Abstract

Analysis of the three-point flexure loading of a symmetric beam configuration consisting of two identical adherends joined by a flexible layer is presented. A closed-form solution is presented in the form of a layer-wise approach, and shows excellent agreement with finite element results. Particular emphasis is given to the global beam compliance. The results show that a thin, shear deformable layer may effectively decouple the responses of the two beams. Furthermore, in contrast to ordinary beams, the presence of an overhang reduces the beam compliance. These effects are quantified and discussed. Experiments on aluminum adherends joined by a rubber layer were conducted over a range of overhang lengths in a three-point flexure fixture, and very good agreement between measured and predicted beam compliance was noted.

Keywords

flexure, interlayer, shear deformation

Authors