Design of Machine Elements (ME30602), Autumn 2025

Mechanical Engineering Department, Indian Institute of Technology Kharagpur

This course website is meant specifically for the Section 3 students. Other section students are welcome to take a look, but MUST follow along with their respective section teachers.

Instructors:


Policies and Guidelines:

All policies and guidelines regarding the structure of the course and assessment are laid out in detail in the Policies and Guidelines tab.


Topics Tutorial Sheets

Introduction

Slides

  • What is a machine?
  • What are machine elements?
  • Design: 1-1
  • Mechanical Engineering Design: 1-2
  • Phases and Interactions of the Design Process: 1-3
  • Design Tools and Resources: 1-4
  • The Design Engineer’s Professional Responsibilities: 1-5
  • Standards and Codes: 1-6
  • Economics: 1-7
  • Safety and Product Liability: 1-8
  • Stress and Strength: 1-9
  • Uncertainty: 1-10
  • Design Factor and Factor of Safety: 1-11

Materials

Slides

  • Materials Selection: 2-21

Additionally, go through the slides of Prof. Mihir Sarangi (available on Moodle).

Very important source of knowledge will be your course “Materials Engineering (MT30001)”

 TS1

Static Failure Theories (2 weeks)

Slides

  • Static Strength: 5-1
  • Stress Concentration: 5-2
  • Failure Theories: 5-3
  • Maximum Shear Stress Theory for Ductile Materials: 5-4
  • Distortion Energy Theory for Ductile Materials: 5-5
  • Coulomb-Mohr Theory for Ductile Materials: 5-6
  • Failure of Ductile Materials Summary: 5-7
  • Maximum Normal Stress Theory for Brittle Materials: 5-8
  • Modifications of the Mohr Theory for Brittle Materials: 5-9
  • Failure of Brittle Materials Summary: 5-10
  • Selection of Failure Criteria: 5-11

Fatigue Failure (3 weeks)

Slides

  • Whole Chapter: 6-1 to 6-17

Shafts and Shaft Components (2.5 weeks)

  • Introduction: 7-1
  • Shaft Materials: 7-2
  • Shaft Layout: 7-3
  • Shaft Design for Stress: 7-4
  • Deflection Considerations: 7-5
  • Critical Speeds for Shafts: 7-6
  • Miscellaneous Shaft Components: 7-7
  • Limits and Fits: 7-8

Rolling-Contact Bearings (1.5 weeks)

  • Bearing Types: 11-1
  • Bearing Life: 11-2
  • Bearing Load Life at Rated Reliability: 11-3
  • Reliability versus Life - The Weibull Distribution: 11-4
  • Relating Load, Life, and Reliability: 11-5
  • Combined Radial and Thrust Loading: 11-6
  • Selection of Ball and Cylindrical Roller Bearings: 11-8

Lubrication and Journal Bearings (1.5 weeks)

  • Types of Lubrication: 12-1
  • Viscosity: 12-2
  • Petroff’s Equation: 12-3
  • Stable Lubrication: 12-4
  • Thick-Film Lubrication: 12-5
  • Hydrodynamic Theory: 12-6
  • Design Considerations: 12-7
  • The Relations of the Variables: 12-8
  • Steady-State Conditions in Self-Contained Bearings: 12-9
  • Clearance: 12-10

Gears (2 weeks)

  • Types of Gears: 13-1
  • Nomenclature: 13-2
  • Conjugate Action: 13-3
  • Involute Properties: 13-4
  • Fundamentals: 13-5
  • Contact Ratio: 13-6
  • Interference: 13-7
  • Tooth Systems: 13-12
  • Gear Trains: 13-13
  • Force Analysis - Spur Gearing: 13-14
  • Force Analysis - Helical Gearing: 13-16 (if time permits)
  • The Lewis Bending Equation: 14-1
  • Surface Durability: 14-2

Springs (1 week)

  • Stresses in Helical Springs: 10-1
  • The Curvature Effect: 10-2
  • Deflection of Helical Springs: 10-3
  • Compression Springs: 10-4
  • Stability: 10-5
  • Spring Materials: 10-6
  • Critical Frequency of Helical Springs: 10-8


Textbook