Evaluation of quivalent Stiffness for the Extruded Aluminum corrugated Core Sandwich Panel Incorporated in Light-weight Railway Vehicles Car Bodies

초록

This study discussed the equivalent stiffness of an extruded aluminum corrugated core sandwich panel incorporated in lightweight railway vehicles car bodies. Simple analytical equations proposed by C？t？ were examined through comparing numerical results. Five FE simulations were carried out in order to obtain the directional core properties, E11, E22, E33, G12, G23. The FE models included core and plates modeled by 2D shells discretely, namely discrete modeling. And then, the accuracy of the simple analytical expressions was verified by comparing with the FE results. For more verification, several material tests and a three-point bending test on the sandwich panel were also simulated using homogenized core models having the equivalent properties. Consequently, the results were in good agreement with the FE simulations of the discrete models. It was concluded that homogenized models employing simple analytical expressions could help the initial design of lightweight railway vehicles car bodies.