Empirical rheological model for rough or grooved bonded interfaces.
In the industrial sector, it is common to use metal/adhesive/metal structural bonds. The cohesion of such structures can be improved by preliminary chemical treatments (degreasing with solvents, alkaline, or acid pickling), electrochemical treatments (anodising), or mechanical treatments (abrasion, sandblasting, grooving) of the metallic plates. All these pretreatments create some asperities, ranging from roughnesses to grooves. On the other hand, in damage solid mechanics and in non-destructive testing, rheological models are used to measure the strength of bonded interfaces. However, these models do not take into account the interlocking of the adhesive in the porosities. Here, an empirical rheological model taking into account the interlocking effects is developed. This model depends on a characteristic parameter representing the average porosity along the interface, which considerably simplifies the corresponding stress and displacement jump conditions. The paper deals with the influence of this interface model on the ultrasonic guided modes of the structure.
Institut Jean Le Rond d'Alembert, Université Pierre et Marie Curie, UMR CNRS 7190, Case 162, 4 Place Jussieu, 75252 Paris Cedex 05, France. vlasie_valentina@yahoo.fr
Valentina Vlasie
VV
Belloncle
Martine
M
Rousseau
D000268:Adhesiveness; D000269:Adhesives / Q000737:chemistry*; D002484:Cementation / Q000379:methods*; D003198:Computer Simulation; D006244:Hardness; D008670:Metals / Q000737:chemistry*; D008956:Models, Chemical; D012212:Rheology / Q000379:methods*; D013499:Surface Properties
D000269:Adhesives; D008670:Metals