design modelling and analysis of single

DESIGN MODELING AND ANALYSIS OF SINGLE PLATE CLUTCH : 

DESIGN MODELING AND ANALYSIS OF SINGLE PLATE CLUTCH A project report submitted in partial fulfillment of the requirements for the award of the  Degree of “Bachelor of Technology” in Mechanical Engineering By A.SANTOSH KUMAR 07N75A0302 K.SURESH 07N75A0304 R.SIVA SRIHARI 07N75A0309 SK.JAKEER HUSSIAN  07N75A0311 UNDER THE GUIDANCE OF Mr. P.V.DURGA PRASAD (ASSO. PROFESSOR .DEPT OF MECH .ENGG.) D.R.K INSTITUTE OF SCIENCE AND TECHNOLOGY BOWREMPET, HYDERABAD .

OVERVIEW : 

OVERVIEW ABSTRACT INTRODUCTION REQUIREMENTS OF CLUTCH MATERIALS USED FOR FRICTION LINING TYPES OF CLUTCHES SINGLE PLATE CLUTCH DESIGN CALCULATIONS INTRODUCTION TO CATIA MODELING ANYSIS RESULTS CONCLUSION BIBLOGRAPHY 2/36

ABSTRACT : 

ABSTRACT A single plate clutch consists of only one clutch plate whose both sides are faced with a frictional material. A popularly known application of clutch is in automotive vehicles. The aim of the project is to design, model a single plate clutch and perform static & Thermal analysis on two different materials (Asbestos and Cotton fabric) by applying frictional force and temperatures produced by friction. Modeling of component is done in catia soft ware. ANSYS is used for static and thermal analysis of single plate clutch. 3/36

INTRODUCTION : 

INTRODUCTION A Clutch is a machine member used to connect or disconnects the driving shaft to a driven shaft. Single plate clutch is used in medium and heavy vehicles. Clutch is located in between flywheel and transmission system. Clutches allow a high inertia load to be stated with a small power. A clutch thus provides an interruptible connection between two rotating shafts. Clutch works on the principles of friction. When properly operated it prevents jerks during power flow. 4/36

CONSIDERATIONS IN DESIGNING A FRICTION CLUTCH : 

CONSIDERATIONS IN DESIGNING A FRICTION CLUTCH The suitable material for the friction surface should be selected. The moving parts of the clutch should have low weight in order to minimize the inertia. The clutch should have provision for facilitating repairs. It is usually designed to transmit 125 to150% of the maximum engine torque. Size of clutch should be small. Proper ventilation should be provided for dissipation of heat. Clutch should be positively take the drive with out occurrence of sudden jerks. 5/36

MATERIALS USED FOR FRICTION LINING : 

MATERIALS USED FOR FRICTION LINING The two materials in contact must have a high coefficient of friction. The materials in contact must resist wear effects, such as scoring, galling, and ablation. The friction value should be constant over a range of temperatures and pressures. The materials should possess good thermal properties, good thermal conductivity, withstand high temperatures. Able to withstand high contact pressures. Good shear strength to transferred friction forces to structure. Should be safe to use and acceptable for the environment. 6/36

TYPES OF CLUTCHES : 

TYPES OF CLUTCHES Positive clutches Friction clutches 7/36 Positive Four Jaw Clutch

FRICTION CLUTCHES : 

FRICTION CLUTCHES Cone Clutch Single Plate Clutch Multi plate Clutch Centrifugal Clutch Semi centrifugal Clutch 8/36

FRICTION CLUTCHES : 

FRICTION CLUTCHES 9/36 Cones: female= green, male= blue. Shaft: male cone is sliding on splines. Friction material: male cone. Spring: brings the male cone back after using the clutch control. Clutch control: separating both cones by pressing. Rotating direction: both direction of the axis are possible. cone clutch

FRICTION CLUTCHES : 

FRICTION CLUTCHES 10/36 Single plate clutch Friction plate is held between the flywheel and the pressure plate. Springs are arranged circumferentially. Friction plate is mounted on a hub. A pedal is provided to pull the pressure plate against the spring force when it is required to be disengaged.

