Mechanical behavior of multiple-layered gradient cellular scaffolds with constant density: Experimental, analytical and numerical investigation-Reference-Cited by-同舟云学术

Mechanical behavior of multiple-layered gradient cellular scaffolds with constant density: Experimental, analytical and numerical investigation

Published:2023-08-22 Issue: Volume: Page:
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Author:

khanaki hamid reza¹^ORCID,Rahmati Sadegh²,Nikkhoo Mohammad²,Haghpanahi Mohammad³,Akbari Javad⁴

Affiliation:

1. Islamic Azad University Shahre Rey Branch

2. Islamic Azad University Science and Research Branch

3. Iran University of Science and Technology

4. Sharif University of Technology

Abstract

AbstractMultiple-layered scaffolds with various three-dimensional architectures by the additive manufacturing (AM) have been successfully fabricated and can be used in tissue engineering. This study aimed to investigate the effect of unit cell shape, Struts diameter and number of layers on the mechanical properties of multiple-layered scaffolds with constant porosity. All the lattice scaffolds in cylindrical form (outer diameter of 30 mm and length of 60 mm) were designed and fabricated from 18 various types with 70% porosity and in single, double and triple layers and by Selective Laser Sintering (SLS) method. In all the samples, the outer layers had a higher density compared to the inner layers. The mechanical properties of the scaffolds were determined by the uniform compression test. The stress-strain curves of the samples revealed that as the struts diameter increases, the yield stress increases due to the reduction of manufacturing defects. And the numerical simulations showed that the position of the maximum radial displacement shifts from the middle region to the top and bottom regions of the scaffold with the increase in the number of the layers. Also, a good convergence between the results of the finite element model and the experimental results was observed.

Publisher

Research Square Platform LLC

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