An Experimental/Numerical Study on the Interfacial Damage of Bonded Joints for Fibre-Reinforced Polymer Profiles at Service Conditions

Abstract

Abstract:In this paper a study on double lap joints made of glass fibre-reinforced polymer (GFRP) adherents and an epoxy resin as a glue is performed. Both an experimental procedure and a theoretical model with an associated numerical discretization are presented. Experimental and numerical results are discussed and compared. They indicate the possibility of performing an advanced mechanical analysis of adhesive joints based on a preliminary characterization of a few mechanical parameters.

Towards nonlinear imperfect interface models including micro-cracks and smooth roughness

“…The results of present paper are expected to find applications in different contexts, especially for modeling the complex behavior of nonlinear or piezoelectric adhesives [14,25,46], of imperfect bonding in composites [5,26,28,33], and quasi-brittle interfaces in masonry structures [36,38,39].…”

“…2 Homogenization scheme for micro-cracked interphase media. The homogenized interphase is then treated by the asymptotic method in order to obtain the stiffnesses matrix 33 of the imperfect-interface law Note also that, in two dimensions, the normal stiffness and the tangential stiffness take the form In the second example of cracked material, we introduce a dilute homogenization scheme or a dilute estimate [4]. Note that other effective coefficients can be found in the literature (see [35] for example).…”

Derivation of a model of imperfect interface with finite strains and damage by asymptotic techniques: an application to masonry structures

“…A pseudo-potential of dissipation φ is considered [12]. As proposed in former papers [4,32], the chosen pseudo-potential is given by the sum of a quadratic term and a positively 1-homogeneous functional, as a result the dissipative character will be directly related to a rate-dependent and a rate-independent contributions:…”

“…Similarly to the numerical approach in [32], by approximating the first derivative of the damage parameter with respect to time asl ≈ …”

Modelling of a GFRP adhesive connection by an imperfect soft interface model with initial damage

“…Then in a second section the imperfect interface model is described. This model is derived by an asymptotic analysis [27] on a micro cracked adhesive based on Kachanov assumptions [28] [29] successfully applied to composites materials [30,31,32]. The Kachanov theory consists to consider in a micro cracked adhesive the following main assumptions: a non interaction between the crack, a constant stress vector along the crack, and to ignore the effect of the crack edge in the stress field.…”