Body optimization approach of sedan structure for improving small overlap impact rating

Xi Liu, Rui Liang, Yuanzhi Hu, Chengyue Jiang, Xuebang Tang, Christophe Bastien

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)
    254 Downloads (Pure)


    Small overlap accidents of sedans often result in severe injuries. In this article, a crashworthiness design method, including engine-room energy management, suspension safety design and passenger compartment enhancement, was evaluated to improve the small overlap rating based on finite element simulation. Longitudinal reinforcement and shotgun redesign techniques were proposed to increase energy-absorption and decrease the impact force that transferred to the passenger compartment. The response surface methodology was utilized to propose the optimal passenger compartment parameters in order to reduce intrusion. The evaluation of the sedan structure performance was conducted by comparing simulated intrusion results with the rating guidelines of the Insurance Institute for Highway Safety (IIHS). The optimal results indicated that the intrusion was decreased by an average of 58.64%, with a minimum percentage of 44.98% around footrest area, and the measurement points for intrusion was upgraded to good. The proposed crashworthiness design approach is effective in vehicle structure optimization for better small overlap impact performance
    Original languageEnglish
    Pages (from-to)182-190
    Number of pages9
    JournalInternational Journal of Crashworthiness
    Issue number2
    Early online date14 Dec 2019
    Publication statusPublished - 2021

    Bibliographical note

    This is an Accepted Manuscript of an article published by Taylor & Francis in International Journal of Crashworthiness on 14/2/2019, available online:

    Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.


    This article was supported by 2015 Chongqing Foundation and Frontier Research Program Funding Project (cstc2015jcyjA00048) and the Science and Technology Research Program of Chongqing Municipal Education Commission (Grant No. KJQN201901141).


    • sedan body optimization
    • small overlap impact
    • finite element model
    • crashworthiness analysis


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