THE GENERATION OF A MATERIAL MODEL TO REPRESENT THE MECHANICAL BEHAVIOUR OF AN ALIPHATIC POLYETONE (CARILON EP) AT HIGH STRAIN RATE EVENTS AND LOW TEMPERATURES.

Although explicit finite element codes have been used for many years to predict the impact performance of plastic components, there are few papers that detail how the constants for material models were determined and the resulting models validated with experimental test results. Aliphatic polyetone materials appear very attractive materials for the developers of automotive fuel systems. This is principally due to their low fuel permeability and the stringent total vehicle evaporative requirements. This paper presents the analysis and results of the analysis of experimental test data to determine a material model for an aliphatic polyetone (Carilon EP) at high strain rates and low temperatures. Two different material models are compared (Johnson/Cook and Kruphowsky) with respect to their suitability to modelling Carilon EP and the chosen model validated with high speed impact tests.