All Materials regarding to B.tech R-20 in Mechanical Engineering in 3rd Year 1st Semester with unit wise for Every Subjects are available.
👇👇Scroll Down for Important Questions and Topics Unit Wise 👇👇
| Mech 3-1 DMM 1 | ||
|---|---|---|
| S.No | Chapters / Units | Download Link |
| 1 | Unit 1 | Download |
| 2 | Unit 2 | Download |
| 3 | Unit 3 | Download |
| 4 | Unit 4 | Download |
| 5 | Unit 5 | Download |
Mech 3-1 DMM 1 Important Topics Questions
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- ASHBY Charts.
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-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.
Bolted joints – design of bolts with pre-stresses – design of joints under eccentric loading –
locking devices – both of uniform strength, different seals.
KEYS, COTTERS AND KNUCKLE JOINTS: Design of keys-stresses in keys-cotter
joints-spigot and socket-sleeve and cotter-jib and cotter joints- knuckle joints.
UNIT– IV:
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 COUPLING: Rigid couplings – muff, split muff and flange couplings, flexible
couplings – flange coupling (modified).
UNIT– V: DEPARTMENT OF MECHANICAL ENGINEERING
MECHANICAL SPRINGS:
Stresses and deflections of helical springs – extension -compression springs – springs for
fatigue loading, energy storage capacity – helical torsion springs – co-axial springs, leaf
springs.
Note: Design data book is NOT Permitted in the examination
TEXT BOOKS:
1. Machine design / NC Pandya & CS Shah/Charotar Publishing House Pvt. Limited
2. Machine Design/V.B.Bhandari/ McGraw-Hill Education
REFERENCES:
1. Design of Machine Elements / V.M. Faires/McMillan
2. Machine design / Schaum Series/McGraw-Hill Professional
3. Machine Design/ Shigley, J.E/McGraw Hill.
4. Design data handbook/ K.Mahadevan & K. Balaveera Reddy/ CBS publishers.
5. Machine Design –Norton/ Pearson publishers
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