K-dominant region in 2-D functionally graded materials under mixed mode loading
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Abstract
The extent of K-dominant region around the crack tip of a functionally gradedplate under mixed mode loading is investigated. A center cracked plate is used for thestudy. The stress intensity factors and T-stresses are calculated using mode extractionand J-integral method. Stress fields near the crack tip are calculated by using finiteelements and the results are compared to two different asymptotic stress field resultsavailable in literature. Deviations of the asymptotic solutions from finite element so-lutions are shown in terms of contour plots around the crack tip to show the extent ofK-dominant region. Effects of the material nonhomogeneity, crack size and crack angleon the extent of K-dominant region are examined. Stress contours and error contoursare plotted.
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