Large deformations of soft metamaterials fabricated by 3D printing

Bodaghi, Mahdi; Damanpack, A.R.; Hu, Gang; Liao, Wei-Hsin

doi:10.1016/j.matdes.2017.06.002

Cited by 102 publications

(53 citation statements)

References 21 publications

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“…Recently, a composite triangular honeycomb structure was designed and manufactured by Compton et al [12] using a 3D printing technology in order to be tested under compression. Furthermore, the ability of shape recovery of the mentioned structure was studied [27], and Bodaghi et al [13] investigated the large deformations of TH structure by taking advantage of 3D printing technology to manufacture the samples. As the application of the TH structure is very common, we applied this pattern to the board to determine its bending resistance.…”

Section: Triangular Honeycomb Structurementioning

confidence: 99%

“…Compton et al [12] fabricated various composite structures and tested them under compression. Among all of these structures, a bio-inspired honeycomb structure, due to its high stiffness per weight ratio, has received much attention [10,[13][14][15]. However, structural complexity has rendered these composites challenging to manufacture.3D printing, or additive manufacturing (AM), refers to producing objects from a 3D model, mostly layer by layer.…”

mentioning

confidence: 99%

“…However, structural complexity has rendered these composites challenging to manufacture.3D printing, or additive manufacturing (AM), refers to producing objects from a 3D model, mostly layer by layer. The main benefits of 3D printing could be listed as design freedom, waste diminution as well as the ability to fabricate complex structures with sufficient geometrical precision [12,13,[16][17][18][19][20]. Recently, studies have been conducted to take advantage of 3D printing in the field of sports.…”

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confidence: 99%

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3D Printing On-Water Sports Boards with Bio-Inspired Core Designs

et al. 2020

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Modeling and analyzing the sports equipment for injury prevention, reduction in cost, and performance enhancement have gained considerable attention in the sports engineering community. In this regard, the structure study of on-water sports board (surfboard, kiteboard, and skimboard) is vital due to its close relation with environmental and human health as well as performance and safety of the board. The aim of this paper is to advance the on-water sports board through various bio-inspired core structure designs such as honeycomb, spiderweb, pinecone, and carbon atom configuration fabricated by three-dimensional (3D) printing technology. Fused deposition modeling was employed to fabricate complex structures from polylactic acid (PLA) materials. A 3D-printed sample board with a uniform honeycomb structure was designed, 3D printed, and tested under three-point bending conditions. A geometrically linear analytical method was developed for the honeycomb core structure using the energy method and considering the equivalent section for honeycombs. A geometrically non-linear finite element method based on the ABAQUS software was also employed to simulate the boards with various core designs. Experiments were conducted to verify the analytical and numerical results. After validation, various patterns were simulated, and it was found that bio-inspired functionally graded honeycomb structure had the best bending performance. Due to the absence of similar designs and results in the literature, this paper is expected to advance the state of the art of on-water sports boards and provide designers with structures that could enhance the performance of sports equipment.

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Section: Triangular Honeycomb Structurementioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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3D Printing On-Water Sports Boards with Bio-Inspired Core Designs

et al. 2020

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“…These structures gain the extraordinary thermo-mechanical properties from their architecture and programmed structures, rather than the bulk behavior of their elements. Meta-materials exhibit interesting features such as zero/negative Poisson's ratio (auxetic behaviors) [2], variable softening/hardening [3], effective thermal properties [4,5], and unusual dynamical behaviors [6,7].…”

Section: Introductionmentioning

confidence: 99%

Reversible energy absorbing meta-sandwiches by FDM 4D printing

Bodaghi

Serjouei

Zolfagharian

et al. 2020

International Journal of Mechanical Sciences

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188

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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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“…The mixture of two proper materials in the production of many composites has widely been used [28][29][30][31][32][33][34][35]. Mixed material has been detected to be effective in the 3D printing by a known approach, such as FDM.…”

Section: Experimental Workmentioning

confidence: 99%

The Synergic Effects of FDM 3D Printing Parameters on Mechanical Behaviors of Bronze Poly Lactic Acid Composites

et al. 2020

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In this paper, the influence of layer thickness (LT), infill percentage (IP), and extruder temperature (ET) on the maximum failure load, thickness, and build time of bronze polylactic acid (Br-PLA) composites 3D printed by the fused deposition modeling (FDM) was investigated via an optimization method. PLA is a thermoplastic aliphatic polyester obtained from renewable sources, such as fermented plant starch, especially made by corn starch. The design of experiment (DOE) approach was used for optimization parameters, and 3D printings were optimized according to the applied statistical analyses to reach the best features. The maximum value of failure load and minimum value of the build time were considered as optimization criteria. Analysis of variance results identified the layer thickness as the main controlled variable for all responses. Optimum solutions were examined by experimental preparation to assess the efficiency of the optimization method. There was a superb compromise among experimental outcomes and predictions of the response surface method, confirming the reliability of predictive models. The optimum setting for fulfilling the first criterion could result in a sample with more than 1021 N maximum failure load. Finally, a comparison of maximum failure from PLA with Br-PLA was studied.

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Large deformations of soft metamaterials fabricated by 3D printing

Cited by 102 publications

References 21 publications

3D Printing On-Water Sports Boards with Bio-Inspired Core Designs

3D Printing On-Water Sports Boards with Bio-Inspired Core Designs

Reversible energy absorbing meta-sandwiches by FDM 4D printing

The Synergic Effects of FDM 3D Printing Parameters on Mechanical Behaviors of Bronze Poly Lactic Acid Composites

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