Application of Light Weight Structural Foams for Crashworthiness of In-Production Passenger Cars
Published October 23, 2005 by The Automotive Research Association of India in India
Annotation of this paper is available
Event: International Mobility Engineering Congress & Exposition 2005 - SAE India Technology for Emerging Markets
There is a continuous effort in enhancing the automobile crashworthiness while also trying to reduce weight. This up-gradation is even more difficult if the vehicle is in production due to additional constraints of production feasibility. Higher strength steels and add-on reinforcements are typical measures taken in such circumstances. Even these modifications require manufacturing setup changes and may lead to increase in product weight.
One of the critical issues in automotive safety is to ensure passenger compartment integrity which is sometimes compromised due to section shape failure of a critical member. New concepts using structural foams have been introduced for increased strength. These materials work by avoiding collapse of critical sections and have the potential to provide adequate section strength with minimum mass penalty.
This paper presents a Finite Element based case study on the application of structural foam at critical member of a passenger car and potential of enhancing crash safety. In the initial part of this case study, first correlation of component test data with Finite element simulation was carried out for material validation. This material model is later used in FE analysis to study the effect of foam in A-pillar area (BIW) of an existing production car.
CitationChalipat, S., Kshirsagar, S., and Gokhale, A., "Application of Light Weight Structural Foams for Crashworthiness of In-Production Passenger Cars," SAE Technical Paper 2005-26-327, 2005, https://doi.org/10.4271/2005-26-327.
- Lilley Kurt & Mani, A. “Roof-Crush Strength Improvement Using Rigid Polyurethane Foam”, Topics in Vehicle safety technology, SAE SP-1139, 1996.
- Liu, Wenlung Weber E. & Stephan Koch, Philip “Validation of Epoxy foam for Structural and crash application”, Advances in modeling of Materials and structures for crash applications, SAE SP-1843, 2004.
- Avalle, M. Belingardi G. & Montanini, R. “Characterization of Polymeric Structural foam Under Compressive Impact Loading by Means of Energy Absorption Diagram”, International Journal of Impact Engineering, 2001
- subhash, Ghatu Liu Qunli & Gao, Xin-lin “Quasistatic and High Strain rate Uni-axial Compressive Response of Polymeric Structural Foams”, International Journal of Impact Engineering, Article in press.
- Casey Kevin & Weber, Philip E. “Expandable Epoxy Foam: A Systematic Approach to Improve Vehicle Performance”, Advances in modeling of Materials and structures for crash applications, SAE SP-1843, 2004.
- LS-DYNA Keyword User’s Manual, Version 970, April 2003.