A Study on Enhanced Body Structures for Front/Offset/IIHS Overlap Crashes by Small Vehicles

Paper #:
  • 2017-01-1468

Published:
  • 2017-03-28
Author(s):
Abstract:
Previous studies have dealt with the relationship between the injury criteria of dummies and vehicle drop during high-speed head on collisions. Ultimately, vehicle drops are found to worsen the injury criteria of dummies when exceeding 60mm during high-speed crashes. Also, vehicle drops affected the front side member of the vehicle body the most. The present study dealt with methods of improving vehicle drops by enhancing the connective structure of the front side member, the short gun, and the A pillar. Analyses on various vehicles confirm that arch-shaped front side members are an extremely important factor. Furthermore, if the short gun and A pillar are properly connected at the top of the arch shape on the front side member during crashes, the deformation energy of the vehicle could be converted to energy for lifting the A pillar lower. With a so-called body lift structure, BLS has been applied to the B/C segment vehicles of Hyundai and KIA. BL has been developed into the BLS structure by integration with a ring shaped structure that protects passengers from IIHS small overlap collisions. Ring shaped structures consist of the front side member, the dash, and the A pillar. BLR was devised from the TRIZ method. Vehicles with new platforms applying the BLR structure have greatly improved crash performance(vehicle drop, small overlap, offset), and have also been capable of reducing weight by 12.8kg.
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