Vehicle front structure in consideration of compatibility

Fujii, Shinji; Fukushima, Masanobu; Abe, Akiko; Ogawa, Shigeru; Fujita, Hideharu; Sunakawa, Takayuki; Tanaka, Yukiko

A structure which effectively improves compatibility in a vehicle-to-vehicle frontal impact has been considered focusing on sub-frame structure that disperses applied force with multiple load paths. Evolved sub-frame structure has been studied by CAE with RADIOSS to search the possibility to reduce aggressivity and to improve self-protection at the same time.

Vehicle models used for this compatibility study were a large saloon car with sub-frame and a small family car without sub-frame. The large saloon car had three different front structures: original, forward-extended sub-frame, and original with 25%-stiffness reduced structures. The types of collision contained four different crash modes in a combination of lateral overlap rate difference and side member height difference. With these three different structures in four different crash modes, crash simulations were conducted to evaluate aggressivity and self-protection based on front structure and compartment deformations, energy absorption amount, and Average Height of Force (AHOF).

As a result, it was found that the front structure with forward-extended sub-frame improved both aggressivity and self-protection by prevent ing override effect through structural interaction enhancement.

Year

Entry

2001

Barbat S, Li X, Prasad P. Evaluation of vehicle compatibility in various frontal impact configurations. In: Proceedings of the 17th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 4-7, 2001; Amsterdam, The Netherlands.

2001

Edwards M, Happian-Smith J, Davies H, Byard N, Hobbs A. The essential requirements for compatible cars in frontal collisions. In: Proceedings of the 17th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 4-7, 2001; Amsterdam, The Netherlands.

2001

Faerber E. EEVC research in the field of improvement of crash compatibility between passenger cars. In: Proceedings of the 17th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 4-7, 2001; Amsterdam, The Netherlands.

2001

O’Reilly P. Status report of IHRA vehicle compatibility working group. In: Proceedings of the 17th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 4-7, 2001; Amsterdam, The Netherlands.

2001

Monnet S. PSA’s views on compatibility: a potential two-step approach to improve compatibility among the vehicle fleet. In: Proceedings of the 17th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 4-7, 2001; Amsterdam, The Netherlands.

2001

Barbat S, Li X, Prasad P. A comparative analysis of vehicle-to-vehicle and vehicle-to-rigid fixed barrier frontal impacts. In: Proceedings of the 17th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 4-7, 2001; Amsterdam, The Netherlands.

2001

Summers SM, Prasad A, Hollowell WT. NHTSA’s research program for vehicle aggressivity and fleet compatibility. In: Proceedings of the 17th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 4-7, 2001; Amsterdam, The Netherlands.

2001

Meyerson SL, Nolan JM. Effects of geometry and stiffness on the frontal compatibility of utility vehicles. In: Proceedings of the 17th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 4-7, 2001; Amsterdam, The Netherlands.