Design of machine elements-I



Introduction –Concept of Design, Types of design, general considerations and standards of design, design procedure, selection of engineering materials, properties, manufacturing considerations in the design, BIS codes of materials, preferred numbers.
Stress in Machine Members: simple stresses, torsional and bending stresses, combined stresses, impact stresses, stress-strain relation, Failure from static loading, types of failure from static loading, Modes of failures, factor of safety

Design for Fatigue Loads-Variable (fatigue) stresses, stress concentration, notch sensitivity,and design for fluctuating stresses fatigue failure, endurance limit, estimation of endurance strength, Goodman’s line, Soderberg’s line and Gerber’s line, Modified Goodman’s Line design of components for finite and infinite life.

Design of Mechanical (Bolted and Riveted) Joints– Forms of Screw threads, Stresses in Screw fasteners, Design of bolts with pre-stresses, Design of bolted joints under eccentric loading, Bolts of uniform strength. Types of riveted heads, riveted joints, types of failure, efficiency of joint, eccentric loading, design of riveted joints.
Design of Welded Joints-Introduction, Advantages and Disadvantages of Welded Joints over Riveted Joints, Axially Loaded Unsymmetrical Welded Sections, Eccentrically Loaded Welded Joints.

Design of Mechanical (Cotters and Knuckle) Joints– Spigot and socket, sleeve and cotter, jib and cotter joints, Knuckle joint
Design of Shafts– Shaft design on the basis of strength, torsional rigidity and lateral rigidity, ASME, code for shaft design.

Design of Keys– Sunk, saddle, round, woodruff, splines, keyways.
Design of Couplings– Design of rigid couplings- sleeve or muff, split-muff or compression and flange couplings, design of flexible couplings- bushed pin type flange coupling.

Materials for Design of machine elemnts-I :

Unit1: will be updated soon

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