ACCESS
Assemblies of many materials, especially composites, laminates, interlayers, and assemblies of composites with metals are made preferentially with a structural adhesive. The mechanical behavior of an adhesive thin film, 100 to 500 micrometers of thickness, embedded by adjacent stiff surfaces, is not the behavior of the same free massive material. The plasticity and the rupture of those adhesive films subjected to complex state of stresses can be studied to get the intrinsic properties of the adhesives. Plasticity and rupture criteria depend on the stress invariants I1 (hydrostatic pressure) and J2 (Von Mises equivalent stress). The Arcan-Mines test gives those plasticity and rupture criteria of thin adhesive films when submitted to complex loading. Those criteria are modified Drucker-Prager criteria. The rupture criterion obtained with Arcan-Mines test is compared with results obtained with linear fracture mechanic applied to the fracture of the adhesive film.
structural epoxy adhesive, plasticity and rupture criteria, stress intensity factor
Arcan M., Weissberg V. (1988). A uniform pure shear testing specimen for adhesive characterization. Rapport technique STP 981. American Society for Testing and Materials.
Bassery J., Gantchenko V., Renard J. (2010). Caractérisation multiaxiale des interfaces multimatériaux: application aux assemblages collés. Revue des composites et des matériaux avancés, p. 135-152.
Brethous R. (2013). Assemblages collés modèles à base d’adhésifs nano-structurés : interdiffusion entre des copolymères tri-blocs et une résine époxyde, thèse. Université de Toulouse.
Gilman J.J. (1962). Strength of ceramics crystals. Am. Ceram. Soc. Conf., New York.
Gantchenko V. (1996). Polycopié de cours : TP essais mécaniques. Détermination pour un matériau, par une méthode de vibrations propres, des modules d’élasticité. ISMCM-CESTI.
Krawczak P. (2011). Essais mécaniques des plastiques – Caractéristiques à long terme et ténacité. Techniques de l’ingénieur.
Miannay D.P. (1995). Mécanique de la rupture. Les Éditions de physique.