Abstract
In this paper, the hybrid method is employed to calculate full-field stress field in uni-axially loaded finite width tensile plate. At first, the isochromatic data of given points are calculated by finite element method and are used as input data of complex variable formulations. Then the numerical model of specimen is transformed from the physical plane to the complex plane by conformal mappings. The stress field is analyzed on this complex plane. In order to accurately compare calculated fringes with experimental ones, both actual and regenerated fringe patterns are processed to be doubled and sharpened by digital image program. Regenerated fringes by hybrid method are quite comparable to actual fringes. The experimental results indicate that Mode I stress intensity factor analyzed by the hybrid method are accurate within three percent compared with ones obtained by empirical equation and finite element analysis.
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