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Numerical and analytical simulation of multilayer cellular scaffolds

Khanaki, H. R ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1007/s40430-020-02335-0
  3. Publisher: Springer , 2020
  4. Abstract:
  5. Due to the advent and maturity of the additive manufacturing technology, it is possible now to construct complex microstructures with unprecedented accuracy. In addition, to the influence of network unit cell types and porosities in recent years, researchers have studied the number of scaffold layers fabricated by additive manufacturing on mechanical properties. The objective of this paper is to assess the numerical and analytical simulations of the multilayer scaffolds. For this purpose, 54 different regular scaffolds with a unit cell composed of multilayer scaffolds were simulated under compressive loading and compared with the analytical relationships based on the Euler–Bernoulli and Timoshenko's beam theories where the most appropriate theory was chosen for different unit cell sizes. Then, five types of two- and three-layer scaffolds of titanium alloy were simulated based on the previous data numerically and analytically, and the young's modulus and yield strength of the scaffolds were compared with the experimental results, where a good convergence between the results of the finite element model and previous experimental results were observed. Furthermore, the axial forces of the unit cell struts, in the transverse section, stress distribution, and displacement of the nodes in the scaffolds, were investigated, which was not possible experimentally. © 2020, The Brazilian Society of Mechanical Sciences and Engineering
  6. Keywords:
  7. Additive manufacturing ; Finite element method ; Implant ; Numerical analysis ; 3D printers ; Additives ; Biomechanics ; Cells ; Cytology ; Elastic moduli ; Multilayers ; Titanium alloys ; Additive manufacturing technology ; Analytical simulations ; Cellular scaffolds ; Complex microstructures ; Compressive loading ; Timoshenko's beam theory ; Transverse section ; Unit cell size ; Scaffolds (biology)
  8. Source: Journal of the Brazilian Society of Mechanical Sciences and Engineering ; Volume 42, Issue 5 , 2 May , 2020
  9. URL: https://link.springer.com/article/10.1007/s40430-020-02335-0