This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A Math-Based CAE High-Speed Punch Methodology for Polymer Airbag Cover Design
Technical Paper
2006-01-1187
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Owing to the complex processing effects of injection molding and the influence of the wide-range of in-service conditions (e.g., from -40°C to 90°C) on the performance of polymer airbag covers, the current development of airbag performance criteria is largely conducted on a trial-and-error basis. This paper represents a recently developed virtual engineering tool which uses the LS-DYNA FEA (finite element analysis) solver for predicting the performance of polymer airbag cover designs under high-speed punch tests. The key element of this math-based technology is the method for determination and application of the rate-of-deformation and the temperature dependent material database; namely, Young's modulus, yield point, and ultimate strain. Experimental and virtual high-speed impact punch tests on Tekron 4300D-88A TPE (thermoplastic elastomer) were conducted at -40°C, 13°C, and 90°C with an impact speed of 6.7m/s (15 miles per hour). The comparisons between the experimental data and the CAE simulation results clearly show that the analysis accurately predicts the impact load (force)-time characteristic curves, tear kinematics, and failure mechanisms of the tear seam for an airbag cover during the high-speed impact tests. The findings from this methodology provide useful information for the development of advanced airbag system components, such as air-bag cover materials, pressure sensors, ignition system control, etc., at various temperatures and service conditions. The method has been employed in several driver and passenger airbag cover designs.
Recommended Content
Magazine Issue | SAE Off-Highway Engineering: December 4, 2014 |
Technical Paper | Global Vehicle Architectures Development in the Automotive Industry |
Technical Paper | Investigation of Airbag-Induced Skin Abrasions |
Citation
Lee, M. and Novak, G., "A Math-Based CAE High-Speed Punch Methodology for Polymer Airbag Cover Design," SAE Technical Paper 2006-01-1187, 2006, https://doi.org/10.4271/2006-01-1187.Also In
References
- LS-DYNA Keyword User's Manual 96 March 2001
- Lee, M. C. H. Yoon, S. Chen, J.S. 2000 March SAE 000-01-0295 March 6 2000
- Lee, M. C. H. “A Unified Theory for the Constitutive Behavior of Engineering Materials” Univ. of California at Berkeley 1977
- Lee, M. C. H. “Effects of Degree of Mixing on the Properties of Filled Elastomers” J. App. Polymer. Sci. 29 1984 499
- Lee, M. C. H. “A Unified Theory for Adhesion” adhesive Chemistry-Development and Trends Lee L. H. Plemum, New York 1981 93
- Lee, M. C. H. “The Mechanical Properties and Fractural Morphology of Unidirectional Short-fiber Reinforced Polychloroprene Composites” J. Polym. Eng. 8 257 1988
- Lee, M. C. H. “Design and Applications of Short Fibre Reinforced Rubbers” Short Fibre-Polymer Composites De K. White J. R. Woodhead Cambridge 1996