Modeling and Testing of Flexible Structures with Selected Planar Patterns Used in Biomedical Applications

Maršálek, Pavel; Šotola, Martin; Rybanský, David; Repa, Vojtech; Halama, Radim; Fusek, Martin; Prokop, J.

doi:10.3390/ma14010140

Cited by 17 publications

(18 citation statements)

References 24 publications

(28 reference statements)

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“…After years of development and later innovation, the 3D printing technology has derived new printing methods, such as biological 3D printing [ 106 ], and solvent casting 3D printing [ 107 , 108 ], etc. These new printing methods have been gradually applied in biological applications [ 109 , 110 ], electronics [ 111 ], wearable devices [ 112 , 113 ], and other fields. Conductive polymer nanocomposites (CPNs) prepared with traditional silver nanoparticles as fillers have good electrical conductivity, but the use of plenty of precious metal silver also restricts its application in industry.…”

Section: 3d Printing Of Conductive Carbon Materialsmentioning

confidence: 99%

A Review of Conductive Carbon Materials for 3D Printing: Materials, Technologies, Properties, and Applications

et al. 2021

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Carbon material is widely used and has good electrical and thermal conductivity. It is often used as a filler to endow insulating polymer with electrical and thermal conductivity. Three-dimensional printing technology is an advance in modeling and manufacturing technology. From the forming principle, it offers a new production principle of layered manufacturing and layer by layer stacking formation, which fundamentally simplifies the production process and makes large-scale personalized production possible. Conductive carbon materials combined with 3D printing technology have a variety of potential applications, such as multi-shape sensors, wearable devices, supercapacitors, and so on. In this review, carbon black, carbon nanotubes, carbon fiber, graphene, and other common conductive carbon materials are briefly introduced. The working principle, advantages and disadvantages of common 3D printing technology are reviewed. The research situation of 3D printable conductive carbon materials in recent years is further summarized, and the performance characteristics and application prospects of these conductive carbon materials are also discussed. Finally, the potential applications of 3D printable conductive carbon materials are concluded, and the future development direction of 3D printable conductive carbon materials has also been prospected.

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Section: 3d Printing Of Conductive Carbon Materialsmentioning

confidence: 99%

A Review of Conductive Carbon Materials for 3D Printing: Materials, Technologies, Properties, and Applications

et al. 2021

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“…In the case of the lightweight design, there were difficulties in printing the internal (additional) supports. The stiffeners did not always perform their role correctly and, ultimately, the printed specimens had incorrect geometry [ 32 ]. The stiffener thickness causes the incorrectness of the geometry [ 33 ].…”

Section: Discussionmentioning

confidence: 99%

Numerical and Experimental Study of a Lattice Structure for Orthopedic Applications

2023

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Prosthetic reconstructions provide anatomical reconstruction to replace bones and joints. However, these operations have a high number of short- and long-term complications. One of the main problems in surgery is that the implant remains in the body after the operation. The solution to this problem is to use biomaterial for the implant, but biomaterial does not have the required strength characteristics. The implant must also have a mesh-like structure so that the bone can grow into the implant. The additive manufacturing process is ideal for the production of such a structure. The study deals with the correlation between different prosthetic structures, namely, the relationship between geometry, mechanical properties and biological additivity. The main challenge is to design an endoprosthesis that will mimic the geometric structure of bone and also meet the conditions of strength, hardness and stiffness. In order to match the above factors, it is necessary to develop appropriate algorithms. The main objective of this study is to augment the algorithm to ensure minimum structural weight without changing the strength characteristics of the lattice endoprosthesis of long bones. The iterative augmentation process of the algorithm was implemented by removing low-loaded ribs. A low-loaded rib is a rib with a maximum stress that is less than the threshold stress. Values within the range (10, 13, 15, 16, 17, 18, 19 and 20 MPa) were taken as the threshold stress. The supplement to the algorithm was applied to the initial structure and the designed structure at threshold stresses σf = 10, 13, 15, 16, 17, 18, 19 and 20 MPa. A Pareto diagram for maximum stress and the number of ribs is plotted for all cases of the design: original, engineered and lightened structures. The most optimal was the designed “lightweight” structure under the condition σf = 17 MPa. The maximum stress was 147.48 MPa, and the number of ribs was 741. Specimens were manufactured using additive manufacturing and then tested for four-point bending.

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“…However, this paper should help with the initial estimates. After finding the optimal formulations and their parameters, one could prepare scripts for automated designing of customized structures such as prosthetic aids [14,44] or scripts for automated designing of mountain climbing equipment [45].…”

Section: Discussionmentioning

confidence: 99%

Sensitivity Analysis of Key Formulations of Topology Optimization on an Example of Cantilever Bending Beam

et al. 2021

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Topology optimization is a modern method for optimizing the material distribution in a given space, automatically searching for the ideal design of the product. The method aims to maximize the design performance of the system regarding given conditions. In engineering practice, a given space is first described using the finite element method and, subsequently, density-based method with solid isotropic material with penalty. Then, the final shape is found using a gradient-based method, such as the optimality criteria algorithm. However, obtaining the ideal shape is highly dependent on the correct setting of numerical parameters. This paper focuses on the sensitivity analysis of key formulations of topology optimization using the implementation of mathematical programming techniques in MATLAB software. For the purposes of the study, sensitivity analysis of a simple spatial task—cantilever bending—is performed. This paper aims to present the formulations of the optimization problem—in this case, minimization of compliance. It should be noted that this paper does not present any new mathematical formulas but rather provides an introduction into the mathematical theory (including filtering methods and calculating large-size problems using the symmetry of matrices) as well as a step-by step guideline for the minimization of compliance within the density-based topology optimization and search for an optimal shape. The results can be used for complex commercial applications produced by traditional manufacturing processes or by additive manufacturing methods.

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Modeling and Testing of Flexible Structures with Selected Planar Patterns Used in Biomedical Applications

Cited by 17 publications

References 24 publications

A Review of Conductive Carbon Materials for 3D Printing: Materials, Technologies, Properties, and Applications

A Review of Conductive Carbon Materials for 3D Printing: Materials, Technologies, Properties, and Applications

Numerical and Experimental Study of a Lattice Structure for Orthopedic Applications

Sensitivity Analysis of Key Formulations of Topology Optimization on an Example of Cantilever Bending Beam

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