Description

This course is designed to cover practical-analytical aspects of fatigue failure and fracture mechanics for engineering components and structures subjected to various cyclic loading conditions. Typical fatigue problems are analyzed and the method of solutions are discussed.

Topics covered include fundamental concepts of fracture mechanics and fatigue damage in materials, fatigue fracture analysis of cyclically loaded components, practical application, the stress intensity factor, fatigue and fracture data analysis, fatigue crack initiation and growth of engineering components subjected to the uniaxial and multiaxial fatigue loading conditions, fatigue damage theories, and cyclic plasticity and ratcheting response of materials.

Target audience

Engineers practicing in various disciplines including automobile, aerospace, pipeline and petroleum industries with a focus on stress analysis and failure of engineering components can benefit this short course.

Course Structure

Tuesday, 25 May 2021:

  • Overview of stress and strain states, and materials properties
  • Cyclic stress/ strain- fatigue life
  • The elements of elastic and plastic behaviour of materials
  • Linear Elastic Fracture Mechanics (LEFM)

Wednesday, 26 May 2021:

  • Crack tip plasticity, R curves, and Fracture toughness
  • Fatigue damage and cycle counting analyses
  • Stress concentration factor, stress raiser effect on fatigue life
  • Crack growth rate and fatigue life prediction

Thursday, 27 May 2021:

  • The effect of mean stress on fatigue life of engineering components
  • Fracture surface analysis
  • Fatigue damage theories and approaches
  • Cyclic plasticity and ratcheting theories

Presenter

Dr Ahmad Varvani is a professor at the Department of Mechanical Engineering at Ryerson University in Toronto, Canada. Over the past twenty-five years, he has been consistently investigating the fatigue and ratcheting response of engineering components and structures at various loading conditions. Varvani’s long term research outlook has been to assess fatigue damage under various complex loading conditions, to investigate ratcheting-fatigue interaction for load-bearing components and to predict overall damage of materials, to develop combined hardening rules, and to accommodate for viscoplastic ratcheting assessment of materials at various loading steps, sequences and rates, and to develop analytical solutions evaluating local ratcheting response and stress relaxation at the presence of stress raisers. Dr Varvani has supervised hundreds of students in the field, who are currently working as engineers in different industries. In addition, he has authored and co-authored over a hundred scientific articles published in refereed journals and international conference proceedings.