This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Application of Elastomeric Buckling Columns in an Energy Management Bumper System
Annotation ability available
Sector:
Language:
English
Abstract
In an Energy Management Bumper System (EMBS) maximum energy-absorption efficiency is achieved with a “square wave” load/deflection response. The laboratory and barrier impact tests conducted in this study show that elastomeric columns provide essentially square wave response during the buckling stage of column deflection. Of the materials tested, high diene-low Mooney EPDM (terpolymer of ethylene, propylene and a diene) materials fabricated into hollow cube absorber units exhibited square wave efficiencies of 85-90% and were found to be the most suitable elastomers for an EMBS application.
The efficient use of the elastomeric absorbers in an EMBS was accomplished by placing a metal face plate in front of the units to distribute the impact force across the face of the vehicle. This concept was applied to an engineering design for a 3000 lb. vehicle EMBS that would handle impacts at 5 mph in compliance with Federal Motor Vehicle Safety Standard No. 215.
Recommended Content
Technical Paper | Front Impact Evaluation of Primary Structural Components of a Composite Space Frame |
Technical Paper | Numerical Modelling of Tube Crush with Experimental Comparison |
Technical Paper | Crash Analysis of Thin Walled Beam-Type Structures |
Authors
Citation
Tundermann, J., Larson, G., and Anderson, R., "The Application of Elastomeric Buckling Columns in an Energy Management Bumper System," SAE Technical Paper 750011, 1975, https://doi.org/10.4271/750011.Also In
References
- Byars, E. F. Snyder, R. D. “Engineering Mechanics of Deformable Bodies,” 2nd International Textbook 1969
- Timoshenko, S. P. Gere, N. M. “Theory of Elastic Stability” 2nd McGraw-Hill 1961
- Van Brock, J. A. “Column Formula for Materials of Variable Modulus” The Engineering Journal Canada December 1945
- Davey, A. B. Payne, A. R. “Rubber in Engineering Practice” Applied Science Publishers, Ltd. London 1964
- “Handbook of Molded and Extruded Rubber Goodyear 3rd 1969
- Puydak, P. C. Druse, D. F. Auda, R. S. “The Dynamic Load Bearing Characteristics of Butyl Rubber Used in Compression and Shear,” Exxon 1969
- McPherson, A. T. Klemin, A. “Engineering Uses of Rubber,” Reinhold 1956
- Hazelton, D. R. Puydak, P. C. “Compounding EPDM for Dynamic Applications,” Rubber Chemistry and Technology Sept. 1971
- Golze, R. R. Kienle, R. F. “Bumper Design, Materials and Fabrication,” SAE paper 730030 Jan. 1973
- Hintzen, H. Dunleavy, R. A. “An Energy Absorbing Elastomeric Bumper” SAE paper 730027 Jan. 1973
- Seiffert, U. Kirschner, P. “1974 VW Energy Absorbing Bumper System” SAE paper 730033 Jan. 1973
- Withrow, J. D. Renneker, D. N. “The 1973 Chrysler Energy Absorbing Bumper System,” SAE paper 720491 May 1972
- Timpner, F. F. “Vehicle Impact Analysis,” SAE paper 710540 June 1971
- Weller, P.A. “Urethane Energy Absorbers for Automobile Bumpers,” SAE paper 730025 Jan. 1973
- Slessor, J. M. Rusch, K. C. Pett, R. A. “The 1973 Ford Impact Absorbing Bumper System,” SAE paper 730032 Jan. 1973
- Taylor, D. P. “Application of the Hydraulic Shock Absorber to a Vehicle Crash Protection System,” SAE paper 710537 June 1971