Evaluation Of Fracture Parameters For Functionally Gradient Materials
Author(s)
J. Sladek, V. Sladek & M. Hrina
Abstract
Evaluation of fracture parameters for
functionally gradient materials
J. Sladek, V. Sladek & M. Hrina
Institute of Construction and Architecture, Slovak Academy of Sciences,
842 20 Bratislava, Slovakia
Abstract
Efficient numerical methods are presented to compute fracture parameters (stress
intensity factor and T-term stress) for a cracked composite material body
subjected to a stationary thermal load. The path independent integral
representations for stress intensity factors and T-term stress in functionally
gradient materials are derived. The thermomechanical fields along the
integration path and in the enclosed domain are obtained by the boundary
element method. The method is appropriate for computation of fracture
parameters because the contour integral is evaluated over the path, which is far
away from the crack tip. Numerical results are given for a thick-walled tube with
edge cracks on the internal surface.
1 Introduction
Cracking of structur
Keywords
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