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Vehicle Mass and Stiffness: Search for a Relationship
Technical Paper
2004-01-1168
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The effects of vehicle “stiffness” and mass on the occupant response during a crash may be determined by evaluation of accident data. However, “stiffness” and mass may be correlated, making it difficult to separate their effects. In addition, a single-valued “stiffness”, although well defined for linear case, is not well defined for non-linear systems, such as in vehicle crash, making the separation task even more difficult. One approach to addressing the lack of a clear definition of stiffness is to use multiple definitions. Each stiffness definition can then be correlated with mass to look for trends. In this study, such an approach was taken, and the different stiffness definitions were given and their values were obtained from rigid barrier crash test data.
No clear relationship between mass and stiffness appears to exist. All the stiffness measures reviewed show, at best, only a weak correlation with mass. A stiffness analysis among different vehicle types was also carried out. Statistical analyses indicate that the stiffness of different vehicle types and their ranking system depend on the definition of the stiffness.
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Authors
Topic
Citation
Nusholtz, G., Xu, L., Shi, Y., and Di Domenico, L., "Vehicle Mass and Stiffness: Search for a Relationship," SAE Technical Paper 2004-01-1168, 2004, https://doi.org/10.4271/2004-01-1168.Also In
SAE 2004 Transactions Journal of Passenger Cars: Mechanical Systems
Number: V113-6; Published: 2005-07-05
Number: V113-6; Published: 2005-07-05
Vehicle Aggressivity and Compatibility, Structural Crashworthiness, and Pedestrian Safety
Number: SP-1878; Published: 2004-03-08
Number: SP-1878; Published: 2004-03-08
Vehicle Aggressivity and Compatibility; Rollover, Side, and Rear Impact on CD-ROM from the SAE 2004 World Congress
Number: SP-1882CD; Published: 2004-03-08
Number: SP-1882CD; Published: 2004-03-08
References
- ‘A study to improve the crash compatibility between Cars in frontal impact’ Final Report by Transport Research Laboratory to European Commission July 2002
- Kitagawa Y. Makita M. Pal C. ‘Evaluation and Research of Vehicle Body Stiffness and Strength for Car to Car Compatibility’ SAE 2003-01-0908
- Mizuno K. Tateishi K. ‘Evaluation of Passenger Compartment Strength in Car-to-Car Frontal Crashes’ SAE 2003-01-0909
- Edwards M. Davies H Hobbs A. ‘Development of Test Procedures and Performance Criteria to Improve Compatibility in Car Frontal Collisions’ ESV 2003
- Neter Kutner Nachtsheim Wasserman “Applied Linear Statistical Models” Fourth Irwin 1996