Shape and geometry design for self-locked energy absorption systems

Yang, Kuijian; Chen, Yuli; Zhang, Lei; Xiong, Fen; Hu, Xiang; Qiao, Chuan

doi:10.1016/j.ijmecsci.2019.04.006

Cited by 35 publications

(7 citation statements)

References 26 publications

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“…Hedayati et al [21] conducted analytical, numerical and experimental studies to investigate the elastic modulus and yield strength of PLA meta-materials based on the diamond-and cube-shaped unit cells with variable cross sections fabricated by FDM technology. Yang et al [22] improved energy absorption properties of self-locked systems by designing the shape and geometry of tubes made of 3D printed soft-photopolymer resin and hard materials like stainless steel. Alomarah et al [23] investigated compressive properties of polyamide12 auxetic structures 3D printed by Multi Jet Fusion (MJF) method.…”

Section: Introductionmentioning

confidence: 99%

Reversible energy absorbing meta-sandwiches by FDM 4D printing

Bodaghi

Serjouei

Zolfagharian

et al. 2020

International Journal of Mechanical Sciences

190

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The aim of this paper is to introduce dual-material auxetic meta-sandwiches by four-dimensional (4D) printing technology for reversible energy absorption applications. The meta-sandwiches are developed based on an understanding of hyper-elastic feature of soft polymers and elasto-plastic behaviors of shape memory polymers and cold programming derived from theory and experiments. Dual-material lattice-based meta-structures with different combinations of soft and hard components are fabricated by 4D printing fused deposition modelling technology. The feasibility and performance of reversible dual-material meta-structures are assessed experimentally and numerically. Computational models for the meta-structures are developed and verified by the experiments. Research trials show that the dual-material auxetic designs are capable of generating a range of non-linear stiffness as per the requirement of energy absorbing applications. It is found that the meta-structures with hyper-elastic and/or elasto-plastic features dissipate energy and exhibit mechanical hysteresis characterized by non-coincident compressive loading-unloading curves. Mechanical hysteresis can be achieved by leveraging elasto-plasticity and snap-through-like mechanical instability through compression. Experiments also reveal that the mechanically induced plastic deformation and dissipation processes are fully reversible by simply heating. The material-structural model, concepts and results provided in this paper are expected to be instrumental towards 4D printing tunable meta-sandwiches for reversible energy absorption applications.

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Section: Introductionmentioning

confidence: 99%

Reversible energy absorbing meta-sandwiches by FDM 4D printing

Bodaghi

Serjouei

Zolfagharian

et al. 2020

International Journal of Mechanical Sciences

190

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“…Furthermore, Reid and Reddy proposed a hinge line theory, where the localized hinges were replaced by an arc exhibiting an adjustable length upon compression, and demonstrated its strong agreement with the experimental results [29]. [26].…”

Section: Introductionmentioning

confidence: 59%

“…However, the conventional round-tube systems self-locked energy-absorbing system in which tubes can interlock with each other and no constraints are needed on the boundary or between the tubes [24,25]. They also proved that the ellipse-shaped self-locked tube is an optimal design when compared with other conventional self-locked tubes [26]. The ellipse-shaped self-locked tube not only overcomes the splashing of the tubes, as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

“…The ellipse-shaped self-locked tube not only overcomes the splashing of the tubes, as shown in Fig. 1, but also significantly improves the energy absorption properties because it exhibits an improved collapse stroke as well as energy dissipation potential per unit mass or volume upon lateral compression, resulting in excellent energy absorption efficiency [11,26]. However, the ellipse-shaped self-locked tubes have never been theoretically…”

Section: Introductionmentioning

confidence: 99%

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Theoretical investigation on the energy absorption of ellipse-shaped self-locked tubes

Yang

Qiao

Xiong

et al. 2020

Sci. China Phys. Mech. Astron.

Self Cite

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Self-locked energy-absorbing systems have been proposed in previous studies to overcome the limitations associated with the round-tube systems because they can prevent the lateral splash of tubes from impact loadings without any constraints. In case of self-locked systems, the ellipse-shaped self-locked tube is considered to be an optimal design when compared with the ordinary circle-shaped self-locked tubes and other shaped self-locked tubes. In this study, we aim to theoretically analyze the ellipse-shaped self-locked tubes. Further, a plastic hinge model is developed to predict the force-displacement relation of the tube, which is compared with the deformation process observed in the experiment and finite element method (FEM) simulation.Using this model, the effects of tuning the geometric parameters of the tube on the energy absorption performance, including the deformation efficiency, energy absorption capacity, and effective stroke ratio, are simulated and analyzed. Finally, a

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“…Al-Saedi et al [28] carried out quasi-static uniaxial compression loading to study the mechanical properties and energy absorption behavior of functionally graded cellular structures made of Al-12Si aluminium alloy and fabricated using SLM technology. Yang et al [29] proposed some novel self-locking energy absorber models with various shapes fabricated with hard materials like stainless steel and soft photopolymer resin to improve the performance of self-locked structures. Alomarah et al [30] experimentally and numerically investigated the compressive behavior of re-entrant chiral auxetic structure (RCA) and compared it with three common mechanical lattice structures (tetrachiral, anti-tetrachiral, and re-entrant) made of polyamide12 and produced by the Multi Jet Fusion process.…”

Section: Introductionmentioning

confidence: 99%

Reversible energy absorption of elasto-plastic auxetic, hexagonal, and AuxHex structures fabricated by FDM 4D printing

Namvar

Zolfagharian

Vakili‐Tahami

et al. 2022

Smart Mater. Struct.

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The present study aims at introducing reconfigurable mechanical metamaterials by utilising four-dimensional (4D) printing process for recoverable energy dissipation and absorption applications with shape memory effects. The architected mechanical metamaterials are designed as a repeating arrangement of re-entrant auxetic, hexagonal, and AuxHex unit-cells and manufactured using 3D printing fused deposition modelling process. The AuxHex cellular structure is composed of auxetic re-entrant and hexagonal components. Architected cellular metamaterials are developed based on a comprehension of the elasto-plastic features of shape memory polylactic acid materials and cold programming deduced from theory and experiments. Computational models based on ABAQUS/Standard are used to simulate the mechanical properties of the 4D-printed mechanical metamaterials under quasi-static uniaxial compression loading, and the results are validated by experimental data. Research trials show that metamaterial with re-entrant auxetic unit-cells has better energy absorption capability compared to the other structures studied in this paper, mainly because of the unique deformation mechanisms of unit-cells. It is shown that mechanical metamaterials with elasto-plastic behaviors exhibit mechanical hysteresis and energy dissipation when undergoing a loading-unloading cycle. It is experimentally revealed that the residual plastic strain and dissipation processes induced by cold programming are completely reversible through simple heating. The results and concepts presented in this work can potentially be useful towards 4D printing reconfigurable cellular structures for reversible energy absorption and dissipation engineering applications.

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Shape and geometry design for self-locked energy absorption systems

Cited by 35 publications

References 26 publications

Reversible energy absorbing meta-sandwiches by FDM 4D printing

Reversible energy absorbing meta-sandwiches by FDM 4D printing

Theoretical investigation on the energy absorption of ellipse-shaped self-locked tubes

Reversible energy absorption of elasto-plastic auxetic, hexagonal, and AuxHex structures fabricated by FDM 4D printing

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