Low speed bumper impact performance relies on the capability of the energy absorber (EA) to absorb energy efficiently through multiple impacts. Series impacts are typically assessed via physical part testing due to the difficulties of predicting multiple impacts accurately.
This paper describes a predictive engineering method used to assess the performance of injection molded thermoplastic energy absorber systems in multiple impacts.
File Size: 137K
References
Ferfecki F., “A Finite Element Material Model and Method for Predicting the Cumulative Behavior of Energy Absorbing Components in Thermoplastic Bumper Systems Subjected to Multiple Impacts,” SAE Paper 2001-01-0352, 2001
Woods J. T and Trantina G. G., “Material Characterization for predicting Impact Performance of Plastic Parts, SAE Paper 1999-01-3178, 1999.
LS_DYNA Keyword User's Manual Volume II, LSTC Version 960, 2001.
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