National Natural Science Foun-dation of China [52005054, 52275235]; Natural Science Foundation of Hunan Province [2021JJ40585, 2023JJ20040]; Scientific Research Fund of Hunan Provincial Education Department [22B0307]; Hunan Science Foundation for Distinguished Young Schol-ars of China [2021JJ10040]; Education Reform Project of Hunan Province [HNJG-2021-0457]
机构署名：
本校为第一且通讯机构
院系归属：
汽车与机械工程学院
摘要：
Double hat-beams (DB) made of high-strength steel are widely used in automobile body for their excellent impact resistance. To further improve the crashworthiness of DB, the concept of hierarchy is first introduced into the design of DBs to obtain the so-called hierarchical double-hat beams (HDBs). The finite element model of DB is validated by impact tests. It is found that the hierarchical structures exhibit better energy absorption characteristics and deformation stability compared with DB. Among them, the mean crushing force (MCF) values of DBT and STT exceed DB 70.63% and 49.47% separatel...
