Abstract
The main load-supporting elements for an automobile framework are thin-walled beams. To study the effectiveness of lightweighting on the body stiffness, the analytical formulae describing static bending and torsional stiffness of a beam with fixed-fixed supporters were derived firstly. To get a light thin-walled beam structure with optimum section, the influence of every sectional geometry parameter on the stiffness-mass ratio was discussed respectively. After replacing the steel by the lightweight material, the corresponding variations in structural stiffness and size were analyzed. The stiffness-mass ratios of beams with open and close loop sections were also compared with each other. Finally, a few geometrical and material parameters, which can greatly influence the bending or torsional stiffness of these thin-walled beams, were found. For a typical thin-walled beam applied in an automobile body, the design guideline achieving both lightweight and high stiffness is presented.
| Original language | English |
|---|---|
| Pages (from-to) | 1163-1167 |
| Number of pages | 5 |
| Journal | Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics |
| Volume | 30 |
| Issue number | 12 |
| State | Published - Dec 2004 |
Keywords
- Automobile body
- Bending stiffness
- Cross section
- Thin-walled structure
- Torsional stiffness
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