Finite element analysis of new design artificial hip prosthesis

Bone is an organ with solid and hard structures that form the human skeleton and is a part of the human body that is vital in its role. Human bones have several problems such as decreased strength (Osteoporosis), contracting diseases such as bone cancer and arthritis, and human bones can fracture due to accidents or harsh impacts. For these cases, the alternative treatment given to patients is an artificial bone replacement. The choice of implant material is very important especially at the location of the joint, such as the hip prosthesis joint (hip bone). At the joint location, it needs materia ls that have good strength and wear resistance. Besides that, the design of the hip prosthesis joint implant is also very influenced by the patient's treatment results. A metal-on-metal (MoM) model that is without the use of bone cement (cementless) is more suitable for application in young patients who have high mobility in activity. The MoM model with the same material was chosen with the reason to prevent corrosion in the body cause environmental effect. Geometries design also plays an important role in the healing process and patient comfort. Forces applied to the implant due to human activity generates several forces and failed implant material. Therefore, it is important to ensure the hip prostheses against static force. ln this study, five Artificial Hip Prosthesis (AHP) designs with varying thickness and number of holes for hip prosthesis were modeled. Static behavior and responses of these AHP designs were analyzed using ANSYS 19.1. Static analyses were conducted under body load. SolidWorks 2014 was used for CAD modeling of the AHP designs. The performance of the new AHP designs was investigated for CoCrMo and SS 316L materials and compared to each other. The design objective for AHP design is to have a low equivalent von misses stress (safety factor) and displacement. Based on the static analysis result, the safety factor for the fatigue life of the implant design has been calculated based on Goodman, Soderberg, and Gerber fatigue theories. The result shows that Design made of CoCrMo is better than SS 316L.