The response of aluminium/GLARE hybrid materials to impact and to in-plane fatigue

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:523

Article

Bagnoli, F.²  Bernabei, M.²  Figueroa-Gordon, D.¹  Irving, P. E.¹ 

[1] Cranfield Univ, Dept Mat, Cranfield MK43 0AL, Beds, England

[2] Prat Mare Airport, Flight Test Ctr, Dept Chem, I-00040 Rome, Italy

关键词: Bonded hybrids;    Damage tolerance;    Fatigue crack growth;    Fibre metal laminates;    Impact;   

DOI  :  10.1016/j.msea.2009.05.055

来源: Elsevier

【 摘 要 】

Fibre metal laminates (FMLs), such as glass reinforced aluminium (GLARE), are a family of materials with excellent damage tolerance and impact resistance properties. This paper presents an evaluation of the low velocity impact behaviour and the post-impact fatigue behaviour of GLARE laminate adhesively bonded to a high strength aluminium alloy substrate as a fatigue crack retarder. The damage initiation, damage progression and failure modes under impact and fatigue loading were examined and characterised using an ultrasonic phased array C-scan together with metallography and scanning electron microscopy (SEM). After impact on the substrate, internal damage to the GLARE bonded on the opposite side of the substrate occurred in the form of fibre and matrix cracking. No delamination was detected at the GLARE/substrate bond. Before impact the bonded GLARE strap caused reductions in substrate fatigue crack growth rate of up to a factor of 5. After impact the retardation was a factor of 2. The results are discussed in terms of changes to the GLARE stiffness promoted by the impact damage. (C) 2009 Elsevier B.V. All rights reserved

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