Analysis of the Influence of Hydrostatic Stress on the Behaviour of an Adhesive in a Bonded Assembly
|Author(s)||Cognard J. Y.1, Creac'Hcadec R.1, Maurice J.1, Davies Peter2, Peleau Michel2, Da Silva L. F. M.3|
|Affiliation(s)||1 : ENSIETA Univ Brest ENIB, LBMS, ENSIETA, F-29806 Brest, France.
2 : IFREMER, Ctr Brest, Mat & Struct Grp, F-29280 Plouzane, France.
3 : Univ Porto, Fac Engn, Dept Engn Mecan, P-4200465 Oporto, Portugal.
|Meeting||3rd International Conference of Adhesion Science and Technology on Advanced Computational Engineering and Experimenting, Rome, ITALY, JUN 22-23, 2009|
|Source||Journal Of Adhesion Science And Technology (0169-4243) (Brill Academic Publishers), 2010 , Vol. 24 , N. 11-12 , P. 1977-1994|
|WOS© Times Cited||26|
|Keyword(s)||Adhesive testing, non-linear behaviour, modelling, hydrostatic stress, finite element analysis|
|Abstract||Generally, adhesives are viscoelastic-plastic materials, for which the development of viscosity and plasticity varies depending on the type of adhesive and the stress state. Various models exist to represent the yield surface, or the so-called elastic limit, taking into account the two stress invariants, hydrostatic stress and von Mises equivalent stress. Moreover, to develop precise pressure-dependent constitutive models, it is necessary to have a large experimental database in order to accurately represent the adhesive strains which are strongly dependent on the tensile-shear loading combination. Under quasi-static loadings, for a given strain rate range viscous effects can be neglected, but only a few experimental results are available to model the behaviour of the adhesive in a bonded assembly accurately under realistic loadings. Moreover, edge effects often have a large influence on the mechanical response. This paper presents the possibility of combining the use of an experimental device, which strongly limits the influence of the edge effects, with a pressure vessel especially designed to study the influence of hydrostatic stress. The latter allows pressures up to 100 MPa to be applied during mechanical testing. Comparisons with results obtained with a modified Arcan device are presented. Such results are useful for the development of 3D pressure-dependent models for the yield function and for the analysis of more complex loading. (C) Koninklijke Brill NV, Leiden, 2010|