The IUP Journal of Mechanical Engineering
Optimization of Automotive Drive Shaft for Better Fuel Economy and High Torsional Strength

Article Details
Pub. Date : Nov, 2020
Product Name : The IUP Journal of Mechanical Engineering
Product Type : Article
Product Code : IJME21120
Author Name : R M Shinde and S M Sawant
Availability : YES
Subject/Domain : Engineering
Download Format : PDF Format
No. of Pages : 13

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Abstract

Drive shaft is the most important component in transmission system which needs to be designed for high torsional strength. While designing the drive shaft for high shear strength, weight of the shaft is increased which reduces the efficiency of transmission system. Transmission system efficiency plays a crucial role in fuel economy and performance of vehicle. So for improving the transmission system efficiency, optimum design of each and every component becomes a need. Optimum design of drive shaft for less weight with strength constraint has greater impact on vehicle performance. In this paper, the drive shaft of light motor vehicle is selected for optimization. Based on the maximum torque needed to propel the vehicle, the torsional strength required at propeller shaft is calculated. The existing propeller shaft is investigated analytically for its torsional strength, maximum shear stress, maximum shear strain and angle of twist. These analytical results are compared with experimental and Finite Element Analysis (FEA) results. For FEA, the model required is developed in CATIA V5 R20. This 3D model is analyzed using Altair Hyper works. The shear strength obtained is used as constraint and thickness of the shaft is optimized in Altair Hyper works using optistruct solver. The optimization of propeller shaft has been carried out for reducing its weight and cost. Comparative reduction in material cost per car and improvement in fuel economy per kilometer are investigated.


Description

A drive shaft is a device that transmits the rotating force of an engine or a gear box to driving axles and is widely used in machinery including transport machines such as automobiles, ships and aircraft. The drive shaft is used for the transfer of motion from one point to another point, and the shaft which propels is referred to as the propeller shaft. Drive shaft is used for transmitting the rotary motion from the front end to the rear end of the vehicle to move the vehicle in forward or backward direction (Reimpell and Stroll, 1996). The torque capability of the drive shaft for selected vehicle is larger than 3500 Nm. The outer diameter of shaft is 50 mm, inner diameter is 43 mm and length is 660 mm (Report on Specification of Vehicles, 2016).


Keywords

Altair Hyper works, Optistruct, CATIA V5 R20, SPC

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