People's Republic of China. Abstract This paper presents detailed experimental and numerical studies on the behaviour of composite laminates subject to impact loading by soft objectives. In this research, gas-gun experiments employ woven carbon fibre reinforced poly (ether-ether ketone) (CF/PEEK) and gelatine projectiles to study the response of composite laminates under soft impact loading. A high-speed camera is employed to capture the deformation of the projectiles and a three dimensional (3D) Digital Image Correlation (DIC) system is used to record the deformation of the impacted composite specimens. A numerical finite- element (FE) model, in which Hashin’s theory is employed for composite modelling and Smooth Particle Hydrodynamics (SPH) method is used for modelling the gelatine projectile and is developed to simulate the soft impact on the composite laminates. The capability of the developed model is validated using the gas-gun experimental results. Good agreement has been shown between the predictions from using the FE model and the experimental results. ICSI 2019 The 3rd International Conference on Structural Integrity Experimental and numerical studies on the behaviour of fibre reinforced composites subjected to soft impact loading Haibao Liu a , Jun Liu a , Cihan Kaboglu a , Hui Chai b , Xiangshao Kong c , Bamber R.K. Blackman a , Anthony J. Kinloch a,* , John P. Dear a, * a Department of Mechanical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK b The First Aircraft Institute, No.1 East Renmin Road, Yanliang D istrict, Xi’an, Shaanxi 710089, People's Republic of China c Departments of Naval Architecture, Ocean and Structural Engineering, School of Transportation, Wuhan University of Technology, Wuhan, Hubei 430063, People's Republic of China. Abstract This paper presents detailed experimental and numerical studies on the behaviour of composite laminates subject to impact loading by soft objectives. In this research, gas-gun experiments employ woven carbon fibre reinforced poly (ether-ether ketone) (CF/PEEK) and gelatine projectiles to study the response of composite laminates under soft impact loading. A hi h-speed camera is employed to capture the deformation of the projectiles and a three di ensional (3D) Digital Image Correlation (DIC) syste is used to record the deformation of the impacted composite speci ens. A numerical finite- element (FE) odel, in which Hashin’s theory is employed for composite modelling and Smooth Particle Hydrodynamics (SPH) method is used for modelling the gelatine projectile and is developed to simulate the soft impact on the composite laminates. The capability of the developed model is validated using the gas-gun experi ental results. Good agreement has been shown between the predictions from using the FE model and the experimental results.

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers.

Keywords: Thermoplastic composites; Soft impact; Digital Image Correlation; Numerical modelling Keywords: Thermoplastic composites; Soft impact; Digital Image Correlation; Numerical modelling

1. Introduction 1. Introduction

With their increasing application in the aircraft industry, polymer-matrix fibre-reinforced composite materials have attracted much attention from both academia and industry. On the basis of an appropriate lay-up design, such With their increasing application in the aircraft industry, polymer-matrix fibre-reinforced composite materials have attracted much attention from both academia and industry. On the basis of an appropriate lay-up design, such

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers.

2452-3216  2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers. 10.1016/j.prostr.2019.08.132