Investigation on deformation process of cellular structures with gradient topology manufactured additively

Płatek, Paweł; Baranowski, Paweł; Cieplak, Kamil; Sarzyński, Marcin; Sienkiewicz, Judyta; Janiszewski, Jacek; Małachowski, Jerzy

doi:10.1063/1.5092111

Cited by 14 publications

(20 citation statements)

References 23 publications

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“…Structures inspired by natural shapes and patterns like spiderwebs, sunflowers, pine, and carbon crystal lattices were developed. Some of them have recently attracted researchers' attention such as triangular honeycomb (TH) [12,31] and hexagonal-rhombic (HR) [11]. For all of the structures, the mesh convergence study was conducted and the appropriate number of elements for the FEM model was selected.…”

Section: Testing Different Core Patternsmentioning

confidence: 99%

“…The HR structure, which is comprised of intermeshed rows of hexagonal and rhombic patterns periodically repeated across the core of the board, has been recently presented by Platec et al [11] as a cellular structure fabricated by an FDM technology. Having been tested under a quasi-static loading (compression) condition, this structure demonstrated a compression resistance superior to that of a uniform honeycomb.…”

Section: Hexagonal-rhombic Structurementioning

confidence: 99%

“…Recently, various cellular core structures have been introduced for different purposes. Platek et al [11] tested gradient three-dimensional (3D)-printed structures to compare their tensile properties. Compton et al [12] fabricated various composite structures and tested them under compression.…”

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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: Testing Different Core Patternsmentioning

confidence: 99%

Section: Hexagonal-rhombic Structurementioning

confidence: 99%

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

et al. 2020

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“…Considering the possibilities offered by additive manufacturing techniques, the authors decided to use an SLM device and SS316L stainless steel metal powder to produce the lattice structure specimens. Three-dimensional printing is well known and has been characterized in detail in many scientific papers [9,[61][62][63][64][65]. Moreover, its growing importance from year to year can be observed.…”

Section: Lattice Structure Manufacturing Processmentioning

confidence: 99%

“…This paper is a continuation of the authors' works related to additively manufactured lattice structure made from 316L stainless steel. Results associated with this work were partially published in [61][62][63]. On the basis of results of quality control and microstructure studies, certain drawbacks of the SLM technique as a method of fabrication for lattice structures were revealed.…”

Section: Introductionmentioning

confidence: 99%

Investigations on Mechanical Properties of Lattice Structures with Different Values of Relative Density Made from 316L by Selective Laser Melting (SLM)

Płatek¹,

Sienkiewicz²,

Janiszewski³

et al. 2020

Preprint

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Nine variants of regular lattice structures with different relative densities have been designed and successfully manufactured. The produced structures have been subjected to geometrical quality control, and the manufacturability of the implemented selective laser melting SLM technique has been assessed. It was found that the dimensions of the produced lattice struts differ from those of the designed struts. These deviations depend on the direction of geometrical evaluation. Additionally, the microstructures and phase compositions of the obtained structures were characterized and compared with those of conventionally produced 316L stainless steel. The microstructure analysis and X-Ray Diffraction XRD patterns revealed a single austenite phase in the SLM samples. Both a certain broadening and a displacement of the austenite peaks were observed due to residual stresses and a crystallographic texture induced by the SLM process. Furthermore, the mechanical behavior of the lattice structure material has been defined. It was demonstrated that under both quasi-static and dynamic testing, lattice structures with high relative densities are stretch-dominated, whereas those with low relative densities are bending-dominated. Moreover, the linear relationship between the energy absorption and relative density under dynamic loading conditions has been defined

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Response of Chiral Auxetic Composite Sandwich Panel to Fragment Simulating Projectile Impact

Novak

Vesenjak

Kennedy

et al. 2019

Physica Status Solidi (b)

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The chiral auxetic cellular structures are fabricated using SEBM (selective electron beam melting) method and tested under compressive loading. The results of experimental testing are used for validation of the computational model in LS-DYNA. Furthermore, ballistic velocity and deformation behaviour of monolithic aluminium (Al 7075-T651) and titanium (Ti-Gr.37) cover plates of composite sandwich panels are experimentally evaluated using a gas gun setup and fragment simulating projectile (FSP). The experimental results are used for validation of computational model of cover plates, which is further used for development of computational model of auxetic composite sandwich panel. It is shown that by using the auxetic sandwich panel, the ballistic performance is enhanced in comparison to the monolithic cover plates.

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Investigation on deformation process of cellular structures with gradient topology manufactured additively

Cited by 14 publications

References 23 publications

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

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

Investigations on Mechanical Properties of Lattice Structures with Different Values of Relative Density Made from 316L by Selective Laser Melting (SLM)

Response of Chiral Auxetic Composite Sandwich Panel to Fragment Simulating Projectile Impact

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