A periodic dissipative system with self-locking capacity

Chen, Zongbing; Wu, Qianqian; Yang, Haotian; Yang, Lihong; Xiong, Jian

doi:10.1016/j.ijimpeng.2022.104233

Cited by 16 publications

(2 citation statements)

References 48 publications

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“…Complex and time-consuming additional constraints such as welding and bolt connection are needed to avoid lateral spatter [12].In order to improve the energy absorption performance and simplify the process, Chen [13] proposed a self-locking structure composed of dumbbell shaped thin-walled pipes, which can avoid the lateral splash of pipe fittings without any external constraints.On the basis of this study, Pan [14] filled the dumbbell tube with composite materials to further improve the energy absorption characteristics. However, this structure can only achieve self-locking effect in a single load direction [15][16][17]. Zhao [18] proposed a bidirectional self-locking energy absorption structure with variable cross-section, which uses two different grooves to achieve the self-locking effect between pipe fittings.…”

Section: Introductionmentioning

confidence: 99%

Research on energy absorption characteristics of biconical snap-fit spatial self-locking thin-walled structure

Li,

Zhao,

Yang

et al. 2024

J Braz. Soc. Mech. Sci. Eng.

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Transportation, intelligent equipment and other fields have increasingly high requirements for the performance of energy absorbing structures, especially in the field of emergency protection. It is of great significance to study the self-locking characteristics and energy absorbing effect of new structures. Based on the excellent arc principle of women wearing hair hoops and the self-locking characteristics of mortise and tenon structure, this paper proposes a double arc clip type space self-locking thin-walled structure, which has the advantages of editable, easy to install quickly, and space all-round self-locking. The results of quasi-static compression test on a single thin-walled pipe are compared with those of finite element simulation. The overall error is controlled within 10%, and the results of the experiment and simulation are relatively consistent, which proves the feasibility of the follow-up study of the overall structure. The spatial self-locking ability and energy absorption characteristics of the structure under uniform impact load are verified by finite element method. The effects of geometric parameters and different impact velocities on the energy absorption characteristics of the structure are studied. The results show that: the double arc clip type space self-locking thin-walled structure can withstand the uniform impact load in all directions of the space, and the self-locking characteristics and energy absorption effect are the best when the impact direction is α=0 °, β=0 °; Without affecting the chord distance, the smaller the opening angle of the arc, the better the self-locking performance of the structure and the stronger the energy absorption effect.

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Section: Introductionmentioning

confidence: 99%

Research on energy absorption characteristics of biconical snap-fit spatial self-locking thin-walled structure

Li,

Zhao,

Yang

et al. 2024

J Braz. Soc. Mech. Sci. Eng.

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“…However, extra constraints are commonly required to connect the modules, which will result in extra costs in time and labor to impair the modifiability. To remove these constraints, a series of discretely assembled self-locked devices have been proposed [38][39][40][41][42][43], in which the components are specially designed to interlock with each other. Thus, modifiability to respond to emergencies can be obtained after disassembling and reconfiguring.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design and Mean Stress Estimation of Modular Metamaterials Inspired by Burr Puzzles

Yang,

Li,

et al. 2023

Sustainability

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Modular impact-resistant metamaterials inspired by burr puzzles were recently proposed to combine flexibility, efficiency and adaptivity, which were also beneficial for sustainability in engineering protection. However, the optimal design remains to be explored and the mean stress cannot be effectively estimated. To break these limits, a stiffness-enhanced strategy is implemented to enhance the crashworthiness, and the relation between the mechanical behavior of metamaterials and locking points is revealed. The average thickness of all modules in the metamaterial is denoted by tave, and the thickness ratio of axially loaded to laterally loaded modules is denoted by y. From the experimental and simulation results, the mean stress of the metamaterials significantly increases with tave and y, while the deformation mode is gradually transformed into an inefficient global buckling mode and impairs the crashworthiness when ψ≥4. ψ=3 can be taken as the optimal design of metamaterials, which can increase the specific energy absorption SEA, energy absorption efficiency h and mean stress sm, respectively, by 62.4%, 44.2% and 57.6% compared to the regular design (ψ=1). On this basis, we develop a universe method to estimate the mean stress of the metamaterials with a relative error less than 9.6%, and a guideline for their design and application in engineering fields is summarized. This research opens a new avenue for broadening the design and applications of modular metamaterials in engineering applications.

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Mechanical and failure characteristics of novel tailorable architected metamaterials against crash impact

Yang,

Li,

Huang

et al. 2024

Engineering Failure Analysis

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A periodic dissipative system with self-locking capacity

Cited by 16 publications

References 48 publications

Research on energy absorption characteristics of biconical snap-fit spatial self-locking thin-walled structure

Research on energy absorption characteristics of biconical snap-fit spatial self-locking thin-walled structure

Optimal Design and Mean Stress Estimation of Modular Metamaterials Inspired by Burr Puzzles

Mechanical and failure characteristics of novel tailorable architected metamaterials against crash impact

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