Design of Machine Elements 2
Definition: Design of Machine Elements 2 advances design principles for gears, bearings, belts, chains, and power transmission components.
Available PYQs:
2018
2022
2024
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Detailed Syllabus
Unit 1: Variable Loading
- Different types of fluctuating / variable stresses
- Fatigue strength considering stress concentration factor
- surface factor, size factor, reliability factor etc.
- Fatigue design for finite and infinite life against combined variable stresses using Goodman and Soderberg’s Criterion
- Fatigue design using Miner’s equation
Unit 2: Design of Screws and Fasteners
- Thread standards and definition
- mechanics of power screws
- threaded fasteners
- fastener stiffness
- Studs
- Design of Screw Jack
Unit 3: Design of Bearings
- Selection of ball and roller bearing based on static and dynamic load carrying capacity using load-life relationship
- Selection of Bearings from manufacturer’s catalogue
- types of lubrication – Boundary, mixed and hydrodynamic lubrication
- Design of journal bearings using Raimondi and Boyd’s Charts
- Lubricants and their properties
- Selection of suitable lubricants
Unit 4: Gears
- Classification
- Selection of gears
- Terminology of gears
- Force analysis
- Selection of material for gears
- Beam & wear strength of gear tooth
- Form or Lewis factor for gear tooth
- Dynamic load on gear teeth
- Barth equation and Buckingham equation and their comparison
- Design of spur, helical, bevel & worm gear including the Consideration for maximum power transmitting capacity
- Gear Lubrication
Unit 5: Design of Flywheels
- Turning moment diagram
- coefficient of fluctuation of energy and speed
- design of solid and rimmed flywheel
Unit 6: Design of Miscellaneous Components
- C-clamp
- Piston
- Crank Shaft and Connecting Rods