Energy absorption of discretely assembled composite self-locked systems

Pan, J.; Zhu, Weiyu; Yang, Kuijian; Hu, Lingling; Chen, Yuli

doi:10.1016/j.compstruct.2022.115686

Cited by 21 publications

(1 citation statement)

References 27 publications

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“…In order to further improve the energy absorption characteristics of thin-walled porous tubular structures, scholars at home and abroad have studied the energy absorption effect and deformation capacity of thin-walled tubes with different cross-section shapes such as circular, square, rectangular, conical and polygonal [8][9][10][11].The research shows that the circular tube has the best energy absorption effect and the largest average load among all kinds of pipe fittings [9].However, due to the extremely low friction resistance, the traditional metal thin-walled circular pipe structure is prone to lateral spatter under impact load, which seriously affects the energy absorption efficiency. 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].…”

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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In‐Plane Crashworthiness of Gradient Curved‐Walled Honeycombs: Experimental, Numerical Simulation, and Theoretical Analysis

Yang,

Ke,

et al. 2024

Adv Eng Mater

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Honeycombs are widely used in engineering protection, while the gap between peak and mean stresses remains to be narrowed, and the interaction effects among walls are weak. To break these limits, gradient curved‐walled honeycombs have been proposed recently. However, their in‐plane crashworthiness has never been studied, which restricts the actual applications in complex load environment. For this purpose, this article adopts experiments, finite‐element simulations, and theoretical analysis to reveal in‐plane crash performance of gradient curved‐walled honeycombs. Quasistatic and dynamic experiments are carried out for 3D‐printed honeycomb specimens made of 316L stainless steel, and numerical simulations are conducted by ABAQUS/Explicit. Compared to traditional straight‐ and curved‐walled honeycombs, gradient curved‐walled honeycombs display stabler deformation mode and more efficient mechanical response. Their EA and SEA are respectively 25.5% and 6.4% larger than straight‐walled honeycombs, and their energy absorption and force efficiencies are nearly 2.4 and 5.3 times larger, respectively. On this basis, plastic hinge model with high accuracy has been established, to derive the analytical solutions of their force–displacement relations. This work extends the comprehensive properties and application prospects of gradient curved‐walled honeycombs and sets an example to develop plastic hinge analysis with effective simplification and desirable accuracy on complex‐shaped structures.

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A novel prefabricated auxetic honeycomb meta-structure based on mortise and tenon principle

Zhu,

Gao,

Shao

et al. 2024

Composite Structures

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Energy absorption of discretely assembled composite self-locked systems

Cited by 21 publications

References 27 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

In‐Plane Crashworthiness of Gradient Curved‐Walled Honeycombs: Experimental, Numerical Simulation, and Theoretical Analysis

A novel prefabricated auxetic honeycomb meta-structure based on mortise and tenon principle

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