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Article

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

by
Pavel Marsalek
1,*,
Martin Sotola
1,
David Rybansky
1,
Vojtech Repa
1,
Radim Halama
1,
Martin Fusek
1 and
Jiri Prokop
2,3
1
Deparment of Applied Mechanics, Faculty of Mechanical Engineering, VŠB—Technical University of Ostrava, 17. listopadu 2172/15, 708 00 Ostrava, Czech Republic
2
Department of Surgical Studies, Faculty of Medicine, University of Ostrava, Dvorakova 7, 701 03 Ostrava, Czech Republic
3
Department of Surgery, University Hospital Ostrava, 17. listopadu 1790/5, 708 00 Ostrava, Czech Republic
*
Author to whom correspondence should be addressed.
Materials 2021, 14(1), 140; https://doi.org/10.3390/ma14010140
Submission received: 19 November 2020 / Revised: 23 December 2020 / Accepted: 28 December 2020 / Published: 30 December 2020
(This article belongs to the Special Issue Selected Papers from Experimental Stress Analysis 2020)
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Abstract

Flexible structures (FS) are thin shells with a pattern of holes. The stiffness of the structure in the normal direction is reduced by the shape of gaps rather than by the choice of the material based on mechanical properties such as Young’s modulus. This paper presents virtual prototyping of 3D printed flexible structures with selected planar patterns using laboratory testing and computer modeling. The objective of this work is to develop a non-linear computational model evaluating the structure’s stiffness and its experimental verification; in addition, we aimed to identify the best of the proposed patterns with respect to its stiffness: load-bearing capacity ratio. Following validation, the validated computational model is used for a parametric study of selected patterns. Nylon—Polyamide 12—was chosen for the purposes of this study as an appropriate flexible material suitable for 3D printing. At the end of the work, a computational model of the selected structure with modeling of load-bearing capacity is presented. The obtained results can be used in the design of external biomedical applications such as orthoses, prostheses, cranial remoulding helmets padding, or a new type of adaptive cushions. This paper is an extension of the conference paper: “Modeling and Testing of 3D Printed Flexible Structures with Three-pointed Star Pattern Used in Biomedical Applications” by authors Repa et al.
Keywords: wearable; flexible; structure; stiffness; biomedical; mechanics; simulation; pattern; 3D print; PA12 wearable; flexible; structure; stiffness; biomedical; mechanics; simulation; pattern; 3D print; PA12

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MDPI and ACS Style

Marsalek, P.; Sotola, M.; Rybansky, D.; Repa, V.; Halama, R.; Fusek, M.; Prokop, J. Modeling and Testing of Flexible Structures with Selected Planar Patterns Used in Biomedical Applications. Materials 2021, 14, 140. https://doi.org/10.3390/ma14010140

AMA Style

Marsalek P, Sotola M, Rybansky D, Repa V, Halama R, Fusek M, Prokop J. Modeling and Testing of Flexible Structures with Selected Planar Patterns Used in Biomedical Applications. Materials. 2021; 14(1):140. https://doi.org/10.3390/ma14010140

Chicago/Turabian Style

Marsalek, Pavel, Martin Sotola, David Rybansky, Vojtech Repa, Radim Halama, Martin Fusek, and Jiri Prokop. 2021. "Modeling and Testing of Flexible Structures with Selected Planar Patterns Used in Biomedical Applications" Materials 14, no. 1: 140. https://doi.org/10.3390/ma14010140

APA Style

Marsalek, P., Sotola, M., Rybansky, D., Repa, V., Halama, R., Fusek, M., & Prokop, J. (2021). Modeling and Testing of Flexible Structures with Selected Planar Patterns Used in Biomedical Applications. Materials, 14(1), 140. https://doi.org/10.3390/ma14010140

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