International Journal of Recent Technology and Engineering (IJRTE) ISSN: 2277-3878, Volume-8 Issue-4, November 2019 1079 Published By: Blue Eyes Intelligence Engineering & Sciences Publication Retrieval Number: D6488118419/2019©BEIESP DOI:10.35940/ijrte.D6488.118419 Abstract: Gears are the key elements used to transmit power or motion from on shaft to another and it has wide range of applications. It's one of the major application is in the automobile gear box. Generally, gears fail when the working stress exceeds than the maximum permissible value. Here the generated stresses are directly in relation to amount power produced inside an engine, as well as also on torque. This study mainly focuses to identify the magnitude of the bending stresses generated in the selected gear set of CVT of a two-wheeler during power transmission as well as also tried to find different ways for reducing weight of the gear. Hence integrating the feature of topology optimization as a part of weight reduction over an existing part is considered as the key parameter of assessment for this work. In this study, gears of CVT gearbox of two-wheeler is analyzed for static loading under the application of tangential load resulting from maximum torque in the given application. After the study of the stress distribution on existing gears, the material removal area for weight reduction is identified on selected gears then the same study for stress distribution is carried out for proposed designs of topological optimization. Hence the both existing and proposed optimized designs are analyzed under static structural analysis for same loading and results for stress distribution are compared. Keywords: Bending Stress, CVT Gearbox, Tangential Load, Topology Optimization, Weight Reduction I. INTRODUCTION Gears are the most common means of transmitting power in the modern mechanical engineering world. They vary from a tiny size used in watches to the large gears used in watches to the large gears used in lifting mechanisms and speed reducers. They form vital elements of main and ancillary mechanisms in many machines such as automobiles, tractors, metal cutting machine tools etc. Toothed gears are used to change the speed and power ratio as well as direction between input and output. Topology Optimization (TO) is a mathematical method that optimizes material layout within a given design space, for a given set of loads, boundary conditions and constraints with the goal of maximizing the performance of the system. Revised Manuscript Received on November 15, 2019 * Correspondence Author Mit Patel*, Mechanical Department, Silver Oak College of Engineering and Technology, Ahmedabad, India, mitpatel.me@gmail.com Hadiya Valiulla, Mechanical Department, Silver Oak College of Engineering and Technology. Ahmedabad, India, hadiyaaatif.me@socet.edu.in Vinay Khatod, Automobile Department, Ganpat University, Mehsana, India, vkhatod92@gmail.com Bhavin Chaudhary, Mechanical Department, Silver Oak College of Engineering and Technology, Ahmedabad, India, bhavinchaudhary.me@socet.edu.in Vikas Gondalia, Mechanical Department, Silver Oak College of Engineering and Technology, Ahmedabad, India, vikasgondalia@gmail.com TO is different from shape optimization and sizing optimization in the sense that the design can attain any shape within the design space, instead of dealing with predefined configurations. The conventional TO formulation uses a finite element method [FEM] to evaluate the design performance. The design is optimized using either gradient-based mathematical programming techniques such as the optimality criteria algorithm and the method of moving asymptotes or non-gradient-based algorithms such as genetic algorithms. Topology Optimization has a wide range of applications in aerospace, automotive, mechanical, bio-chemical and civil engineering etc. thus TO is a key part of design for additive manufacturing. II. OBJECTIVE 1. As a part of designing of gears, there is still scope for research, especially when the performance is the main objective, with collected research data collected; it is noticeable that there is a scope to optimize gear geometry without affecting its strength. 2. Weight reduction provides much improved mechanical properties such as better strength to weight ratio, adequate hardness. Hence, less chances of failure. 3. Finite element analysis is viable approach to perform design optimization quickly as compared to solving complex partial differential equations. 4. Finite element approach can be utilized to identify stress and deformation in the gear geometry. 5. Optimizing the gear geometry by removing material from low stress regions can give improved design that can be beneficial for overall performance of the transmission system as well as better life of bearings and shafts. III. DIMENSIONS, TERMINOLOGIES AND MATERIAL This journal uses double-blind review process, which means that both the reviewer (s) and author (s) identities concealed from the reviewers, and vice versa, throughout the review process. All submitted manuscripts are reviewed by three reviewer one from India and rest two from overseas. There should be proper comments of the reviewers for the purpose of acceptance/ rejection. There should be minimum 01 to 02 week time window for it. Topology Optimization of Automotive Gear using Fea Mit Patel, Hadiya Valiulla, Vinay Khatod, Bhavin Chaudhary, Vikas Gondalia