Dr Ahmad Varvani-Farahani from Ryerson University, Canada presented a three-day online course on Fatigue Fracture Analysis to a group of participants from Canada, Singapore, the United Kingdom and the United States.

This course was 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 were analysed and the method of solutions was discussed.

The course was targeted towards engineers practicing in various disciplines including automobile, aerospace, pipeline and petroleum industries with a focus on stress analysis and failure of engineering components, but also proved useful for university students and professors.


Course Programme

The topics covered included:

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


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.


For further information and details of the next event please contact:

Jane Chantler
Wessex Institute
Ashurst Lodge, Ashurst
Southampton, SO40 7AA
Tel: 44 (0) 238 029 3223
Fax: 44 (0) 238 029 2853
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