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2007-08
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY,
HYDERABAD
III Year B.Tech MP I-Sem T P C
4+1* 0 4
DESIGN OF MACHINE MEMBERS - I
UNIT – I
INTRODUCTION : General considerations in the design of Engineering Materials and their properties –
selection –Manufacturing consideration in design. Tolerances and fits –BIS codes of steels.
STRESSES IN MACHINE MEMBERS : Simple stresses – Combined stresses – Torsional and bending
stresses – impact stresses – stress strain relation – Various theories of failure – factor of safety – Design
for strength and rigidity – preferred numbers. The concept of stiffness in tension, bending, torsion and
combined situations – Static strength design based on fracture toughness.
UNIT – II
STRENGTH OF MACHINE ELEMENTS : Stress concentration – Theoretical stress Concentration
factor – Fatigue stress concentration factor notch sensitivity – Design for fluctuating stresses – Endurance
limit – Estimation of Endurance strength – Goodman’s line – Soderberg’s line – Modified goodman’s line.
UNIT – III
Riveted and welded joints – Design of joints with initial stresses – eccentric loading
UNIT – IV
Bolted joints – Design of bolts with pre-stresses – Design of joints under eccentric loading – locking devices
– both of uniform strength, different seals
UNIT – V
KEYS, COTTERS AND KNUCKLE JOINTS :
Design of Keys-stresses in keys-cottered joints-spigot and socket, sleeve and cotter, jib and cotter joints-
Knuckle joints.
UNIT – VI
SHAFTS : Design of solid and hollow shafts for strength and rigidity – Design of shafts for combined
bending and axial loads – Shaft sizes – BIS code. Use of internal and external circlips, Gaskets and seals
(stationary & rotary).
UNIT – VII
SHAFT COUPLING : Rigid couplings – Muff, Split muff and Flange couplings. Flexible couplings –
Flange coupling (Modified).
UNIT – VIII
Mechanical Springs :
Stresses and deflections of helical springs – Extension -compression springs – Springs for fatigue loading
– natural frequency of helical springs – Energy storage capacity – helical torsion springs – Co-axial springs,
leaf springs.
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| Author: India 20 Dec 2007 | Member Level: Diamond Points : 1 |
TEXT BOOKS :
1. Machine Design, V.Bandari TMH Publishers
2. Machine Design, S MD Jalaludin, AnuRadha Publishers
3. Design Data hand Book, S MD Jalaludin, AnuRadha Publishers
REFERENCES :
1. Design of Machine Elements / V.M. Faires
2. Machine design / Schaum Series.
3. Machine design – Pandya & shah.
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