Development of a Calculation Model for Load Introduction Elements Integrated During FRP Sandwich Structure
Due to their high lightweight potential, FRP sandwich structures with foam cores are becoming increasingly important in the automotive industry. In order to accommodate local forces, load introduction elements are required. This work is part of a project in which the geometry is optimized for maximum load capacity, while taking into consideration the cost and the process restrictions. This paper deals with the creation of a suitable FEM model for investigating the effects of geometrical changes of the load introduction element on the load capacity. For this purpose, parameters of the foam and the insert material are determined experimentally. Subsequently, simulation examples are constructed using different solution methods, then compared and evaluated for applicability for an automatic optimization process. The result of the work shows that particularly three-dimensional models, which are explicitly solved, can deliver good results. The simulation results correspond very well to the experimentally determined tensile test curves.
Authors: Jan Schwennen, Daniel Kupzik, and Juergen Fleischer
Conference: SAMPE Seattle 2017