Mechatronics Bio-Design of Hip Prosthesis using Mechanic of Materials Analysis and Finite Element Method: A Proof of Concept

By the year 2030, there is expected an increase in hip arthroplasties between 43% and 70% compared to 2014. For this reason, a novel investigation was conducted in 2023 under the supervision of the Professional School of Mechatronic Engineering at Ricardo Palma University, focusing on a proof of concept for the design of a hip prosthesis using mechanics of materials analysis and finite element method. The mechanical design of the implant indicated that to withstand a weight load of Q=2300 N and achieve resulting displacements (URES) less than 0.008 mm, the minimum safety factor required is 3.93, as a result of the finite element analysis (FEA). The electronic design, consisting of an Arduino Mega 2560, two potentiometers, two MG996R servo motors, a MPU6050 accelerometer, and an OLED display, resulted in a voltage consumption of 5V separately for the control board and the others sensors and actuators. SolidWorks was used for stress studies, URES, and safety factor analysis in this design. Von Mises stress analysis revealed a maximum of 87.8 MPa at the stem-joint junction, while URES analysis determined a maximum displacement of 0.008 mm. In conclusion, favorable results were achieved. For future research, it is proposed to consider other geometries for the cross-section, optimizing the design, and conducting experimental studies of the loads.