Mech. Engg. Design & Graphics | Department of Mechanical Engineering

Mech. Engg. Design & Graphics

Unit 1 Fundamentals of Design:-
Introduction & Definitions, general procedure of Machine Design, System Design Cycle, Strength and Stiffness Design, Standards in Design, Selection Of Preferred sizes, selection of material, designation of Cast iron, steel and alloy steel
Unit 2 Design against static and fluctuating loads
Modes of failure, Factor of safety, Principal stresses, Stresses due to bending and torsion, Theory of failure, Cyclic stresses, Fatigue and endurance limit, Stress concentration factor, Stress concentration factor for various machine parts, Notch sensitivity, Design for finite and infinite life, Soderberg, Goodman criteria
Unit 3 Design of Joints
Design of Cotter and Knuckle joint, Riveting methods, materials, Types of rivet heads, Types of riveted joints, Caulking and Fullering, Failure of riveted joint, Efficiency of riveted joint, Eccentric loaded riveted joint, Design of butt and fillet weld joints, welded joints subjected to eccentric, bending and torsional loading, Terminology of threaded joint, Analysis of Bolted joints, terminology of screw, Eccentrically loaded bolted joints.
Unit 4 Power Screws & mechanical Spring
Introduction, advantages & applications, Forms of threads, multiple threads, Efficiency of square threads, Trapezoidal threads, Stresses in screws, Design of screw jack. Terminology in spring, Material for helical springs, End connections for compression and tension helical springs, Stresses and deflection of helical springs of circular wire, Design of helical springs subjected to static and fatigue loading

Unit 5 Shaft & Keys Shaft:
Cause of failure in shafts, Materials for shaft, Stresses in shafts, Design of shafts Subjected to twisting moment, bending moment and combined twisting and bending moments, ASME code for Shaft Design. Keys: Types of keys, splines, Selection of square & flat keys, Strength of sunk key, Design of couplings- muff and rigid flange couplings

Unit 6 Gears and Bearings
Gears: Introduction, Classifications, Selection of gear, law of gearing, Terminology, manufacturing, interference, backlash, Force analysis, Design the cross-section of arm, hunting tooth, beam strength for Gear tooth: Lewis Equation, Wear strength of gear tooth. Bearings: Classifications, Petroff’s Equation, Plain journal bearing, Hydrodynamic lubrication, Properties and materials, Lubricants and lubrication, Hydrodynamic journal bearing, Selection of Rolling Contact bearings, Stribeck’s Equation, Dynamic Load carrying Capacity.

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