Design of thin wall structures for energy absorption applications: Enhancement of crashworthiness due to axial and oblique impact forces |
| |
Affiliation: | 1. Mechanics and Material Science Research Center, Ningbo University, Ningbo, Zhejiang Province 315211, PR China;2. Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, PR China |
| |
Abstract: | This paper describes a computationally aided design process of a thin wall structure subject to dynamic compression in both axial and oblique directions. Several different cross sectional shapes of thin walled structures subjected to direct and oblique loads were compared initially to obtain the cross section that fulfills the performance criteria. The selection was based on multi-criteria decision making (MCDM) process. The performance parameters used are the absorbed crash energy, crush force efficiency, ease of manufacture and cost. Once the cross section was selected, the design was further enhanced for better crash performances by investigating the effect of foam filling, increasing the wall thickness and by introducing a trigger mechanism. The outcome of the design process was very encouraging as the new design was able to improve the crash performance by an average of 10%. |
| |
Keywords: | Crashworthiness Energy absorption Oblique impact Axial impact |
本文献已被 ScienceDirect 等数据库收录! |
|