www.jenrs.com Journal of Engineering Research and Sciences, 1(8): 01-11, 2022 1 Received: 28 February, 2022, Accepted: 20 July, 2022, Online: 19 August, 2022 DOI: https://dx.doi.org/10.55708/js0108001 Studies on Stress Analysis of Hip Prosthesis Implant Chetan Mohanlal Wani * , Sachin Ratnakar Deshmukh, Ratnakar Raghunath Ghorpade School of Mechanical Engineering, Dr. Vishwanath Karad MIT-World Peace University, Pune-411038, Maharashtra India *Corresponding author: Chetan Wani, , Dr. Vishwanath Karad MIT-World Peace University, Pune-411038, Maharashtra India, +91-7972949080, Chetan.wani101@gmail.com ABSTRACT: Biomedical engineering has become a solution for many biological problems by the application of principles and problem-solving techniques. Pacemakers, artificial bone replacements, 3-D printed organs, and dental replacements are very common examples of an application of engineering in the biomedical field. In medical applications when there is a need for bone replacement in a patient who is suffering from arthritis, the hip joint replacement cannot be avoided. The use of the artificial hip joint is going more popular and has become a need in the case of arthritis. An artificial hip implant is essential for providing initial stability at the place of failure. The comparative study in this field is limited and needs to be studied thoroughly. This paper focuses on a comparative study of hip replacement implants using SS (stainless steel) and Ti6Al4V (titanium alloy). In this study, 3- dimensional finite element analysis (using ANSYS2020) of hip replacement implant is performed by applying directional loads to detect von-mises stress amount, stress locations, and deformation in the implant. Assembly of the hip replacement implant is modeled (using Fusion 360) and static structural analysis is separately done using two different materials (SS and Ti-6Al-4V) for the femoral stem and using HDPE and HDPE/0.25MWCNT/0.15 for acetabular cup and liners respectively. Boundary conditions and loads applied are unchanged while varying parameters are the neck angle of implant and materials used. A similar static structural analysis for the elevated liner and flat liner at three different shell inclinations is done separately using the model which has shown better results. This study will help the researchers for further study on stress analysis of hip prosthesis implants. KEYWORDS: Hip prosthesis, finite element analysis (FEA), Total hip arthroplasty (THA), Stainless Steel (SS), Ti Alloy (Ti-6Al-4V). 1. Introduction The human body has roughly 270 bones when it is born, but by adulthood, it has been lowered to 206 bones since some of the bones have bonded together [1]. The femur seems to be the longest and also highest load- carrying bone in the human body, joining the pelvic in the proximal and the tibia in the distal. Its length fluctuates from individual accounts for around a quarter of the body's height (45–50 cm in general) [2]. In the human body, the hip joint is considered one of the most critical joints. Knee and total hip surgeries are universally acknowledged as efficient and positive treatments for osteoarthritis of the joint [3]. Total hip arthroplasty (THA) is the medical term intended for hip replacement. Year after year, the total number of hip replacement operations is rising [4]. More effort has been made to satisfy the patient’s isolated requirements, for example by increasing the range of types and sizes of hip prostheses, a large proportion of THAs become loose after they have been implanted for decades [5]. This joint can decay due to numerous reasons that include osteoarthritis, atrophic arthritis, and avascular necrosis [6]. Stem or head rupture, wear and eventual metallosis illnesses, destabilization owing to bone breakage, necrosis or stress shielding, and infectious agents that develop a biofilm between of implant and the bone are all reasons for implant failure [7]. Strain and stress shielding, as results from the differing rigidity of implant materials and the neighboring bone, is a major concern with hip resurfacing arthroplasty (HRA) [8]. Aseptic loosening of the acetabulum due to stress shielding and altered load distribution within the adjacent bone structure is a common cause of total hip arthroplasty failure [9]. Studies projected that, worldwide, there are nearly one million surgeries of hip replacement done every year [10]. Implants are generally selected based on the patient's age and bone condition; for older patients,