Crashworthiness analysis of double-corrugated multicellular tubes under axial impact
摘要
A new type of double circular corrugated multicellular tube was proposed, and its crashworthiness was analyzed under the same wall thickness. The results show that compared with a single circular corrugated tube, a double circular corrugated multicellular tube has better crashworthiness. When the number of ripples N = 6, the maximum specific energy absorption (SEA) and crush force efficiency (CFE) are 20.05% and 19.41% higher than those of a single circular corrugated tube, respectively. When N = 8, the highest values of SEA and CFE were 28.95% and 21.11% higher than those of the single circular corrugated tube, respectively. When N = 10, the highest values of SEA and CFE were 25.77% and 13.98% higher than those of the single circular corrugated tube, respectively. A parametric study of the structure shows that the crashworthiness of the double circular corrugated multicellular tube is more affected by A2 than by A1, and the initial peak crush force (IPCF) increases with increasing A1 and A2. The CFE of the double circular corrugated multicellular tube is more affected by t2 than by t1. The CFE decreased with increasing N, and the energy absorption (EA) and IPCF increased with increasing N. The impact of the change in D1 on the crashworthiness of the structure is not very significant, and the SEA and CFE of the structure are best when D1 = 14 mm. Finally, the deformation model diagram of the structure is analyzed and obtained.