Mechanical design and energy absorption performances of novel dual scale hybrid plate-lattice mechanical metamaterials

Abstract In this paper, we study the energy absorption of metamaterials composed of unit cells whose special geometry makes the cross-sectional area and the volume of the bodies generated from them constant (for the same enclosing box dimensions). After a parametric description of such special geometries, we analyzed by finite element analysis the deformation of the metamaterials we have designed during compression. We 3D printed the designed metamaterials from plastic to subject them to real compression. The results of the finite element analysis were compared with the real compaction results. Then, for each test specimen, we plotted its compaction curve. By fitting a polynomial to the compaction curves and integrating it (area under the curve), the energy absorption of the samples can be obtained. As a result of these investigations, we drew a conclusion about the relationship between energy absorption and cell number.

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Mechanical design and energy absorption performances of rational gradient lattice metamaterials

Composite Structures ◽

10.1016/j.compstruct.2021.114606 ◽

2021 ◽

pp. 114606

Author(s):

Peng Zhang ◽

Dexing Qi ◽

Rui Xue ◽

Kai Liu ◽

Wenwang Wu ◽

...

Keyword(s):

Energy Absorption ◽

Mechanical Design

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Mechanical design and energy absorption of 3D novel hybrid lattice metamaterials

Science China Technological Sciences ◽

10.1007/s11431-020-1756-x ◽

2021 ◽

Author(s):

Peng Zhang ◽

Biligetu ◽

DeXing Qi ◽

Rui Xue ◽

Kai Liu ◽

...

Keyword(s):

Energy Absorption ◽

Mechanical Design

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Mechanical Properties and Energy Absorption Characteristics of Additively Manufactured Lightweight Novel Re-Entrant Plate-Based Lattice Structures

Polymers ◽

10.3390/polym13223882 ◽

2021 ◽

Vol 13 (22) ◽

pp. 3882

Author(s):

Sultan Al Hassanieh ◽

Ahmed Alhantoobi ◽

Kamran A. Khan ◽

Muhammad A. Khan

Keyword(s):

Mechanical Properties ◽

Energy Absorption ◽

Power Law ◽

Elastic Anisotropy ◽

Lattice Structures ◽

Numerical Homogenization ◽

Anisotropic Behavior ◽

Cubic Symmetry ◽

Compressive Response ◽

Hybrid Plate

In this work, three novel re-entrant plate lattice structures (LSs) have been designed by transforming conventional truss-based lattices into hybrid-plate based lattices, namely, flat-plate modified auxetic (FPMA), vintile (FPV), and tesseract (FPT). Additive manufacturing based on stereolithography (SLA) technology was utilized to fabricate the tensile, compressive, and LS specimens with different relative densities (ρ). The base material’s mechanical properties obtained through mechanical testing were used in a finite element-based numerical homogenization analysis to study the elastic anisotropy of the LSs. Both the FPV and FPMA showed anisotropic behavior; however, the FPT showed cubic symmetry. The universal anisotropic index was found highest for FPV and lowest for FPMA, and it followed the power-law dependence of ρ. The quasi-static compressive response of the LSs was investigated. The Gibson–Ashby power law (≈ρn) analysis revealed that the FPMA’s Young’s modulus was the highest with a mixed bending–stretching behavior (≈ρ1.30), the FPV showed a bending-dominated behavior (≈ρ3.59), and the FPT showed a stretching-dominated behavior (≈ρ1.15). Excellent mechanical properties along with superior energy absorption capabilities were observed, with the FPT showing a specific energy absorption of 4.5 J/g, surpassing most reported lattices while having a far lower density.

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Brief review of metamaterials and auxetic materials

University of Pitesti Scientific Bulletin - Automotive Series ◽

10.26825/bup.ar.2021.003 ◽

2021 ◽

Vol 31 ◽

pp. 1-9

Author(s):

Raluca Florentina NEGREA ◽

Keyword(s):

Energy Absorption ◽

Mechanical Response ◽

Deformation Pattern ◽

Geometrical Shape ◽

Variable Permeability ◽

Base Materials ◽

Mechanical Metamaterials ◽

Auxetic Materials ◽

Potential Applications ◽

Absorption Performance

This paper aims to provide a comprehensive review on auxetic materials and structures, including various types of cellular auxetics, natural and artificial auxetics, metallic auxetics, multi-material and composite auxetics. A material engineered to have aproperty that is not found in naturally occurring materials is the metamaterial (meaning"beyond" from the Greek word μετά meta, and "material" from the Latin word materia) made from assemblies of multiple elements shaped from composite materials such as metals and plastics. They have exceptional properties, derive from their geometrical shape rather than directly from the behavior of the base materials, in terms of mechanical response, energy absorption and, heat transport performance.One of the most studied species of mechanical metamaterials is the auxetic materials, a type of mechanical metamaterial with a negative Poisson’s ratio (which shrink transversely under longitudinal compression and expand transversely under longitudinal tension). They consistof numerous hinge-like cells that are joined together. The cells have a re-entrant geometry, i.e. under pressure, they expand in lateral direction.Superior and unusual properties of auxetics are presented and some existing or potential applications are summarized. Accompanied by uncommon deformation pattern under compression and tension, auxetic materials and structures are endowed with many desirable material properties, such as superior shear resistance, indentation resistance, fracture resistance, synclastic behavior, variable permeability and better energy absorption performance.

