Abstract
In present work, thermal stress distribution of a structure made of dissimilar metals is studied and analyzed using digital holographic non-destructive testing (DHNDT) method. The test structure is a press fit assembly in which a circular disk of Aluminium is tightly fitted inside a ring of mild steel material. Digital holograms of the metal structure under test are recorded in its thermally loaded and unloaded states. Amplitude and phase distribution of thermal deformation resulted from temperature gradient and different coefficient of thermal expansion (CTE) of metals, are analyzed. Thermal stress distribution generated due to thermal deformation along the surface of metal structure is also discussed. These results could be utilized in analysing thermal stress distribution in several manufacturing applications like aviation and automobile industries where these types of metal and non-metal structures are common.
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