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JNTUH DMM-1
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DIGITAL NOTESMACHINE DESIGN I
R18A0314
B.Tech –IIIYear – I Semester
DEPARTMENT OF MECHANICAL ENGINEERING
MALLA REDDY COLLEGE OF
ENGINEERING & TECHNOLOGY
(An Autonomous Institution – UGC, Govt.of India)
Recognizes under 2(f) and 12(B) of UGC ACT 1956
(Affiliated to JNTUH, Hyderabad, Approved by AICTE –Accredited by NBA & NAAC-“A” Grade-ISO 9001:2015
Certified)
MACHINE DESIGN I
i
, MALLAREDDY COLLEGE OF ENGINEERING AND TECHNOLOGY
III Year B. Tech MECH-I Sem L T/P/D C
4 1 4
(R18A0314) MACHINE DESIGN I
OBJECTIVES
To apply the general design procedures and principles in the design of machine
elements.
To apply different materials of construction and their properties and factors
determining the selection of material for various applications.
To evaluate stresses under different loading conditions.
To apply the design procedure of different fasteners, joints, shafts and couplings.
UNIT – I
INTRODUCTION: General considerations in the design of Engineering Materials and their
properties – selection – Manufacturing consideration in design.BIS codes of steels.
DESIGN FOR STATIC STRENGTH: 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.
UNIT – II
DESIGN FOR FATIGUE STRENGTH : Stress concentration – Theoretical stress Concentration
factor – Fatigue stress concentration factor- Notch Sensitivity – Design for fluctuating stresses
– Endurance limit – Estimation of Endurance strength – Gerber’s curve, Goodman’s line –
Modified Goodman’s line – Soderberg’s line.
UNIT – III
RIVETED, WELDED AND BOLTED JOINTS:
Riveted joints- Methods of failure of riveted joints-strength equations-efficiency of riveted
joints-eccentrically loaded riveted joints.
Welded joints -Design of fillet welds-axial loads-circular fillet welds under bending, torsion.
Welded joints under eccentric loading.
Bolted joints – Design of bolts with pre-stresses – Design of joints under eccentric loading –
locking devices – bolts of uniform strength.
UNIT – IV
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.
ii
,UNIT – V
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).
SHAFT COUPLINGS : Rigid couplings – Muff, Split muff and Flange couplings. Flexible
couplings – Flange coupling (Modified).
TEXT BOOKS:
1. Machine Design by R.S.Khurmi and J.K.Gupta, S.Chand Publishers,New Delhi.
2. Machine Design, S MD Jalaludin, Anuradha Publishers.
3. Design of Machine Elements by V. Bhandari TMH
REFERENCE BOOKS:
1. Machine Design Data Book by S MD Jalaludin, Anuradha Publishers
2. Machine Design Data Book by P.S.G. College of Technology
3. Machine Design by Pandya and Shah, Chortar Publications.
4. Machine Design / R.N. Norton
5. Mechanical Engineering Design / JE Shigley.
OUTCOMES:
The student acquires the knowledge about the principles of design, material selection,
component behavior subjected to loads, and criteria of failure.
Understands the concepts of principal stresses, stress concentration in machine
members and fatigue loading.
Design on the basis of strength and rigidity and analyze the stresses and strains
induced in a machine element.
iii
, CONTENTS
UNIT NO NAME OF THE UNIT PAGE NO
I 1 - 46
DESIGN FOR STATIC STRENGTH
II 47 - 69
DESIGN FOR FATIGUE STRENGTH
III 70 - 149
RIVETED, WELDED AND BOLTED JOINTS
IV KEYS, COTTERS AND KNUCKLE JOINTS 150 - 177
V 178 - 231
SHAFTS & COUPLINGS
iv
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