Abstract
This paper describes a theoretical model and related computational methods for examining the influence of inhomogeneous material properties on the crack driving force in elastic and elastic-plastic materials. Following the configurational forces approach, the crack tip shielding or anti-shielding due to smooth (e.g. graded layer) and discontinuous (e.g. bimaterial interface) distributions in material properties are derived. Computational post-processing methods are described to evaluate these inhomogeneity effects. The utility of the theoretical model and computational methods is demonstrated by examining a bimaterial interface perpendicular to a crack in elastic and elastic-plastic compact tension specimens.
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Simha, N.K., Fischer, F.D., Kolednik, O. et al. Crack Tip Shielding or Anti-shielding due to Smooth and Discontinuous Material Inhomogeneities. Int J Fract 135, 73–93 (2005). https://doi.org/10.1007/s10704-005-3944-5
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DOI: https://doi.org/10.1007/s10704-005-3944-5