Calculating the Durability and Fatigue of Mechanical Components

Mississauga, Ontario /
Mar 25 - 26, 2019 /
Course Code: 09-0323-2361

The confirmation of a course and venue depends on early registration; Register early to avoid the postponement or cancellation of a course.
  • Overview
  • Syllabus
  • Instructor
  • Location


After participating in this course, you will be able to:

  • Understand the fatigue damage mechanisms and the different characteristics of materials/alloys
  • Determine the parameters needed to calculate the fatigue life and select the most appropriate lifing method
  • Determine the low cycle fatigue or the high cycle fatigue life
  • Understand the characteristics of welded joint sand the methods to improve their fatigue life
  • Have a better understanding of the crack propagation lifing

When cyclic load is applied to a mechanical component, fatigue life has to be calculated to ensure the component meets the design objectives. It is important to understand the lifing methodology and consider all factors affecting the fatigue capability to calculate fatigue life accurately. Factors affecting fatigue strength are classified in two categories: intrinsic (related to the material) and extrinsic (related to component geometry and operating environment). This course is focused on fatigue damage mechanisms, the behaviour of different type of materials/alloys, lifing method, the parameters needed to calculate the fatigue life, and the characteristics of welded joints as well as an introduction to fracture mechanics.

Course Outline:

  • Fatigue damage mechanisms
  • Fatigue test
  • Material behaviours: steels, alloys
  • Methods to calculate fatigue life
  • Welded joints characteristics
  • Cumulative damage
  • Fatigue at high temperatures
  • Introduction to fracture mechanics
  • Case studies

Who Should Attend:

Mechanical and Structural Engineers • Consultants • Engineers in Training

More Information


Daily Schedule

8:00 Registration & Coffee (Day 1 only)
8:30 Seminar begins
12:00 Lunch (provided)
4:30 Adjournment

There is a one‐hour lunch break each day in addition to a refreshments and networking break each morning and afternoon. Lunch and refreshments are provided.

Day 1

Fatigue damage mechanisms

  • Introduction
  • Cyclic load
  • Fatigue damage mechanisms

Fatigue test

  • Endurance limit (for high number of cycles more 105, 106 cycles)
  • Low cycle fatigue (low number of cycles)

Material behaviours the characteristics of;

  • Steels
  • Nickel alloys
  • Aluminium alloys

Methods to calculate the fatigue life

  • Low cycle fatigue
    • Stress and strain based lifing methods
    • SN diagram (/, N)
    • Mean stress effect
    • Stress concentration factor
    • Parameters affecting the fatigue life; loading condition, stress concentration, surface finish, environment ...)

Case study

  • Estimating the fatigue life;
    • based on hand calculated stress (beam theories)
    • using the finite elements stress analysis results including; determining the stress concentration factor and the stress condition (compressive, tensile and multiaxial stress distribution)

Day 2

  • High cycle fatigue
      • Principal fatigue parameters
      • Goodman Jonson method
      • Other lifing methods including the ASM code for rotating shafts

Case study

  • Estimating the fatigue life using hand calculated stress
  • Estimating the life using the finite elements stress analysis results

Welded joints characteristics

  • Welded joints fatigue behaviours
  • Methods to improve the welded joint fatigue life

Cumulative damage

  • Miner rule
  • Rain Flow

Fatigue at high temperature

  • Environment effect
  • Creep fatigue interaction

Introduction to fracture mechanics

  • Basic of fracture mechanics
  • Fatigue crack propagation
    • Paris regime
    • Close to the critical stress intensity factor
  • Stress concentration zone and short crack propagation


Assaf Farah, Msc, Ph. D.

Assaf has more than 20 years of experience in manufacturing, design, structural analysis, creep, oxidation and fatigue lifing of mechanical components, including welded assembly, rotating and static parts.

He is a graduate in mechanical engineering from École de Technologie Supérieure (Montreal) in 2000 and in metallurgical engineering from Ecole Polytechnique de Montreal (method to improve the fatigue life of welded joints) in 2004. He has a Ph.D. in metallurgical engineering from Ecole Polytechnique de Montreal (fatigue of friction stir welding) and a master degree in engineering project management from Sherbrook University.


EPIC Learning Center
5670 McAdam Rd
Mississauga, ON L4Z 1T2

Other Venue InformationFor hotels close to EPIC/Special room rates, please email

We always want to improve the quality of our courses. Please select any reasons why you feel this course is inadequate (check all that apply).

Please check this box:
Course Rating
4.2 out of 5

Overall rating of this course by its previous attendees!

Fee & Credits
  • 1.4 Continuing Education Units (CEUs)
  • 14 Professional Development Hours (PDHs)

$1595 + taxes


On-Site Training
This course can be customized and delivered to your group of staff at your facility, saving time and money.
EPIC's email newsletter is a great source of information for:

  • course updates
  • surveys
  • informative articles/papers
  • exclusive discounts