The Use of Fracture Mechanics for Fatigue Life Assessment
Ramesh Chandwani, Zentech International Ltd.
NAFEMS UK Seminar: Current Best Practices in Fatigue Analysis using FEA, London, UK, 16 September 2014
Abstract:
Fatigue failure is a complex physical process, encompassing both crack
initiation and crack propagation phases. Using fracture mechanics,
fatigue crack growth can be characterised and residual fatigue life
evaluated. In the case of a failure, the cause of fracture can be
determined forensically. Indeed, fracture mechanics, In conjunction with
finite element analysis techniques, has become a very powerful tool for
the assessment of the safety and durability of new and legacy based
infrastructure projects, the failure of which could have enormous
economical and loss of human life consequences.
This paper highlights some of the techniques available and
demonstrates their application to a range of fatigue life assessments.