Tensile behaviour of three-dimensional carbon-epoxy adhesively bonded single- and double-strap repairs

被引：101
作者：
Campilho, R. D. S. G. [1 ]
de Moura, M. F. S. F. [1 ]
Ramantani, D. A. [1 ]
Morais, J. J. L. [2 ]
Domingues, J. J. M. S. [3 ]
机构：
[1] Univ Porto, Fac Engn, Dept Engn Mecan & Gestao Ind, P-4200465 Oporto, Portugal
[2] CITAB UTAD, Dept Engn, P-5001801 Quinta De Prados, Vila Real, Portugal
[3] Inst Super Engn Porto, Dept Engn Mecan, P-4000072 Oporto, Portugal
来源：
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES | 2009年 / 29卷 / 06期
关键词：
Composites; Finite element stress analysis; Repair; PROGRESSIVE FAILURE ANALYSIS; SCARF REPAIRS; COMPOSITE; STRESS; JOINTS; AIRCRAFT; STRENGTH; DESIGN; INTERFACE; MODELS;
D O I：
10.1016/j.ijadhadh.2009.02.004
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
An experimental and numerical study of the tensile behaviour of three-dimensional carbon-epoxy adhesively bonded strap repairs is presented. Experimentally, the failure mode, elastic stiffness and strength were evaluated for different overlap lengths and patch thicknesses. The numerical simulations, performed in ABAQUS (R), allowed obtaining the elastic stiffness and the patch debonding load, used to understand the repairs behaviour. The adhesive layer was simulated with cohesive elements including a mixed-mode cohesive damage model with trapezoidal traction-separation laws in pure modes I and II, to account for the ductile behaviour of the adhesive used. These laws were determined by an inverse method, which consists on the estimation of the cohesive parameters with a fitting procedure of the experimental and numerical load-displacement curves of the respective fracture characterization test. The pure mode III cohesive law was equalled to the pure mode II one. This numerical methodology was found adequate to reproduce the experimentally observed behaviour of these repairs. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：678 / 686
页数：9
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