期刊
INTERNATIONAL JOURNAL OF CRASHWORTHINESS
卷 24, 期 2, 页码 121-136出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/13588265.2017.1410338
关键词
Multi-cell tubes; crashworthiness; crush force efficiency; energy absorption; thin-walled structures
资金
- Scientific and Technological Research Council of Turkey (TUBITAK) [MAG-115M025]
Crash box design has a substantial importance to reduce the fatalities in a frontal crash. In this study, four different types of multi-cell tubes, namely straight-circular, straight-square, tapered-circular and tapered-square geometries, are considered as energy absorbing components. For each type, seven different cell structures are designed, and the crashworthiness of these designs is assessed based on two different metrics: crush force efficiency (CFE) and specific energy absorption (SEA). When the thickness and the taper angle are fixed, the multi-cell design having the best performance is found to have 165% larger CFE and 237% larger SEA compared to the single-cell design having the worst performance. By varying the thickness, the CFE and SEA performances of the best design can be further increased by 5% and 7%, respectively. Similarly, by varying the taper angle, the SEA performances of the best design with varied thickness can further be increased by 4%. HIGHLIGHTS Impact behaviour of several multi-cell straight and tapered tubes are investigated All multi-cell models have larger CFE and SEA values than the single-cell models Tapered-circular tube has the best, straight-square has the worst crush performance CFE of the best multi-cell design is 177% larger than the worst single-cell design SEA of the best multi-cell design is 275% larger than the worst single-cell design
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