FRICTION CLUTCHES : 

FRICTION CLUTCHES Multi plate clutch 11/36

FRICTION CLUTCHES : 

FRICTION CLUTCHES Centrifugal clutch 12/36

FRICTION CLUTCHES : 

FRICTION CLUTCHES SEMI CENTRIFUGAL CLUTCH 13/36

DESIGN CALCULATIONS : 

DESIGN CALCULATIONS CLUTCH IS DESIGNED BASED ON TWO THEORYS UNIFORM PRESSURE THEORY UNIFORM WEAR THEORY 14/36

Slide 15: 

UNIFORM PRESSURE THEORY T= Torque transmitted by engine= μ *w *R μ =Co-efficient of friction of material. W =Axial force = π*pr*(ro-ri). R=Effective mean radius= 2/3 * (ro3- ri3 / ro2 – ri2 ). Pr = intensity of pressure T = μ*2/3* (ro3- ri3 / ro2 – ri2 ). *( π.pr .(ro2-ri2)). 15/36 DESIGN CALCULATIONS

DESIGN CALCULATIONS : 

DESIGN CALCULATIONS UNIFORM WEAR THEORY T= Torque transmitted by engine=2*μ *w*R μ =Co-efficient of friction of material. W =Axial force = 2.π. (p*ri) (ro- ri). R=Effective mean radius = (ri + ro ) ∕ 2 . T = 1/2*μ *(ro+ri)(2π.pr.(ro-ri)) 16/36

Slide 17: 

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MODELING OF SINGLE PLATE CLUTCH : 

MODELING OF SINGLE PLATE CLUTCH THE MODELING OF SINGLE CLUTCH IS DONE BY USING CATIA V-5 Catia is an 3d mechanical suite. It is much faster and more accurate. It provides a greater flexibility for change. It is user friendly both solid and surface modeling can be done. 18/36

MODELING OF SINGLE PLATE CLUTCH : 

MODELING OF SINGLE PLATE CLUTCH FRICTION PLATE 19/36

MODELING OF SINGLE PLATE CLUTCH : 

MODELING OF SINGLE PLATE CLUTCH PRESSURE PLATE 20/36

ANSYS : 

ANSYS ANSYS is general-purpose finite element analysis (FEA) software package. It is a numerical method of deconstructing a complex system into very small pieces. This type of analysis is typically used for the design and optimization of a system far too complex to analyze by hand.  Static Analysis. Transient Dynamic Analysis. Buckling Analysis. Thermal Analysis. 21/36

ANSYS : 

ANSYS The generally the analysis procedure Import the model. Select the element type. Apply material properties. Generate Meshing process. Applying loads 1.displacement loads. 2.pressure loads. Obtain Solution. Present the Results. 22/36

Analysis of single plate clutch : 

Analysis of single plate clutch 23/36 Generate Mesh Imported model

Analysis of single plate clutch : 

Analysis of single plate clutch ASBESTOS MATERIAL Input parameters Young’s modulus-164.8*10-3 N/mm^2. Co-efficient of friction-0.37. Poisson's ratio-0.2. Density-470Kg/mm^3. Thermal conductivity-0.74 w/mk. Sp heat-0.84 Kj/kg k. 24/36

Analysis of single plate clutch : 

Analysis of single plate clutch 25/36 Applied loads on single plate clutch

Analysis of single plate clutch : 

Analysis of single plate clutch 26-36 Maximum displacement of single plate clutch Ultimate stress distribution on single plate clutch

Analysis of single plate clutch : 

Analysis of single plate clutch 27-36 Temperature distribution on single plate clutch Thermal gradient vector on single plate clutch

Analysis of single plate clutch : 

Analysis of single plate clutch Cotton fabric material Input parameters Young’s modulus-150*10 N/ mm^2. Co-efficient of friction -0.45. Poisson's ratio-0.15. Density-100 Kg/mm^3. Thermal conductivity-0.03 w/mk. Sp heat-0.31Kj/kg k. 28/36

Analysis of single plate clutch : 

Analysis of single plate clutch 29/36 Applying loads on single plate clutch

Analysis of single plate clutch : 

Analysis of single plate clutch 30-36 Maximum displacement of single plate clutch Ultimate stress distribution on single plate clutch

Analysis of single plate clutch : 

Analysis of single plate clutch 31-36 Temperature distribution on single plate clutch Thermal gradient vector on single plate clutch

Results : 

Results 32/36

Static analysis : 

Static analysis 33/36 Displacement in mm Ultimate stress in N/mm^2

Thermal analysis : 

Thermal analysis 34/36 TEMPERATURE IN K

Conclusion : 

Conclusion 35/36 It is concluded that the single plate clutch transmitting 85KW power theoretically, the performance of single plate clutch of different asbestos and cotton fabric material, the asbestos material with in the safe limit, and is used as a single plate clutch material It is observed that the design parameters displacement, temperature, ultimate stress and thermal gradient of asbestos material is safe

Bibliography : 

Bibliography Automobile engineering by Kirpal Singh. Automobile engineering by R.B.Gupta. Machine design by P.Kannaiah. Machine design by N.C.Pandya & C.S.Shah. http://nptel.iitm.ac.in/courses/Machine_Design_II. http://www.tech.plym.ac.uk/sme/desnotes/desclut.htm. 36/36

Thank you : 

Thank you .