IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308 _______________________________________________________________________________________________ Volume: 05 Issue: 10 | Oct-2016, Available @ http://ijret.esatjournals.org 251 ANALYSIS OF GEARBOX CASING AND EFFECT OF FERQUENCY ON STRESS AND STRAIN USING FEA Neeta T Chavan 1 , Gunchita Kaur-Wadhwa 2 , Basavaraj S.Talikoti 3 1 Student, M.E. Design, Mechanical Department, Pillai Hoc, Maharashtra, India 2 Assistant Professor, Mechanical Department, Pillai Hoc, Maharashtra, India 3 Associate Professor, Mechanical Department, PIIT Panvel, Maharashtra, India Abstract Gearbox casing is the main component in automobile world which is used to protect components inside the gearbox. It consists of gears, shafts, bearings and oil. It is fluid containing casing which gives support to the moving parts. Gearbox failure occurs mainly due to the design issues, manufacturing defects, oil deficiency, excessive time at stoppage and high loading. In this project loading case is considered. Major challenge for such problems are whether to consider static analysis, dynamic analysis, or perturbation analysis and conditional circumstances for it to be performed. In this work static dynamic as well as perturbation analysis have been performed on gearbox casing. Model is to be developed in Abaqus/CAE and then same model is used for Finite Element Analysis by using Abaqus/Standard 6.10.1 for static analysis and dynamic analysis. Harmonic analysis is also performed by Abaqus software called as perturbation analysis for strain and frequency. Stress and frequency graph in both the cases that is in static and dynamic analysis is performed and results from static and dynamic are compared. Frequency effect on strain levels are linear and no surplus strain linearity is produced due to dynamic effect as compared to the static case. By using Abaqus/ standard it is found that results boost for dynamic case as compared to static case. Keywords: Gearbox Casing, Abaqus/CAE, Static stress analysis, Maximum Principle Stress, Minimum Principle Stress Dynamic Analysis --------------------------------------------------------------------***-------------------------------------------------------------------- 1. INTRODUCTION Gearbox casing is the shell in which assembly of gears are sealed. The components of gearbox casing are gears, bearings, shafts and oil. The gearbox casing act as house the transmission components. The movement of the gear produces vibration in the gearbox casing. Any automobile vehicle requires high torque when they are climbing an elevated surface like a mountain and also at the initial idling, as its speeds is very low. But when vehicle is running with high speeds on plane road high torque is not required due to momentum. Therefore, the device which is required for two reasons, torque speed combination range and to maintain engine speed according to road condition as per drivers need. This device is known as gearbox or transmission box. Lower gears have high torque and low power. Higher gears have high power but low torque. Due to the engine power stroke, the input shaft rotates once. Hence, the output shaft rotates around 0.5 times. Then two such power strokes are required for one full rotation of output shaft which means that all power is transferred into one rotation. Hence, it has high torque. In case of high gear, the input shaft rotates only once means one power stroke, and the output shaft rotates several times. One power stroke rotates the output shaft several times. Hence the high speed, high power but low torque. Therefore, torque, speed and power are important factors in gearbox. 1.1 Function of Gearbox Paragraph comes content here. PaThe function of gearbox is to change torque and speed of the vehicle according to road condition. Sometimes it is called as torque convertor because it is used to change the speed and torque according to road and load condition. Gearbox changes the engine speed into torque when they are running on a hilly road. The main function of the gearbox is  Provision of appropriate torque  Shifting of Gear for Neutral and Reverse position. 1.2 Gearbox Main Components In a gearbox four components are required to achieve its function. These components are  Counter Shaft  Main shaft  Gears  Bearings 2. LITERATURE REVIEW This chapter provides Review of Literature on topics related to gearbox casing. More work has been done for analysis of gearbox casing by using vibrational analysis by condition monitoring techniqecs, FFT analyser, timefeequency domain analysis also FEA analysis by using ANSYS. MirunaliniThirugnanasambandam, [1] determined the design and static analysis, natural frequency of casing and