Collaborative Optimization of Vehicle Crashworthiness under Frontal Impacts Based on Displacement Oriented Structure

Xi Liu, Rui Liang, Yuanzhi Hu, Xuebang Tang, Christophe Bastien, Ruibin Zhang

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Frontal impacts are the most frequent crash types and may generate extreme body in white (BIW) deformations. Vehicles are subjected to impact evaluation rating protocols such as 100 % Front Rigid Barrier (FRB) impact, 40 % Offset Deformable Barrier (ODB) impact and 25 % overlap (small overlap) impact. This paper proposes a collaborative optimization process using optimal Latin hypercube design (Opt LHD) and response surface methodology (RSM), to improve the vehicle crashworthiness in the frontal impacts, by considering displacement oriented structure (DOS). Upper and lower engine bay structure were considered herein to increase the lateral vehicle displacement during small overlap impact and decrease the impact force that transferred to the passenger compartment in the frontal impacts. The optimal results indicated that the acceleration of the B-pillar was reduced 0.4g in the FRB impact, the intrusion of the firewall was reduced by 55.13 % in the ODB impact, and the intrusion of passenger compartment during small overlap impact was decreased by an average of 53.88 %, with a maximum percentage of 71.41 % around left toepan, leading to an IIHS rating to acceptable from poor. The proposed crashworthiness design approach is effective in vehicle structure optimization for better frontal impacts performance.

Original languageEnglish
Pages (from-to)1319-1335
Number of pages17
JournalInternational Journal of Automotive Technology
Volume22
Issue number5
Early online date26 Sep 2021
DOIs
Publication statusPublished - Oct 2021

Bibliographical note

Funding Information:
This paper is supported by the Improving Project of Basic Scientific Research Ability for Young and Middle-aged College Teachers in Guangxi (Grant No.2019K Y0819) and the Scientific Research Funds of Guilin University of Aerospace Technology (Grant No. XJ20KT15).

Publisher Copyright:
© 2021, KSAE.

Keywords

  • Collaborative optimization
  • Displacement oriented structure
  • Frontal impacts
  • Lateral translation
  • Vehicle crashworthiness

ASJC Scopus subject areas

  • Automotive Engineering

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