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.
|Title of host publication||Advanced Vehicle Technologies|
|Publisher||American Society of Mechanical Engineers (ASME)|
|Number of pages||8|
|Publication status||Published - 2000|
|Event||ASME 2000 International Mechanical Engineering Congress and Exposition, IMECE 2000 - Orlando, United States|
Duration: 2000 Nov 5 → 2000 Nov 10
|Name||ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)|
|Conference||ASME 2000 International Mechanical Engineering Congress and Exposition, IMECE 2000|
|Period||00/11/5 → 00/11/10|
Bibliographical noteFunding 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.
© 2000 American Society of Mechanical Engineers (ASME). All rights reserved.
All Science Journal Classification (ASJC) codes
- Mechanical Engineering