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Bauschinger Effect on Micro-Lattice of Ti-6al-4v Implants by Using Finite Element Analysis

Amit Bhumarker, Abhishek Singh

Abstract


This research's primary objective is to apply the Bauschinger effect to develop a micro-lattice of titanium alloy implants using nonlinear finite element analysis. In orthopedics, micro-lattice cellular Ti-6Al-4V designs with controlled porosity and pore sizes that are good for tissue ingrowth and biological mechanisms are often used. In this investigation, CAD models of various unit lattice structures were generated using Intra-Lattice software, incorporating design parameters such as strut length, strut cross-section, and pore size. Intra-Lattice is a tool for showing parametric lattices made on Grasshopper, a visual algorithm editor for Rhino CAD software. This research gives grid, Star, and Tesseract structures as three different unit cells. The mechanical characteristics of these three lattice- based cellular structures are analyzed using finite element analysis (FEA). For Finite element modeling, beam elements were used to represent micro-lattice structures under various stress circumstances (i.e., tension and compressive). Finite element simulations were conducted to evaluate the functional and load-bearing efficiency of the three specified unit cells. In the final stage of this experiment, modifications were made to the unit cell's topology aiming to enhance its stiffness and yield stress under loading. According to Finite Element Simulations, changes to the unit cell geometry can improve stiffness and yield strength. The above research results will eventually be used to make unique implants for each patient.


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References


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DOI: https://doi.org/10.37628/ijnn.v9i1.997

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