This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Trailer Rear Impact Protection: Influence of Guard Support Deformation
Technical Paper
2010-01-0227
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Truck-trailers are required to have rear impact protection guards per Federal Motor Vehicle Safety Standards 223 and 224. The standards define the minimum strength and energy absorption requirements at the guard component level, while allowing the guard manufacturer to use a rigid test fixture when certifying the guard. Due to the limitations inherent in “rigidizing” the under-structure of a trailer, often some amount of deformation in the supporting structures is tolerated when certifying a guard. Hence there is a tendency to certify the impact guard as a “guard system” composed of guard members and the support (mounting) structures.
In this paper, a previously validated 1990 Ford Taurus FE model was used to analyze the effect of compliance in the guard support members on its dynamic performance. Two guard systems, one with rigid supports and another with some compliance in the supports were modeled. The two guard systems had the same strength in accordance with the requirements of FMVSS 223. The underride collisions were simulated at various speeds to compare and contrast the performance of the two guard systems. Observations were made as to why the amount of underride was substantially different for the two guard systems.
Recommended Content
Authors
Citation
Iyer, R. and Tavakoli, M., "Trailer Rear Impact Protection: Influence of Guard Support Deformation," SAE Technical Paper 2010-01-0227, 2010, https://doi.org/10.4271/2010-01-0227.Also In
References
- Tomassoni, J. “A look at the NHTSA Minimally Complaint Underride Guard at Impact Speed above 30 mph,” SAE 986077 1998
- Eilas, J. Monk, M. “Heavy Truck Underride Rear Underride Protection - Final Report,” NHTSA 1993
- U.S. Code of Federal Regulations 49 CFR 571.223 “Rear Impact Guard,” 1998
- U.S. Code of Federal Regulations 49 CFR 571.224 “Rear Impact Protection,” 1998
- NHTSA “Heavy Truck Underride Protection,” 1993
- Baczynski, R. Johnson, N. “Development of Compliance Test for Truck Rear Underride Protection - Volume 1- Summary Report,” Dynamic Science. 1980
- Texas Transportation Institute “Performance Upgrading of Commercial Vehicle Rear Underride Guards - Volume 1 - Summary Report,” 1980
- Mariolani, J. Schmutzler, L. “Development of New Guard for Enhancement of Compatibility between Trucks and Cars,” SAE Technical Paper 2001-06-0062 2001
- Mariolani, J. Arruda, A. “Design and Test of an Articulated Rear Guard able to Prevent Car Underride,” SAE Technical Paper 73106 1997
- DeLays, N. Ryder, M. “A Study of Heavy Vehicle Underride Guards,” SAE Technical Paper 710121 1971
- Boucher, D. Davis, D. “A Discussion on Rear Underride Protection in Canada,” SAE Technical Paper 2001-01-3522 2001
- National Crash Analysis Center “1990 Ford Taurus Model,” http://www.ncac.gwu.edu/
- Tavakoli, M. Valliappan, P. Parnesh, A. “Estimation of frontal crush Stiffness Coefficient for Car-to-Heavy truck Underride collisions,” SAE Technical Paper 2007-01-0731 2007
- Tavakoli, M. George, V. “Impact Characteristics of Heavy Truck Rear Impact Guard - Interdependence of Guard Strength, Energy Absorption, Occupant Forces and Passenger Compartment Intrusion,” SAE Technical Paper 2008-01-0155 2008
- NHTSA “NHTSA New Car Assessment Program (NCAP) Frontal Barrier Impact Test of a 1990 4-Door Sedan (35mph),” 1990
- NHTSA “Vehicle Safety Compliance Safety for Occupant Crash Protection,” 1990