M. Jafari - Department of Mechanical Engineering, Shahrood University of Technology, Shahrood, Iran.
M.B Nazari - Department of Mechanical Engineering, Shahrood University of Technology, Shahrood, Iran.

Plates have extensive applications in the production of various structures. Plates have important practical applications in designing new steam and gas turbines, jet and rocket engines, and muclear reactors Components of such such structures are subjected to thermal loading and this type type of loading causes temperature gradients and unequal thermal expansion of various components. if the non-uniform thermal expansion in an elastic material cannot proceed freely, thermal stresses are created. When the uniform heat flux is disturbed by the presence of an insulated hole, local intensification of the stress around the hole is caused. Determining the amount and location of these stresses in engineering design process is essential to achieve accurate design and to predict the service life and reliability of structures.