Predicted Effect of Structural Geometry and Materials Characteristics on the Mechanical Behavior of a Bi-Material Assembly, Subjected to Bending on a Circular Mandrel

Interfacial (shearing and peeling) stresses in bi-material assemblies, subjected to bending on a circular mandrel, are evaluated, analyzed and discussed. As is known, circular mandrel is regarded by many reliability engineers as an appropriate test vehicle to assess the static and fatigue strength of the attachment material in adhesively bonded or soldered bi-material assemblies, which experience bending deformations because of thermal or external loading. The main purpose of our analysis is to evaluate the effect of structural geometry (assembly length, and thicknesses of the adherends and the adhesive) and materials characteristics (Young's modulus and Poisson's ratio) on the magnitude and distribution of the interfacial stresses.