Projeto e análise estrutural de embreagem de fricção de placa única

Design and structural analysis of single plate friction clutch

Design and structural analysis of single plate friction clutch

Abstract

In the design of automobile friction clutches, knowledge of the thermoelasticity property is very informative in the initial design phase. Especially, the accurate maximum structural stress prediction technique should be requested in the design of mechanical clutches for their durability and compactness.
In this study, an efficient and reliable analysis technique for the design of mechanical clutches is developed using computational modeling and numerical method. This work contains stress analysis of the automobile's single-disc clutch, in which an attempt is made to reduce the stresses and forces developed in the clutch with the help of a software approach. Detailed clutch study and clutch modeling is done in pro-e software and analysis is done in Ansys software. Also in this work an efficient and reliable mechanical clutch design is discovered.

Introduction

A clutch is a device used in a vehicle's transmission system to engage and disengage the transmission system from the engine. Thus, the clutch is located between the engine and the transmission system. In a vehicle, the clutch is always in the engaged position. The clutch is
disengaged when starting the engine, changing gear, stopping the vehicle and leaving the engine at idle. It is disengaged by activating the clutch pedal, that is, pressing the pedal towards the vehicle floor. The clutch is engaged when the vehicle needs to move and is held in the engaged position when the vehicle is moving. The clutch also allows gradual lifting of the load when operated correctly; prevents sudden movements of the vehicle and thus avoids undue stress on the remaining parts of the power transmission.

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Clutch discs in automobiles and motorcycles

The clutch disc in a car is controlled by the leftmost pedal. This makes use of hydraulic system or cable connection. The clutch may be physically located close to the pedal, but a means of remote actuation is required to remove the effect of the engine's slight movement. If there is no pressure on the pedal, it means that the clutch discs are engaged. It is disengaged when the clutch pedal is pressed. Cars can also work with manual transmission. In this there are gears that have corresponding teeth to synchronize the speed. You can select the gears with the help of these gears. On motorcycles, the clutch is operated by the clutch lever. You can engage the clutch disc without applying pressure to the lever. Pulling the lever back towards the driver disengages the clutch discs. Slipper clutch plates are often used on racing motorcycles to eliminate engine braking.

Structural analysis

Structural analysis comprises the set of physical and mathematical laws necessary to study and predict the behavior of structures. The subjects of structural analysis are engineering artifacts whose integrity is assessed largely based on their ability to bear loads; they generally include buildings, bridges, aircraft, and ships. Structural analysis incorporates the fields of mechanics and dynamics, as well as the many theories of failure. From a theoretical perspective, the main objective of structural analysis is the calculation of deformations, internal forces and stresses. In practice, structural analysis can be viewed more abstractly as a method for driving the engineering design process or proving the soundness of a design without relying on testing it directly.

single-plateclutch analysis Total deformation of the clutch plate

It consists of linear and non-linear models. Linear models use simple parameters and assume that the material is not plastically deformed. Nonlinear models consist of tensioning the material beyond its elastic capabilities. The stresses in the material then vary with the amount of deformation.

It includes the following methods,

1) Analytical Methods

2) Material resistance methods (classic
methods)

3) Finite element methods (FEM)

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