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Fundamentals of thermo-mechanical & fatigue analysis of welded structure

Prof. Pankaj Biswas · IIT Guwahati

Start with lecture 1 At NPTEL

Lectures

Week 1: Basics of Welding Thermal Analysis

  1. Lec 1: Weld Induced Thermal History (Basics of Heat Flow in Welding) Video
  2. Lec 2: Weld Induced Thermal History (Basics of Heat Flow in Welding) Video
  3. Lec 3: Weld Induced Thermal History (Basics of Heat Flow in Welding) Video
  4. Lec 4: Weld Induced Thermal History (Basics of Heat Flow in Welding) Video
  5. Lec 5: Weld Induced Thermal History (2D-3D Heat Flow & Cooling Rate) Video
  6. Lec 6: Weld Induced Thermal History (2D-3D Heat Flow & Cooling Rate) Video

Week 2: Welding Heat Source and Common Heat Treatment Processes

  1. Lec 7: Common Heat Treatment Processes (Types, Preheating, Inter-pass Temperature, PWHT) Video
  2. Lec 8: Common Heat Treatment Processes (Types, Preheating, Inter-pass Temperature, PWHT) Video
  3. Lec 9: Common Heat Treat Treatment Processes (PWHT) Video
  4. Lec 10: Common Heat Treat Treatment Processes (PWHT) Video
  5. Lec 11: Fundamental of Different Types of Welding Heat Sources Video
  6. Lec 12: Fundamental of Different Types of Welding Heat Sources Video

Week 3: Various Welding Heat Sources and Weld Design Subjected to Different Types of Loading Conditions

  1. Lec 13: Fundamental of Different Types of Welding Heat Source Video
  2. Lec 14: Fundamental of Different Types of Welding Heat Sources Video
  3. Lec 15: Designing of Welded Joints Subjected to Combined Loads Video
  4. Lec 16: Designing of Welded Joints Subjected to Combined Loads Video

Week 4: Design of Welded Structure Subjected to Combined Loading

  1. Lec 17: Design of Welds Subjected to Combined Stresses Video
  2. Lec 18: Design of Welds Subjected to Combined Stresses Video
  3. Lec 19: Design of Welds Subjected to Combined Stresses Video
  4. Lec 20: Design of Welds Subjected to Combined Stresses Video

Week 5: Basics of Creep and Fatigue Analysis

  1. Lec 21: Fundamental of Creep on Welded Joints Video
  2. Lec 22: Fundamental of Creep on Welded Joints Video
  3. Lec 23: Basics of Fatigue Analysis Video
  4. Lec 24: Basics of Fatigue Analysis Video

Week 6: Basics of Fatigue Design and Marin Equation

  1. Lec 25: Basics of Fatigue Life Prediction Video
  2. Lec 26: Basics of Fatigue Life Prediction Video
  3. Lec 27: Some Problems on Fatigue Life Prediction of Welded Joints Video
  4. Lec 28: Some Problems on Fatigue Life Prediction of Welded Joints Video

Week 7: Fatigue Analysis, Design and Life Estimation Procedures

  1. Lec 29: Fatigue Analysis, Design and Life Estimation Procedures Video
  2. Lec 30: Fatigue Analysis, Design and Life Estimation Procedures Video
  3. Lec 31: Examples of Fatigue Design Methods Video
  4. Lec 32: Examples of Fatigue Design Methods Video

Week 8: Rainflow Counting Method, Cumulative Fatigue Damage and Palmgren-Miner's Rule

  1. Lec 33: Rainflow Counting Method Video
  2. Lec 34: Rainflow Counting Method Video
  3. Lec 35: Cumulative Fatigue Damage and Palmgren-Miner's Rule Video
  4. Lec 36: Cumulative Fatigue Damage and Palmgren-Miner's Rule Video

Week 9: Fatigue Design and Analysis due to Fluctuating Stresses and Fatigue Failure Criteria

  1. Lec 37: Fatigue Design and Analysis due to Fluctuating Stresses and Fatigue Failure Criteria Video
  2. Lec 38: Fatigue Design and Analysis due to Fluctuating Stresses and Fatigue Failure Criteria Video
  3. Lec 39: Modified Goodman Diagrams and Examples Video
  4. Lec 40: Modified Goodman Diagrams and Examples Video

Week 10: Modified Goodman Diagrams, Basquins's & Coffin's Law of Fatigue

  1. Lec 41: Modified Goodman Diagrams for Fluctuating Torsional Shear Stresses and Examples Video
  2. Lec 42: Modified Goodman Diagrams for Fluctuating Torsional Shear Stresses and Examples Video
  3. Lec 43: Basquin's & Coffin's Law of Fatigue and Mean Stress Corrections in Fatigue Video
  4. Lec 44: Basquin's & Coffin's Law of Fatigue and Mean Stress Corrections in Fatigue Video

Week 11: Basquin's Law and Linear Elastic Fracture Mechanics (LEFM) Approach

  1. Lec 45: Example of Basquin's Law of Fatigue and Linear Elastic FractureMechanics Approach Video
  2. Lec 46: Example of Basquin's Law of Fatigue and Linear Elastic FractureMechanics Approach Video
  3. Lec 47: Linear Elastic Fracture Mechanics Approach(Paris-Erdogan's Law) Video
  4. Lec 48: Linear Elastic Fracture Mechanics Approach(Paris-Erdogan's Law) Video

Week 12: Weld Fatigue Life Estimation by Nominal Stress Method & Hot Spot Stress Approach

  1. Lec 49: Weld Fatigue Life Estimation Procedures (Nominal Stress Method) Video
  2. Lec 50: Weld Fatigue Life Estimation Procedures (Nominal Stress Method) Video
  3. Lec 51: Weld Fatigue Life Estimation Procedures (Nominal Stress Method) Video
  4. Lec 52: Weld Fatigue Life Estimation Procedures (Nominal Stress Method) Video
  5. Lec 53: Hot Spot Stress Approach Video
  6. Lec 54: Hot Spot Stress Approach Video

Live Session

  1. Live Session 14-02-2025 Video
  2. Live Session 07-03-2025 Video
  3. Live Session 20-03-2025 Video

Syllabus and materials

At NPTEL, as the course publishes them.

Credits and licence

Institution
IIT Guwahati
Department
Mechanical Engineering
Teacher
Prof. Pankaj Biswas
Level
Undergraduate
Language
English
Subjects
Engineering
Source
NPTEL
Licence
CC BY-NC-SA, as NPTEL states it. Non-commercial use only. NPTEL's terms
Attribution
NPTEL states: "Distributed under Creative Commons Attribution-ShareAlike / CC BY - NC - SA", beside a BY-NC-SA badge.
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