0
TECHNICAL BRIEFS

# Study on Structural Lightweight Design of Automotive Front Side Rail Based on Response Surface Method

[+] Author and Article Information
Y. Zhang, P. Zhu, G. L. Chen, Z. Q. Lin

School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Min Hang, Shanghai 200240, China

J. Mech. Des 129(5), 553-557 (Jun 09, 2006) (5 pages) doi:10.1115/1.2712223 History: Received December 14, 2005; Revised June 09, 2006

## Abstract

Nowadays, vehicle lightweight design is a main topic in automotive industry. Crashworthiness, which is the most important performance of a full vehicle, must be always satisfied in the study on body lightweight design. This paper presents research, from the point of view of safety, of structural lightweight design of the front side rail of a passenger car. The response surface method is used to create mathematical models that represent the relationship between structural sheet thicknesses and absorbed energy of the entire structure in the frontal crash simulation, and the relationship between structural sheet thicknesses and the mass of the entire structure. Then an optimization process is performed, and the structural mass and original absorbed energy are defined as objective and constraint functions, respectively. Minimum mass and structural sheet thicknesses are obtained with the satisfaction of original absorbed energy of the front side rail structure. The weight reduction of the front side rail is 26.95%.

<>

## Figures

Figure 1

Comparison of deformed shape of full vehicle: t=0ms, t=30ms, t=60ms, and t=90ms

Figure 2

Acceleration of a key point in A-pillar

Figure 3

Deformed shape of the front side rail

Figure 4

Front side rail structure: (a) original structure (thickness 1.5mm) and (b) modified structure

Figure 5

Figure 6

Deformed shape of the front side rail: (a) original structure and (b) lightweight structure

Figure 7

Absorbed energy of front side rail

Figure 8

Absorbed energy of full vehicle

Figure 9

Force response of full vehicle

Figure 10

Acceleration of a key point in A-pillar

## Discussions

Some tools below are only available to our subscribers or users with an online account.

### Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related Proceedings Articles
Related eBook Content
Topic Collections