Evaluation of T-stress in stationary and propagating adiabatic cracks in FGM subjected to thermo-mechanical loading
Hamid Bayesteh, Haider Khazal, Soheil Mohammadi
Abstract
The aim of this paper is to study the T-stress and its effect on crack propagation in FGM materials with adiabatic cracks subjected to thermo-mechanical loading based on the J-integral formulation and the extended finite element method (XFEM). Path-independent J-integral responses of T-stress for adiabatic cracks and the effects of incompatible terms for FGMs are discussed. Having examined the T-stress parameter, the effect of fracture characteristic/process length on crack propagation angle in adiabatic cracks is studied. The results show that the initial crack propagation angle deviates from the standard propagation angle by increasing the size of the fracture process zone.
Topics & Concepts
Adiabatic processMaterials scienceFracture mechanicsStress (linguistics)Fracture (geology)Finite element methodMechanicsComposite materialStructural engineeringPhysicsThermodynamicsEngineeringLinguisticsPhilosophyNumerical methods in engineeringFatigue and fracture mechanicsMechanical stress and fatigue analysis