MD SYLLABUS
Unit 1: Introduction & Design of simple machine parts
Machine design, basic procedure of machine design, design of machine elements, selection
of materials, standards and codes, modes of failure, factor of safety, theories of elastic failure
Unit 2: Design for strength and rigidity
Transmission shafts, square and flat keys, flange and flexible couplings
Unit 3: Design of Power Screws, Springs
Design considerations, thread forms of screws and case study of design of screw jack
Types and terminology of mechanical springs and case study of design of helical spring
Unit 4: Spur Gears
Gear Selection, material selection, Basic modes of tooth failure, Gear Lubrication Methods,
Number of teeth and face width, Force analysis, Beam strength (Lewis) equation, Velocity
factor, Service factor, Load concentration factor, Effective load on gear, Wear strength
Estimation of module based on beam and wear strength, Estimation of dynamic tooth load
by velocity factor and Buckingham's equation
Unit 5: Rolling Contact Bearing
Types of rolling contact bearings, Static and dynamic load carrying capacities, Stribeck's
equation, equivalent bearing load, load life relationship, selection of bearing life, selection
of rolling contact bearings from manufacturer's catalogue. Selection of bearing for cyclic
loads and speeds- bearing with probability of survival other than 90%
Unit 6: Design of Belt Drive
Materials and construction of flat and V belts, geometric relationships for length of belt,
power rating of belts, concept of slip & creep, initial tension, effect of centrifugal force,
maximum power condition, Selection of Flat and V-belts from manufacturer's catalogue.