Abstract
In this paper, the theoretical solution developed by Vaughan and Wu for the stress analysis of a circular disk with a radial edge crack extending to its center is validated by photoelasticity. The photoelastic results include the fullfield isochromatics as well as measurements of the maximum shear stress at a number of test points. Additionally, the experimental stress intensity factor is extracted from the photoelastic data by Irwin's two-parameter method. Good agreement is observed when the theoretical stress field and stress intensity factor are compared with the experimental results. It is concluded that the Vaughan-Wu solution can be confidently applied in fracture mechanics analyses. The application of such a solution to the stress analysis of two-dimensional bodies with complex geometries subjected to complex loading is also noted.
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