Browse Publications Technical Papers 2004-01-1185
2004-03-08

Analytical Model for Investigating Low-Speed Sideswipe Collisions 2004-01-1185

Vehicle dynamics in sideswipe collisions are markedly different from other types of collisions. Sideswipe collisions are characterized by prolonged sliding contact, often with very little structural deformation. An analytical model was developed to investigate the vehicle dynamics of sideswipe collisions. The vehicles were modeled as rigid bodies, and lateral interaction between the vehicles was modeled with a linear elastic spring. This linear spring was meant to represent the combined lateral stiffness of both vehicles before significant crush develops. Longitudinal interaction between the vehicles was modeled as frictional contact. In order to validate the model, seven (7) low speed (3 - 10 kph), shallow angle (15°) sideswipe collisions were staged with instrumented vehicles. These sideswipe collisions were characterized by long contact durations (∼ 1 s) and low accelerations (< 0.4 g's). The experimental collisions were also simulated with EDSMAC. EDSMAC overpredicted peak longitudinal vehicle acceleration by an average of 83% and underpredicted the length of contact damage by an average of 50%. In contrast, the linear spring model accurately predicted the peak longitudinal vehicle acceleration (5% error) when the stiffness parameter was tuned to match the length of contact damage. These results suggest that a non-crush-based linear spring model for calculating inter-vehicular force could significantly improve the accuracy of reconstructions of low speed sideswipe collisions compared to existing methods such as SMAC.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Practical Analysis Technique for Quantifying Sideswipe Collisions

1999-01-0094

View Details

TECHNICAL PAPER

Vehicle and Occupant Response in Heavy Truck to Passenger Car Sideswipe Impacts

2001-01-0900

View Details

TECHNICAL PAPER

Speed Determination in Car-Truck Sideswipe Collisions

2000-01-0463

View Details

X