Optimum design of an a-pillar trim with rib structures for occupant head protection

Hyoung Gon Kim, Shinill Kang

Research output: Chapter in Book/Report/Conference proceedingConference contribution


NHTSA (National Highway Traffic Safety Administration) has been conducting biomechanical studies to reduce head injuries sustained during automotive collision. Furthermore, NHTSA added the new regulation to the FMVSS201 (Federal Motor Vehicle Safety Standard), limiting the equivalent HIC(Head Injury Criterion) value under 1000. In the present study, a methodology is developed for the optimum design of the A-pillar trim with rib structures, which can maximize the energy dissipation during the head impact. The design variables for the rib structures are the transverse spacing, the longitudinal spacing, and the thickness. The required set of design variables is decided on the bases of the design of experiments. A series of simulations for head impact to A-pillar trim are carried out by using the LS-DYNA3D, and the HIC(d) values are computed using results from simulations, which utilize design variables determined by a combination of the central composite design and the full factorial design. A proper regression function with R-square value above 0.9 was constructed using the response surface method, and it was used as an objective function for optimization. A HIC(d) value under 850 for 15mph head-trim impact was obtained using the rib structures suggested by the present design methodology.

Original languageEnglish
Title of host publicationAdvanced Vehicle Technologies
PublisherAmerican Society of Mechanical Engineers (ASME)
Number of pages8
ISBN (Electronic)9780791819036
Publication statusPublished - 2000
EventASME 2000 International Mechanical Engineering Congress and Exposition, IMECE 2000 - Orlando, United States
Duration: 2000 Nov 52000 Nov 10

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)


ConferenceASME 2000 International Mechanical Engineering Congress and Exposition, IMECE 2000
Country/TerritoryUnited States

Bibliographical note

Funding Information:
This work was funded by Korea Research Foundation and authors are grateful for the support. Authors are also grateful for the helpful discussions with Dr. Junghwa Hong at Delphi, USA, and Dr. Dong-Seok Kim at Vehicle Safety Development Team, Daewoo Motor Co., Ltd.

Publisher Copyright:
© 2000 American Society of Mechanical Engineers (ASME). All rights reserved.

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering


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