Modal and Dynamic Analysis of Femur Bone for Different Bone-Implant Materials

Modal analysis and dynamic analysis are performed in the proposed work to determine the implant’s natural frequencies and critical cross sections using numerical analysis. The femur bone and implant model are designed using CT-scan data and SOLIDWORKS software, respectively. This model is imported into ABAQUS for free and fixed vibration analysis. The analysis is done for natural bone, stainless steel (SS) 316, cobalt-chromium (Co-Cr) alloy, and titanium (Ti) alloy. On a typical human prosthetic hip, this work performs a load based on patients weighing 102 kg. At the implant’s loading location, a critical activity-bearing 28.8 N m moment and a high peak load of 4200 N are introduced for analysis. The modal and dynamic analysis results are compared for different biocompatible materials. Natural bone has much lower modal frequencies than the SS 316L material. The Co-Cr and Ti alloy modal frequencies are comparable to the femur’s natural bone material. The best material for making implants is titanium alloy because it is lightweight, lesser von Mises stress and higher deformation for the same load, boundary conditions, and loading position in comparison with other materials.