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A Four-Node Tetrahedral Finite Element Based on Space Fiber Rotation Concept


The paper presents a four-node tetrahedral solid finite element SFR4 with rotational degrees of freedom (DOFs) based on the Space Fiber Rotation (SFR) concept for modeling three-dimensional solid structures. This SFR concept is based on the idea that a 3D virtual fiber, after a spatial rotation, introduces an enhancement of the strain field tensor approximation. Full numerical integration is used to evaluate the element stiffness matrix. To demonstrate the efficiency and accuracy of the developed four-node tetrahedron solid element and to compare its performance with the classical four-node tetrahedral element, extensive numerical studies are presented.

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An Eight-Node Hexahedral Finite Element with Rotational DOFs for Elastoplastic Applications

analysis”, International Journal for Numerical Methods in Engineering , vol. 80, no. 13, pp. 1640-1686, 2009. [14] Schwarze, M., Vladimirov, I. N., & Reese, S., “Sheet metal forming and springback simulation by means of a new reduced integration solid-shell finite element technology”, Computer Methods in Applied Mechanics and Engineering , vol. 200, no. 5-8, pp. 454-476, 2011. [15] Wang, P., Chalal, H., & Abed-Meraim, F., “Quadratic solid–shell elements for nonlinear structural analysis and sheet metal forming simulation”, Computational Mechanics , vol. 59

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GNU Radio Based Testbed (GRaTe-BED) for Evaluating the Communication Link of Unmanned Aerial Systems

:// . [4] Makkay, I., “Fight of drones” (“Drónok harca”), 2015 . [5] Bob Kerczewski, Jeff Wilson, Bill Bishop – “Frequency Spectrum for Integration of Unmanned Aircraft”, NASA . [6] Yanmaz, E.; Kuschnig, R.; Bettstetter, C., “Channel Measurements over 802.11a-based UAV-to Ground Links” . [7] Steve Gardner, “A

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