In-plane energy absorption characteristics of a modified re-entrant auxetic structure fabricated via 3D printing

Choudhry, Niranjan Kumar; Panda, Biranchi; Kumar, Sandeep

doi:10.1016/j.compositesb.2021.109437

Cited by 143 publications

(26 citation statements)

References 50 publications

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“…Reproduced with permission. [ 259 ] Copyright 2022, Elsevier Ltd. l–n) Samples of foam‐filled honeycomb, and the stress–strain curves of slow‐recovery foam filled with different cell wall thicknesses and cell angles re‐entering the honeycomb. Reproduced with permission.…”

Section: Honeycomb Architecturementioning

confidence: 99%

“…Copyright 2020, Elsevier Ltd. j,k) Schematic diagram of the modified re-entrant honeycomb structure, and the stress-strain curves for regular re-entrant honeycomb and optimal structure. Reproduced with permission [259]. Copyright 2022, Elsevier Ltd. l-n) Samples of foam-filled honeycomb, and the stress-strain curves of slow-recovery foam filled with different cell wall thicknesses and cell angles re-entering the honeycomb.…”

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confidence: 99%

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Advanced Composites Inspired by Biological Structures and Functions in Nature: Architecture Design, Strengthening Mechanisms, and Mechanical‐Functional Responses

Dai

et al. 2023

Advanced Science

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The natural design and coupling of biological structures are the root of realizing the high strength, toughness, and unique functional properties of biomaterials. Advanced architecture design is applied to many materials, including metal materials, inorganic nonmetallic materials, polymer materials, and so on. To improve the performance of advanced materials, the designed architecture can be enhanced by bionics of biological structure, optimization of structural parameters, and coupling of multiple types of structures. Herein, the progress of structural materials is reviewed, the strengthening mechanisms of different types of structures are highlighted, and the impact of architecture design on the performance of advanced materials is discussed. Architecture design can improve the properties of materials at the micro level, such as mechanical, electrical, and thermal conductivity. The synergistic effect of structure makes traditional materials move toward advanced functional materials, thus enriching the macroproperties of materials. Finally, the challenges and opportunities of structural innovation of advanced materials in improving material properties are discussed.

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Section: Honeycomb Architecturementioning

confidence: 99%

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confidence: 99%

Advanced Composites Inspired by Biological Structures and Functions in Nature: Architecture Design, Strengthening Mechanisms, and Mechanical‐Functional Responses

Dai

et al. 2023

Advanced Science

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“…The interaction of geometric parameters such as the ratio of base length and connection angle on the hardness, strength, and energy absorption properties of re‐entrant auxetic honeycombs as a common type of auxetic structures was evaluated. [ 23–25 ]…”

Section: Introductionmentioning

confidence: 99%

3D‐Printed Soft and Hard Meta‐Structures with Supreme Energy Absorption and Dissipation Capacities in Cyclic Loading Conditions

et al. 2022

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The main objective of this article is to introduce novel 3D bio‐inspired auxetic meta‐structures printed with soft/hard polymers for energy absorption/dissipation applications under single and cyclic loading–unloading. Meta‐structures are developed based on understanding the hyper‐elastic feature of thermoplastic polyurethane (TPU) polymers, elastoplastic behavior of polyamide 12 (PA 12), and snowflake inspired design, derived from theory and experiments. The 3D meta‐structures are fabricated by multi‐jet fusion 3D printing technology. The feasibility and mechanical performance of different meta‐structures are assessed experimentally and numerically. Computational finite element models (FEMs) for the meta‐structures are developed and verified by the experiments. Mechanical compression tests on TPU auxetics show unique features like large recoverable deformations, stress softening, mechanical hysteresis characterized by non‐coincident compressive loading–unloading curve, Mullins effect, cyclic stress softening, and high energy absorption/dissipation capacity. Mechanical testing on PA 12 meta‐structures also reveals their elastoplastic behavior with residual strains and high energy absorption/dissipation performance. It is shown that the developed FEMs can replicate the main features observed in the experiments with a high accuracy. The material‐structural model, conceptual design, and results are expected to be instrumental in 3D printing tunable soft and hard meta‐devices with high energy absorption/dissipation features for applications like lightweight drones and unmanned aerial vehicles (UAVs).

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“…Their static/dynamic mechanical properties have also been studied to some extent. Researchers have used theoretical analysis, numerical simulation, and experimental methods to study its equivalent elastic modulus, indentation resistance [ 20 , 21 , 22 , 23 ], and impact resistance [ 18 , 19 ], revealing that the impact resistance of honeycomb structures is affected by the cell shape, t/l (wall thickness/length), Poisson’s ratio, and other factors together [ 24 , 25 ]. In terms of the impact response of the honeycomb sandwich structure, Xie et al [ 26 ] studied the effects of the density of the honeycomb cores, face sheet thickness, punch diameter, and impact energy on the impact loads and failure modes.…”

Section: Introductionmentioning

confidence: 99%

“…Most of the previous studies have been focused on analyzing a single-type honeycomb structure, and there is a lack of comparative analysis of the different mechanical properties of honeycomb structures with a positive/negative/zero Poisson’s ratio [ 20 , 21 , 33 , 34 ]. Luo et al [ 35 ] studied the local impact resistance of honeycomb sandwich structures with different Poisson’s ratios and found that the negative Poisson’s ratio honeycomb had a more substantial impact bearing capacity, while the zero Poisson’s ratio honeycomb had a better damping and energy absorption capacity.…”

Section: Introductionmentioning

confidence: 99%

Impact Response of the Honeycomb Sandwich Structure with Different Poisson’s Ratios

et al. 2022

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The honeycomb sandwich structure is widely used in energy-absorbing facilities because it is lightweight, has a high specific stiffness and high specific strength, and is easy to process. It also has dynamic mechanical characteristics such as a high impact resistance and high energy absorption. To explore the influence of the Poisson’s ratio on the local impact resistance, this paper compares and analyzes the local impact resistance of a series of honeycomb cores with different Poisson’s ratios under the impact of a spherical projectile at different speeds. Three typical honeycombs with negative/zero/positive Poisson ratios (re-entrant hexagon, semi-re-entrant hexagon, and hexagon) are selected to change the geometric parameters in order to have the same relative density and different Poisson ratios (−2.76–3.63). The relative magnitude of the rear face sheet displacement is in the order of negative Poisson’s ratio > zero Poisson’s ratio > positive Poisson’s ratio, which reveals that the honeycomb structure with the positive Poisson’s ratio has better protection ability than the others. Finally, a dual-wall hexagonal honeycomb is proposed. The rear face sheet displacement of the dual-wall hexagonal honeycomb sandwich structure is reduced by 34.4% at 25 m/s compared with the hexagonal honeycomb, which has a better local impact resistance.

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In-plane energy absorption characteristics of a modified re-entrant auxetic structure fabricated via 3D printing

Cited by 143 publications

References 50 publications

Advanced Composites Inspired by Biological Structures and Functions in Nature: Architecture Design, Strengthening Mechanisms, and Mechanical‐Functional Responses

Advanced Composites Inspired by Biological Structures and Functions in Nature: Architecture Design, Strengthening Mechanisms, and Mechanical‐Functional Responses

3D‐Printed Soft and Hard Meta‐Structures with Supreme Energy Absorption and Dissipation Capacities in Cyclic Loading Conditions

Impact Response of the Honeycomb Sandwich Structure with Different Poisson’s Ratios

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