JNTUA B.Tech. R20 Regulations

########## JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY ANANTAPUR B.Tech (ME) - III-I Sem L T P C 3 0 0 3 (20A03502) DESIGN OF MACHINE MEMBERS Course Objectives:

- • Provide an introduction to design of machine elements.
- • Familiarize with fundamental approaches to failure prevention for static and dynamic loading.
- • Explain design procedures to different types of joints.
- • Teach principles of clutches and brakes and design procedures.
- • Instruct different types of bearings and design procedures.

########## Course Outcomes:

At the end of the course the students will be able to

- • Estimate safety factors of machine members subjected to static and dynamic loads. (L5)
- • Design fasteners subjected to variety of loads. (L6)
- • Selectof standard machine elements such as keys, shafts, couplings, springs and bearings. (L1)
- • Design clutches brakes and spur gears. (L6)

UNIT IIntroduction, Design for Static and Dynamic loads Design process, design considerations, codes and standards of Mechanical Engineering Design: Design process, design considerations, codes and standards of Mechanical Engineering Design: designation of materials, selection of materials. Modes of failure, design of components subjected to axial, bending, torsional Design for Static Loads: for Static Loads: and impact loads. Theories of failure for static loads. Endurance limit, fatigue strength under axial, bending and torsion, stress Design for Dynamic Loads: for Dynamic Loads: concentration, notch sensitivity. Types of fluctuating loads, fatigue design for infinite life. Soderberg, Goodman and modified Goodman criterion for fatigue failure. Fatigue design under combined stresses.

UNIT IIDesign of Bolted and Welded Joints Threaded fasteners, preload of bolts, various stresses induced in the bolts. Design of Bolted Joints: Threaded fasteners, preload of bolts, various stresses induced in the bolts. Design of Bolted Joints: Torque requirement for bolt tightening, gasketed joints and eccentrically loaded bolted joints. Strength of lap and butt welds, Joints subjected to bending and torsion. Eccentrically Welded Joints: Joints: loaded welded joints.

UNIT IIIPower transmission shafts and Couplings Design of shafts subjected to bending, torsion and axial loading. Shafts Power Transmission Shafts: Design of shafts subjected to bending, torsion and axial loading. Shafts Power Transmission Shafts: subjected to fluctuating loads using shock factors. Couplings: of flange and bushed pin couplings, universal coupling. Couplings: of flange and bushed pin couplings, universal coupling. UNIT IVDesign of Clutches, Brakes and Springs Torque transmitting capacity of disc and centrifugal clutches. Uniform wear theory Friction Clutches: Torque transmitting capacity of disc and centrifugal clutches. Uniform wear theory Friction Clutches: and uniform pressure theory. Different types of brakes. Concept of self-energizing and self-locking of brake. Band and block Brakes: brakes, disc brakes. Springs: of helical compression, tension, torsion and leaf springs. Springs: of helical compression, tension, torsion and leaf springs. UNITVDesign of Bearings and Gears Lubrication modes, bearing modulus, McKee's equations, design Design of Sliding Contact Bearings: Lubrication modes, bearing modulus, McKee's equations, design Design of Sliding Contact Bearings: of journal bearing. Bearing Failures. Static and dynamic load capacity, Stribeck's Equation, equivalent Design of Rolling Contact Bearings: of Rolling Contact Bearings: bearing load, load-life relationships, load factor, selection of bearings from manufacturer's catalogue. Spur gears, beam strength, Lewis equation, design for dynamic and wear loads. Design of Gears: of Gears: Design of helical compression, tension, torsion and leaf springs. Design of flange and bushed pin couplings, universal coupling.

Couplings: of flange and bushed pin couplings, universal coupling. Couplings: of flange and bushed pin couplings, universal coupling. UNIT IVDesign of Clutches, Brakes and Springs Torque transmitting capacity of disc and centrifugal clutches. Uniform wear theory Friction Clutches: Torque transmitting capacity of disc and centrifugal clutches. Uniform wear theory Friction Clutches: and uniform pressure theory. Different types of brakes. Concept of self-energizing and self-locking of brake. Band and block Brakes: brakes, disc brakes. Springs: of helical compression, tension, torsion and leaf springs. Springs: of helical compression, tension, torsion and leaf springs. UNITVDesign of Bearings and Gears Lubrication modes, bearing modulus, McKee's equations, design Design of Sliding Contact Bearings: Lubrication modes, bearing modulus, McKee's equations, design Design of Sliding Contact Bearings: of journal bearing. Bearing Failures. Static and dynamic load capacity, Stribeck's Equation, equivalent Design of Rolling Contact Bearings: of Rolling Contact Bearings: bearing load, load-life relationships, load factor, selection of bearings from manufacturer's catalogue. Spur gears, beam strength, Lewis equation, design for dynamic and wear loads. Design of Gears: of Gears: Design of helical compression, tension, torsion and leaf springs.

Springs: of helical compression, tension, torsion and leaf springs. Springs: of helical compression, tension, torsion and leaf springs. UNITVDesign of Bearings and Gears Lubrication modes, bearing modulus, McKee's equations, design Design of Sliding Contact Bearings: Lubrication modes, bearing modulus, McKee's equations, design Design of Sliding Contact Bearings: of journal bearing. Bearing Failures. Static and dynamic load capacity, Stribeck's Equation, equivalent Design of Rolling Contact Bearings: of Rolling Contact Bearings: bearing load, load-life relationships, load factor, selection of bearings from manufacturer's catalogue. Spur gears, beam strength, Lewis equation, design for dynamic and wear loads. Design of Gears: of Gears:

########## Textbooks:

- 1. R.L. Norton, Machine Design an Integrated approach, 2/e, Pearson Education, 2004.
- 2. V.B.Bhandari, Design of Machine Elements, 3/e, Tata McGraw Hill, 2010.
- 3. Dr. N. C. Pandya &Dr. C. S. Shah, Machine design, 17/e, Charotar Publishing House Pvt. Ltd, 2009.