Abstract
Stress intensity factors around two parallel cracks in an infinite orthotropic plate have been determined. Uniform heat flows normally to the cracks. Thermal insulation is assumed on the surfaces of the cracks. The mixed boundary value conditions are reduced to dual integral equations using the Fourier transform technique. In order to solve the equations, the temperatures and displacements at the two cracks are expanded in a series of functions that are zero outside the cracks. The unknown coefficients in each series are solved by the Schmidt method. The stress intensity factors are calculated numerically for steel and ceramic-fiber-reinforced ceramics.
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