Theoretical, experimental and numerical investigations on the energy absorption of splitting multiple circular tubes under impact loading

Guan, Weiyuan; Gao, Guangjun; Yu, Yiqiang; Zhuo, Tianyu

doi:10.1016/j.tws.2020.106916

Cited by 19 publications

(3 citation statements)

References 40 publications

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“…Thin-walled structures are widely used as energy absorbers in the automotive, rail transport, and aerospace industries due to their superior impact resistance [1][2][3]. The deformation mechanism of these structures can be classified as progressive buckling, depending on the geometry, type of load, and boundary conditions [4], tube inversion [5,6], shrinkage [7], expansion [8], or splitting [9,10]. They are utilized in many engineering structures to dissipate the kinetic energy of impact during collisions.…”

Section: Introductionmentioning

confidence: 99%

Crashworthiness Design and Multi-Objective Optimization of Bionic Thin-Walled Hybrid Tube Structures

Li,

Xiao

2024

CMES

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Thin-walled structures are widely used in cars due to their lightweight construction and energy-absorbing properties. However, issues such as high initial stress and low energy-absorbing efficiency arise. This study proposes a novel energy-absorbing structure in which a straight tube is combined with a conical tube and a bamboo-inspired bulkhead structure is introduced. This configuration allows the conical tube to flip outward first and then fold together with the straight tube. This deformation mode absorbs more energy and less peak force than the conical tube sinking and flipping inward. Through finite element numerical simulation, the specific energy absorption capacity of the structure is increased by 26% compared to that of a regular circular cross-section tube. Finally, the impact resistance of the bionic straight tapered tube structure is further improved through multi-objective optimization, promoting the engineering application and lightweight design of hybrid cross-section tubes.

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Section: Introductionmentioning

confidence: 99%

Crashworthiness Design and Multi-Objective Optimization of Bionic Thin-Walled Hybrid Tube Structures

Li,

Xiao

2024

CMES

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“…UHP devices can be divided into two categories, according to the reasons for pressure generation. The first category is dynamic UHP, which can reach several thousand GPa, but the pressure duration is only microseconds [3,4]. Thus, under the conditions of existing technological capabilities, the application range and scientific research value of dynamic UHP devices are severely limited [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

An Optimized Design Method and Experimental Study of Belt-Type Ultra-High-Pressure Dies

Shi,

Wang,

2023

Metals

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In this study, various structures are designed to improve the bearing capacity of belt-type ultra-high-pressure dies. Via theoretical analysis, numerical simulation, and destructive experiments, the stress distribution, bearing capacity, and failure principle of various dies are analyzed. The results demonstrate that the positive and negative values of the third invariant of the deviatoric stress tensor J3′ determine the deformation mode of the cylinder; when J3′ > 0, the cylinder is in the tensile deformation state, and when J3′ < 0, the cylinder is in the compressive deformation state. The third invariant of the deviatoric stress tensor of the belt-type cylinder is J3′ > 0, which causes tensile failure and rupture due to excessive circumferential stress. The use of a split cylinder can significantly reduce the circumferential stress, thus effectively reducing the maximum shear stress and von Mises stress and improving the pressure capacity of the cavity. However, when J3′ > 0 for the split cylinder, the pressure capacity is affected and the cylinder experiences tensile failure. A tangential split cylinder has a compressive deformation of J3′ < 0, which can fully utilize the properties of hard alloy materials and significantly improve the pressure-bearing capacity of the cylinder. This article provides an effective optimization design theory for belt-type dies, and the effectiveness of this method is proven through experiments.

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“…These structures were mainly made by metal thin-walled profiles like aluminum, [7][8][9] copper, 10 and steel. 11 With the further development of composite industries and the need for structures with lower weight, car manufacturers and researchers tried to manufacture many of the parts from composite structures 12,13 and thus reduce fuel consumption as much as possible by reducing weight. In a research conducted by Xia et al 14 on sandwich panels with triangular cells, the force curve of these panels was extracted analytically.…”

Section: Review Of Literature and Introductionmentioning

confidence: 99%

Investigating hole effects on bending performance of aluminum beams with square cross-sections under three-point bending load and their implementation in light vehicles

Shen¹,

Zahra²

2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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The bending behavior of beams with a square cross-section containing holes under a three-point bending load was investigated in the present study. As aluminum alloys are lighter than steel and there are many automobile companies that use this material, 6063 aluminum alloy was chosen for this study. The present research was carried out both experimentally and numerically. In the numerical section, aluminum beams were simulated with the finite element software LS-DYNA. These beams contained holes with a diameter of 21 mm, which were placed at different distances on the length of the beam. In this research, 36 perforated beams were simulated in three thicknesses: 1, 1.5, and 2, and the holes were placed at 0, 3.5, 7, 10.5, 14, 17.5, 21, 24.5, 28, 35, 42, and 49 mm in relation to the middle of the beam. In addition, a beam without holes was studied for each thickness. Numerical simulations were validated with experiments and good results were observed. The obtained results showed that as the hole moves from the center to the sides, the absorption of energy and maximum force increases. In the final section, the most optimal beams were determined in terms of thickness and hole location, and based on these a car bumper was proposed.

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Theoretical, experimental and numerical investigations on the energy absorption of splitting multiple circular tubes under impact loading

Cited by 19 publications

References 40 publications

Crashworthiness Design and Multi-Objective Optimization of Bionic Thin-Walled Hybrid Tube Structures

Crashworthiness Design and Multi-Objective Optimization of Bionic Thin-Walled Hybrid Tube Structures

An Optimized Design Method and Experimental Study of Belt-Type Ultra-High-Pressure Dies

Investigating hole effects on bending performance of aluminum beams with square cross-sections under three-point bending load and their implementation in light vehicles

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