Investigation of combined effects of cross section, taper angle and cell structure on crashworthiness of multi-cell thin-walled tubes. Issue 2 (4th March 2019)

• Record Type: Journal Article
• Authors: Altin, Murat; Kılınçkaya, Ümit; Acar, Erdem; Güler, Mehmet Ali
• Is Part Of: International journal of crashworthiness. Volume 24:Issue 2(2019)
• Page Start: 121
• Page End: 136
• Publication Date: 2019-03-04
• Subjects: Multi-cell tubes -- crashworthiness -- crush force efficiency -- energy absorption -- thin-walled structures; Automobiles -- Crashworthiness -- Periodicals; Airplanes -- Crashworthiness -- Periodicals; 629.2042
• DOI: 10.1080/13588265.2017.1410338
• Languages: English
• ISSNs: 1358-8265

Abstract

ABSTRACT: 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