Progressive collapse of foam-filled conical frustum using kinematically admissible mechanism

Meguid, S. A.; Yang, Fan; Verberne, P.

doi:10.1016/j.ijimpeng.2014.11.013

Cited by 18 publications

(2 citation statements)

References 35 publications

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“…Compression experiments of thin-walled CFRP structures have shown that these structural elements are excellent lightweight absorbers. Foam filled thin-walled structures also play an important role in the field of energy absorption due to the mechanical properties of the foam and the interaction between the foam and the confining shell [22][23][24]. Finite Elements have also been used to compare the mechanical characteristics and energy absorption efficiency of empty and foam filled tubes, with a general satisfactory agreement observed between simulations and experimental results [25][26][27].…”

Section: Introductionmentioning

confidence: 91%

Multi-cell energy-absorbing structures with hollow columns inspired by the beetle elytra

Hao

Liu

et al. 2020

J Mater Sci

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In this work we propose a new type of thin-walled energy absorbed structure with hollow columns that possesses a design inspired by the beetle elytra. The failure mode of the bionic thin-walled structures is firstly discussed by developing a theoretical model. The energy absorption properties of these bio-inspired multi-call thin-walled structures have been then investigated using nonlinear finite element simulations. The values of the specific energy absorption and the crushing force effectiveness have been evaluated for different structures with parametrized column nested configurations. Dynamic impact simulations of multi-cell tubes with different columns nested modes, wall thickness and impact angles have been performed and the results discussed.

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Section: Introductionmentioning

confidence: 91%

Multi-cell energy-absorbing structures with hollow columns inspired by the beetle elytra

Hao

Liu

et al. 2020

J Mater Sci

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“…For the axial loading condition, previous studies showed that the energy dissipation due to friction was negligible. 38,39 However, for the oblique loading condition, the friction effect could not be ignored. Therefore, unless specified otherwise, the static-kinetic friction formulation with a static coefficient of 0.3, kinetic coefficient of 0.15, and an exponential decay coefficient of 1 was applied for all contact interactions.…”

Section: Fe Modelmentioning

confidence: 99%

Energy absorption of thin-walled circular tubes with gradient thickness under oblique loads

Wang

Zhang

Yang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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Introducing nonuniform thickness has shown promising potential in enhancing the energy absorption of thin-walled tubes. However, existing studies were focused on the axial loading, with little attention being paid to the oblique loading condition. In this paper, the energy absorption performance and the deformation modes of the circular tubes with gradient thicknesses under oblique loads are investigated. Finite element simulations and experiments were carried out for both uniform-thick and gradient-thick tubes under the axial and oblique loads, and satisfactory agreement was achieved betweent the numerical and the experimental results. The validated finite element models were used to investigate the effects of the thickness gradient and loading angle on the deforamtion modes and the energy absorption. The results highlight the advantages of the gradient-thickness tubes in improving the energy absorption performance under the oblique loading condition, especially at a larger loading angle. A novel progressive bending deformation mode was observed for the tube with large thickness gradient at a loading angle larger than 15°, which is beneficial for the energy absorption performance.

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Crush behaviour of foam-filled thin-walled conical frusta: analytical, numerical and experimental studies

2016

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Progressive collapse of foam-filled conical frustum using kinematically admissible mechanism

Cited by 18 publications

References 35 publications

Multi-cell energy-absorbing structures with hollow columns inspired by the beetle elytra

Multi-cell energy-absorbing structures with hollow columns inspired by the beetle elytra

Energy absorption of thin-walled circular tubes with gradient thickness under oblique loads

Crush behaviour of foam-filled thin-walled conical frusta: analytical, numerical and experimental studies

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