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http://dx.doi.org/10.3795/KSME-A.2012.36.11.1335

A Study on the Lightweight Design of Hybrid Modular Carbody Structures Made of Sandwich Composites and Aluminum Extrusions Using Optimum Analysis Method  

Jang, Hyung-Jin (Dept. of Mechanical Design Engineering, Hanbat Nat'l Univ.)
Shin, Kwang-Bok (Dept. of Mechanical Engineering, Hanbat Nat'l Univ.)
Han, Sung-Ho (Korean Railroad Research Institute)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.36, no.11, 2012 , pp. 1335-1343 More about this Journal
Abstract
In this study, the lightweight modular design of hybrid railway carbody structures made of sandwich composites and aluminum extrusions was investigated by using topology and size optimization techniques. The topology optimum design was used to select the best material for parts of the carbody structure at the initial design stage, and then, the size optimum design was used to find the optimal design parameters of hybrid carbody structures using first-order and sub-problem methods. Through the topology optimization analysis, it was found that aluminum extrusions were suitable for primary members such as the underframe and lower side panel module to improve the stiffness and manufacturability of the carbody structures, and sandwich composites were appropriate for secondary members such as the roof and middle side panel module to minimize its weight. Furthermore, the results obtained by size optimization analysis showed that the weight of hybrid carbody structures composed of aluminum extrusions and sandwich composites could be reduced by a maximum of approximately 17.7% in comparison with carbody structures made of only sandwich composites.
Keywords
Sandwich Composite; Aluminum Extrusion; Topology Optimization; Size Optimization; Hybrid Modular Carbody Structure;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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