Numerical Simulation of Homogeneous, Two and Three Lattice Layers Scaffolds with Constant Density

Subject Areas :

Hamid Khanaki ¹ , Sadegh Rahmati ² , Mohammad Nikkhoo ³ , Mohammad Haghpanahi ⁴ , Javad Akbari ⁵

1 - Department of Mechanical Engineering, Sciences and Research Branch, Islamic Azad University, Tehran, Iran
2 - Department of Mechanical Engineering, Sciences and Research Branch, Islamic Azad University, Tehran, Iran
3 - Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
4 - Biomechanics Group, Department of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
5 - Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran

Received: 2020-03-07 Accepted : 2020-04-20 Published : 2020-05-01

Keywords: numerical analysis, Implant, Bone Scaffold, Additive Manufacturing,

Abstract :

Advances in the additive manufacturing technology have led to the production of complex microstructures with unprecedented accuracy and due todesigning an effective implant is a major scientific challenge in bone tissue regeneration and bone growth. In this research, titanium alloy cylindrical scaffolds with three-dimensional architectures have been simulated and compared for curing partial bone deficiencies. The cylindrical networks in the scaffold (outer diameter 15 and length 30 millimeters) were designed in 36 different convergent, two-layer and three-layer types with 50% and 70% porosity. In all the samples, outer layers were denser than the inner layers. Mechanical characteristics of these scaffolds have been determined by simulating uniform compression load. The stress-strain curve of the samples showed that Young’s modulus and yield stress in the scaffolds with constant porosity were related to a unit-cell and the two-layer scaffolds, without changing Young’s modulus, had higher yield stress. This advantage was more significant in high-density scaffolds.

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