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Design of buckling-induced mechanical metamaterials for energy absorption using topology optimization

Structural and Multidisciplinary Optimization ◽

10.1007/s00158-018-1970-y ◽

2018 ◽

Vol 58 (4) ◽

pp. 1395-1410 ◽

Cited By ~ 21

Author(s):

Qi Chen ◽

Xianmin Zhang ◽

Benliang Zhu

Keyword(s):

Topology Optimization ◽

Energy Absorption ◽

Mechanical Metamaterials

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A Novel Design Method for Energy Absorption Property of Chiral Mechanical Metamaterials

Materials ◽

10.3390/ma14185386 ◽

2021 ◽

Vol 14 (18) ◽

pp. 5386

Author(s):

Mengli Ye ◽

Liang Gao ◽

Fuyu Wang ◽

Hao Li

Keyword(s):

Energy Absorption ◽

Large Deviation ◽

Design Method ◽

Structural Parameters ◽

Impact Resistance ◽

Absorption Properties ◽

Impact Compression ◽

Mechanical Metamaterials ◽

Good Energy ◽

Bragg Grating Sensor

In this paper, a full-cycle interactive progressive (FIP) method that integrates topology optimization, parametric optimization, and experimental analysis to determine the optimal energy absorption properties in the design of chiral mechanical metamaterials is proposed. The FIP method has improved ability and efficiency compared with traditional design methods due to strengthening the overall design, introducing surrogate models, and its consideration of the application conditions. Here, the FIP design was applied in the design of mechanical metamaterials with optimized energy absorption properties, and a chiral mechanical metamaterial with good energy absorption and impact resistance was obtained based on the rotation mechanism of metamaterials with a negative Poisson’s ratio. The relationship among the size parameters, applied boundary conditions, and energy absorption properties were studied. An impact compression experiment using a self-made Fiber Bragg Grating sensor was carried out on the chiral mechanical metamaterial. In light of the large deviation of the experimental and simulation data, a feedback adjustment was carried out by adjusting the structural parameters to further improve the mechanical properties of the chiral mechanical metamaterial. Finally, human–computer interaction, self-innovation, and a breakthrough in the design limits of the optimized model were achieved. The results illustrate the effectiveness of the FIP design method in improving the energy absorption properties in the design of chiral mechanical metamaterials.

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Mechanical design of the highly porous cuttlebone: A bioceramic hard buoyancy tank for cuttlefish

Proceedings of the National Academy of Sciences ◽

10.1073/pnas.2009531117 ◽

2020 ◽

Vol 117 (38) ◽

pp. 23450-23459

Author(s):

Ting Yang ◽

Zian Jia ◽

Hongshun Chen ◽

Zhifei Deng ◽

Wenkun Liu ◽

...

Keyword(s):

Energy Absorption ◽

Mechanical Performance ◽

Mechanical Design ◽

Water Pressure ◽

Three Dimensional ◽

High Energy ◽

Image Correlation ◽

Design Strategies ◽

Stress Concentrations ◽

Damage Tolerant

Cuttlefish, a unique group of marine mollusks, produces an internal biomineralized shell, known as cuttlebone, which is an ultra-lightweight cellular structure (porosity, ∼93 vol%) used as the animal’s hard buoyancy tank. Although cuttlebone is primarily composed of a brittle mineral, aragonite, the structure is highly damage tolerant and can withstand water pressure of about 20 atmospheres (atm) for the speciesSepia officinalis. Currently, our knowledge on the structural origins for cuttlebone’s remarkable mechanical performance is limited. Combining quantitative three-dimensional (3D) structural characterization, four-dimensional (4D) mechanical analysis, digital image correlation, and parametric simulations, here we reveal that the characteristic chambered “wall–septa” microstructure of cuttlebone, drastically distinct from other natural or engineering cellular solids, allows for simultaneous high specific stiffness (8.4 MN⋅m/kg) and energy absorption (4.4 kJ/kg) upon loading. We demonstrate that the vertical walls in the chambered cuttlebone microstructure have evolved an optimal waviness gradient, which leads to compression-dominant deformation and asymmetric wall fracture, accomplishing both high stiffness and high energy absorption. Moreover, the distribution of walls is found to reduce stress concentrations within the horizontal septa, facilitating a larger chamber crushing stress and a more significant densification. The design strategies revealed here can provide important lessons for the development of low-density, stiff, and damage-tolerant cellular ceramics.

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