This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Crashworthiness Enhancement in a Car-Truck Collision Using Energy Dissipative Under-ride Guard
Annotation ability available
Sector:
Language:
English
Abstract
A concept of an under-ride guard comprising an energy dissipater is proposed to enhance the crashworthiness of the light-weight vehicles involved in collisions with heavy freight vehicles. The proposed energy absorbing under-ride guard is analytically modeled incorporating non-linearities due to asymmetric damping, stiffness and kinematics of linkages, using the principles of conservation of momentum and Lagrangian dynamics. A performance criteria based upon the magnitude of intrusion of the car mass, car mass acceleration, and dissipated energy is formulated to investigate the performance benefits of the proposed guard. A multi-variable design optimization is performed to minimize a weighted function of performance variables and to determine the optimal asymmetric damping and stiffness properties of the guard. The performance characteristics of the proposed guard are evaluated under direct impact at different speeds, and compared with those derived for a conventional rigid under-ride guard using DYNA3D. The results are discussed to highlight the performance potentials of the proposed guard.
Recommended Content
Authors
Citation
Mahesh, B., Subhash, R., and Van, H., "Crashworthiness Enhancement in a Car-Truck Collision Using Energy Dissipative Under-ride Guard," SAE Technical Paper 962211, 1996, https://doi.org/10.4271/962211.Also In
References
- Riley, B.S. “Fatal accidents involving heavy goods vehicles,” VDI-Berichte Nr. 367 1980
- Seiff, Hank “Large Truck Accidents Exposure in the US,” Proc. of the OECD Symp. on Role of Heavy Freight Vehicle in Traffic Accidents Montreal 1987
- Burger, H. VDI-Berichte Nr. 367 1980
- Murray, N.W.
- Beermann, H.J. “Behavior of Passenger Cars on Impact with Under-ride Guards,” Int. J. of Vehicle Design 5 1 2 1984
- Thomson, W.T. “Theory of Vibrations with Applications,” 3rd Printice Hall Inc. New Jersy
- SAE Handbook 3 34 227 1993
- Whirley, R.G. DYNA3D User's manual Lawrence Livermore National Laboratory