Stress homogeneity in adhesive layer of composite double lap joint under dynamic shear loading
Pascales Saleh, Georges Challita, Rachad Hazimeh, Khaled Khalil
Quarterly No. 2, 2015 pages 101-106
DOI:
keywords: stress homogeneity, impact, adhesive, composite adherents, finite element
abstract The main purpose of this work is to numerically investigate the shear stress homogeneity in the adhesive layer of a double lap joint specimen subjected to dynamic shear loading using the Split Hopkinson Pressure Bar technique (SHPB). This homogeneity is measured through a coefficient defined by the ratio of the standard deviation over the average shear stress in the adhesive layer. Three types of fiber textures of carbon-epoxy composite adherents were examined: unidirectional laminates, 2.5 D interlock H2 and 3D orthogonal. The influence of many parameters related to the adhesive was studied for the three types of composite adherents. For the same percentage of carbon fibers, it was found that the unidirectional composite substrates give the best homogeneity. Moreover, a thicker, shorter and softer adhesive layer ensures the best shear stress homogeneity for all the three types of substrates. The software used for this study is ABAQUS.