Papers by Keyword: Sandwich Sheet

Abstract: Bending of multilayered sheets like lightweight sandwich sheets or fiber reinforced thermoplastics is dominated by the mechanism of interply-slip. FE-analysis is performed to predict defects depending on this mechanism. The shear and damage behavior of the adhesive layer of sandwich sheets can be modeled by cohesive elements in Abaqus. Forming simulation of fiber reinforced thermoplastics requires coupled thermo-mechanical analysis methods due to temperature dependence. For this, alternative modeling strategies for the inner layer of adhesive or polymer matrices will be tested in this paper that are able to transfer heat. The layer will be presented by solid elements with enriched property definitions or viscoplasticity. Furthermore the thickness of the layer will be neglected and replaced by contact formulations or spring elements.

Abstract: This study performs DEFORMTM 3D three-dimensional finite element simulations to analyze the plastic deformation of A1100 / A3003 sandwich sheets during rolling. The finite element code is based on a rigid-plastic model, and the simulations in this study assume that the rollers are rigid bodies and that the deformation-induced change in temperature during rolling is negligible. The rolled product comprises a central sheet of A1100 aluminum alloy sandwiched between upper and lower sheets of either A3003 or A6063 aluminum alloy. The simulations examine the effects of sheet thickness and reduction ratio on the maximum effective stress, maximum effective strain, Y-direction load, and maximum damage induced within the rolled product. This study also compares the simulation results for the final thicknesses of the three layers in the rolled A1100 / A3003 (A6063) sandwich sheet with experimental measurements and bonding conditions.