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| Stamoulis, Georgios; Carrere, Nicolas; Cognard, J. Y.; Davies, Peter; Badulescu, Claudiu. |
| The use of adhesively bonded structures is widespread in various engineering fields, as they provide many advantages over other conventional types of mechanical joints. In this study, we use a crash optimized, single-component epoxy adhesive (SikaPower®-498 made of a rigid epoxy matrix containing soft, tough polymer inclusions that provide additional ductility to the adhesive layer) at a constant layer thickness of 0.5 mm to bond metallic substrates. We investigate its fracture properties under mode I and mixed-mode I/II loadings, in order to obtain the full fracture envelope. Mode I loading has been performed using the ISO 25217 standard: the substrates were designed according to the TDCB (Tapered Double Cantilever Beam) geometry, and the fracture... |
| Tipo: Text |
Palavras-chave: Fracture toughness; Linear Elastic Fracture Mechanics (LEFM); Adhesive bonding; Finite Element Analysis (FEA); Failure criterion. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00181/29273/27685.pdf |
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| Ilioni, Alin; Le Gac, Pierre-yves; Badulescu, Claudiu; Thévenet, David; Davies, Peter. |
| This article describes an approach to predict the behaviour of an epoxy adhesive in bulk form in a marine environment. First, the material, the experimental conditions and the predictive framework are described. Then the experimental results are presented, which indicate that the effects on yield stress of either a uniform water profile or elevated testing temperature can be shown to be equivalent when plotted versus T-Tg. Moreover, a discussion of these results shows how they can be used to predict changes in the mechanical properties of the adhesive. Prediction results for yield stress are in good agreement when they are compared with experimental results for the case of a water profile gradient, in order to evaluate the relevance and limitations of the... |
| Tipo: Text |
Palavras-chave: Epoxide; Water ageing; Glass transition temperature; Mechanical properties of adhesives; Plasticisation. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00419/53052/54052.pdf |
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