Note for Design of Machine Elements - DME by Sunil Senthili

Topics ( 8 )

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ME6503 DESIGN OF MACHINE ELEMENTS LTPC3003 OBJECTIVES: • To familiarize the various steps involved in the Design Process • To understand the principles involved in evaluating the shape and dimensions of a component to satisfy functional and strength requirements. • To learn to use standard practices and standard data • To learn to use catalogues and standard machine components (Use of P S G Design Data Book is permitted) UNIT I STEADY STRESSES AND VARIABLE STRESSES IN MACHINE MEMBERS 10 Introduction to the design process - factors influencing machine design, selection of materials based on mechanical properties - Preferred numbers, fits and tolerances – Direct, Bending and torsional stress equations – Impact and shock loading – calculation of principle stresses for various load combinations, eccentric loading – curved beams – crane hook and ‘C’ frame- Factor of safety - theories of failure – Design based on strength and stiffness – stress concentration – Design for variable loading. ww w.E asy En UNIT II SHAFTS AND COUPLINGS 8 Design of solid and hollow shafts based on strength, rigidity and critical speed – Keys, keyways and splines - Rigid and flexible couplings. gin eer UNIT III TEMPORARY AND PERMANENT JOINTS 9 Threaded fasteners - Bolted joints including eccentric loading, Knuckle joints, Cotter joints – Welded joints, riveted joints for structures - theory of bonded joints. ing .ne t UNIT IV ENERGY STORING ELEMENTS AND ENGINE COMPONENTS 9 Various types of springs, optimization of helical springs - rubber springs - Flywheels considering stresses in rims and arms for engines and punching machines- Connecting Rods and crank shafts. UNIT V BEARINGS 9 Sliding contact and rolling contact bearings - Hydrodynamic journal bearings, Somerfield Number, Raimondi and Boyd graphs, -- Selection of Rolling Contact bearings. TOTAL: 45 PERIODS OUTCOMES: 2

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 Upon completion of this course, the students can able to successfully design machine Components TEXT BOOK: 1. Bhandari V, “Design of Machine Elements”, 3rd Edition, Tata McGraw-Hill Book Co, 2010. 2. Joseph Shigley, Charles Mischke, Richard Budynas and Keith Nisbett “Mechanical Engineering Design”, 8th Edition, Tata McGraw-Hill, 2008. REFERENCES: 1. Sundararajamoorthy T. V. Shanmugam .N, “Machine Design”, Anuradha Publications, Chennai, 2003. ww w.E 2. Robert C. Juvinall and Kurt M. Marshek, “Fundamentals of Machine Design”, 4th Edition, Wiley, 2005 asy 3. Alfred Hall, Halowenko, A and Laughlin, H., “Machine Design”, Tata McGraw-Hill BookCo.(Schaum’s Outline), 2010 En 4. Bernard Hamrock, Steven Schmid,Bo Jacobson, “Fundamentals of Machine Elements”,2nd Edition, Tata McGraw-Hill Book Co., 2006. gin eer 5. Orthwein W, “Machine Component Design”, Jaico Publishing Co, 2003. ing 6. Ansel Ugural, “Mechanical Design – An Integral Approach", 1st Edition, Tata McGraw-Hill Book Co, 2003. .ne 7. Merhyle F. Spotts, Terry E. Shoup and Lee E. Hornberger, “Design of Machine Elements” 8th Edition, Printice Hall, 2003. 3 t

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TABLE OF CONTENTS S.NO PAGE NUMBER TOPIC 1 Aim and Objective of the subject 5 2 Detailed Lesson Plan 6 UNIT-I-STEADY STRESSES AND VARIABLE STRESSES IN MACHINE MEMBERS 3 Part - A (2Marks Qn. &Ans.) 8 4 Part - B (13Marks Qn. &Ans.) 12 ww UNIT-II-SHAFTS AND COUPLINGS 5 Part - A (2Marks Qn. &Ans.) 35 6 Part - B (13Marks Qn. &Ans.) 39 w.E asy UNIT-III-TEMPORARY AND PERMANENT JOINTS En 7 Part - A (2Marks Qn. &Ans.) 8 Part - B (13Marks Qn. &Ans.) 68 gin 72 eer UNIT-IV-ENERGY STORING ELEMENTS AND ENGINE COMPONENTS 9 Part - A (2Marks Qn. &Ans.) 10 Part - B (13Marks Qn. &Ans.) ing 90 93 11 Part - A (2Marks Qn. &Ans.) .ne 12 Part - B (13Marks Qn. &Ans.) 121 13 PART – C ( UNIT I – UNIT V ) Part – C (15 Marks Qn. & Ans.) 137 14 Industrial / Practical Connectivity of the Subject 168 15 Anna University Previous Year Question Papers 170 UNIT-V-BEARINGS 118 4 t

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ME 6503 DESIGN OF MACHINE ELEMENTS LTPC3003 Aim and objective of the subject  To design is either to formulate a plan for the satisfaction of a specified need or to solve a problem.  Attain knowledge on the principles and procedure for the design of mechanical components.  To develop an ability to identify, formulate, and solve engineering problems.  To develop an ability to use the techniques, skills, and modern engineering tools necessary for engineering practice.  Develop an ability to apply knowledge of Mathematics, Science, and Engineering ww  To analyze the stress on mechanical machine elements and understand, identify w.E and quantify failure modes of machine elements  To design machine elements to withstand load and deformations for a given application. asy En  To determine shape and dimensions of the component withstanding the load and gin stresses in the working environment.  To develop an ability to design a system, component, or process to meet desired needs within realistic constraints. eer ing  To understand the principles involved in evaluating the shape and dimensions of a component to satisfy functional and strength requirements.  .ne To estimate life or performance under static, fatigue, impact and creep loading conditions.  To learn to use catalogues and standard machine components  To learn to use standard practices and standard data 5 t