Damage tolerance of an architected adhesive joint

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:132

Article

Maloney, Kevin¹  Fleck, Norman¹ 

[1] Univ Cambridge, Engn Dept, Trumpington St, Cambridge CB2 1PZ, England

关键词: Patterned interfaces;    Elastomers;    Adhesive joint;    Cavitation;    Toughening;   

DOI  :  10.1016/j.ijsolstr.2017.06.010

来源: Elsevier

【 摘 要 】

Butt joints have been manufactured from aluminium alloy substrates of interlocking square-wave architecture and silyl-modified polymer (SMP) adhesive. The macroscopic traction versus opening separation responses of the butt joints have been measured for selected values of square-wave amplitude and thickness of adhesive layer. Insight into the failure mechanisms of the square-wave joint is obtained by performing tensile tests on planar butt joints and by performing double-lap shear tests on planar joints. The mechanisms of adhesive failure in a planar butt joint are determined by micro X-ray computed tomography. It is determined by optical fractography that the failure mechanisms in the square-wave joint are a combination of those observed in the butt and double-lap shear joints, and consequently a simple model for the strength and toughness of the square-wave joint is developed. A design map is constructed for the strength, toughness and damage-tolerance of the square-wave micro-architecture in order to generate the optimal topology for a given application. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

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