Enhancement in specific energy absorption of invertubes

被引：8

作者：

Reddy, T. J. ^{[1
]}

Narayanamurthy, V. ^{[2
]}

Rao, Y. V. D. ^{[1
]}

机构：

[1] BITS Pilani, Dept Mech Engn, Hyderabad 500079, India

[2] Res Ctr Imarat, Directorate Syst Integrat, Hyderabad 500069, India

来源：

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES | 2019年 / 159卷

关键词：

Tube inversion; Energy absorption; Multi-materials; Uniform crush force; Composites; Laminates; Fiber-metal laminates; Plastic strain; Crashworthiness; FEA; THIN-WALLED STRUCTURES; CONICAL FRUSTA; LIGHTWEIGHT DESIGN; COMPOSITE; CRASHWORTHINESS; BEHAVIOR; TUBES; MODEL;

D O I：

10.1016/j.ijmecsci.2019.06.016

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Circular tubes having preformed feature which induce inversion type of deformation under axial loading are referred to as invertubes. Invertubes are used as impact energy absorbers due to their peculiar inversive mode of deformation upon axial crash-impact and exhibit less initial peak force with nearly 100% stroke and crush force efficiencies. But restrictions on the combination of invertube's geometric profile and material's ductility significantly limit the specific energy absorption (SEA), a critical crash performance parameter that influences the selection of an energy absorbing (EA) structure. Therefore, this paper proposes invertubes with multi-material structural configurations to achieve higher SEA. Initially, a base monolithic configuration of invertube made of SS304 has been studied numerically and validated by experiment. Subsequently, a few invertube configurations have been proposed over this base configuration by combination of different metals and composites. Relative merits and limitations of each variant (configuration) have been discussed in detail with a specific relevance to enhancement in SEA.

引用

页码：424 / 440

页数：17

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