Syllabus - Machine Component Design (AU602)

Stress concentration and fatigue

Causes of stress concentration; stress concentration in tension, bending and torsion; reduction of stress concentration, theoretical stress concentration factor, notch sensitivity, fatigue stress concentration factor, cyclic loading, endurance limit, S-N Curve, loading factor, size factor, surface factor. Design consideration for fatigue, Goodman and modified Goodman's diagram, Soderberg equation, Gerber parabola.

Shafts

Design of shaft under combined bending, twisting and axial loading; Shock and Fatigue factors, design for rigidity; Design of shaft subjected to dynamic load; Keys and Coupling: Design of keys and shaft couplings

Springs

Design of helical compression and tension springs, consideration of dimensional and functional constraints, design of leaf springs; fatigue loading of springs, surge in spring, nipping in spring. Power Screws: Design of power screw and power nut, differential and compound screw, design of simple screw jack.

Clutch

Definition, classification and requirement of clutch, design equation for power transmission and clutch dimensions for single plate, multi plate, centrifugal and cone clutch. Brake: Definition, classification and requirement of brake, energy absorption and heat dissipation through brake, design of shoe brake and double shoe brake, internal expanding brakes, band and block brake and disc brake.

Journal Bearing

Types of lubrication, viscosity, hydrodynamic theory, design factors, temperature and viscosity considerations, Reynold's equation, stable and unstable operation, heat dissipation and thermal equilibrium, boundary lubrication, dimensionless numbers, Design of journal bearings. Rolling-element Bearings: Types of rolling contact bearing, bearing friction and power loss, bearing life; Radial, thrust & axial loads; Static & dynamic load capacities; Selection of ball and roller bearings; lubrication and sealing.