Ballistic impact velocity response of carbon fibre reinforced aluminium alloy laminates for aero-engine

AEROS Conference 2017

Mohammed, I.^1,2 ; Talib, A.R. Abu^1,3 ; Sultan, M.T.H.^1,3 ; Saadon, S.^1

Department of Aerospace Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Selangor, Malaysia^1

Department of Mechanical Engineering, College of Engineering, Hassan Usman Katsina Polytechnic, Katsina, Nigeria^2

Aerospace Manufacturing Research Centre, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Selangor, Malaysia^3

关键词: Compression machines;    Fibre Metal Laminates;    Fibre reinforced;    High specific strength;    High speed video cameras;    Maintenance and operation;    Perforation energy;    Residual velocity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/270/1/012026/pdf
DOI  :  10.1088/1757-899X/270/1/012026

来源: IOP

【 摘 要 】

Aerospace and other industries use fibre metal laminate composites extensively due to their high specific strength, stiffness and fire resistance, in addition to their capability to be tailored into different forms for specific purposes. The behaviours of such composites under impact loading is another factor to be considered due to the impacts that occur in take-off, landing, during maintenance and operations. The aim of the study is to determine the specific perforation energy and impact strength of the fibre metal laminates of different layering pattern of carbon fibre reinforced aluminium alloy and hybrid laminate composites of carbon fibre and natural fibres (kenaf and flax). The composites are fabricated using the hand lay-up method in a mould with high bonding polymer matrix and compressed by a compression machine, cured at room temperature for one day and post cure in an oven for three hours. The impact tests are conducted using a gun tunnel system with a flat cylindrical bullet fired using a helium gas at a distance of 14 inches to the target. Impact and residual velocity of the projectile are recorded by high speed video camera. Specific perforation energy of carbon fibre reinforced aluminium alloy (CF+AA) for both before and after fire test are higher than the specific perforation energy of the other composites considered before and after fire test respectively. CF +AA before fire test is 55.18% greater than after. The same thing applies to impact strength of the composites where CF +AA before the fire test has the highest percentage of 11.7%, 50.0% and 32.98% as respectively compared to carbon fibre reinforced aluminium alloy (CARALL), carbon fibre reinforced flax aluminium alloy (CAFRALL) and carbon fibre reinforced kenaf aluminium alloy (CAKRALL), and likewise for the composites after fire test. The considered composites in this test can be used in the designated fire zone of an aircraft engine to protect external debris from penetrating the engine shield due to higher values of impact strength and specific perforation energy as highlighted by the test results.