Three-dimensional nonlinear analysis of adhesively bonded lap joints considering viscoplasticity in adhesives

Numerical analysis of edge effects in adhesively-bonded assemblies application to the determination of the adhesive behaviour

“…Adhesive joints often show strongly non-linear behaviour [8,11], so it is interesting to take this phenomenon into account, particularly in order to analyse the influence on the stress distribution. Experimental tests, for the Redux 420 epoxy adhesive have shown that the behaviour of this adhesive in a bonded joint is quite complex (anisotropic viscoplastic behaviour), therefore, a specific model is being developed to describe experimental observations [15]: for instance, at failure it can be noted that the tangential displacement is larger than the normal one.…”

“…Moreover, as the adhesive layer is very thin with respect to the dimensions of the structure, there can be interactions between the two interfaces. Precise finite element computations are therefore useful to analyse the stress singularities in order to optimize the design of adhesively-bounded assemblies [11]. Numerous studies have been proposed to reduce the stress concentration, especially in the case of lap joints, such as effects of spew and chamfer size [12], influence of slots [13], etc.…”

Adhesively-bonded Patch Repair with Composites

“…Due to the rapid growth of aerospace industry, analyses of adhesively-bonded patches to repair cracked structures have been the focus for many years. Most of these studies investigated repaired structures using linear analysis and demonstrated the viability of adhesively-bonded patch-repairs as a means to improve the durability and damage tolerance of cracked metallic structures effciently and economically [1][2][3][4][5][6] . The Aeronautical and Maritime Research Laboratory researched the bonded patch method 7 in the early 1970s.…”

Effect of thermal expansion coefficient on the stress distribution in solar panel

“…For example, the temperature changed from À101 to 93 1C when the spacecraft in low-orbit, and the temperature changes more greatly when the spacecraft is in high-orbit. The solar panel will produce thermal stresses under the function of the space temperature field, which influence the dependability of the spacecraft and service life because of the different thermal expansion coefficients and elastic moduli resulting from the adhesion with many kinds of materials in the solar panel [3][4][5][6][7][8][9].…”