Abstract
Conventional theories are In the conventional theories and calculations of thermal deformation of cylindrical piece in steady temperature field, thermal expansion coefficient, body form parameter and temperature are considered. They are approximate and linear, can only be applied in normal or low precision field. An equation for calculating thermal deformation of cylindrical piece in steady temperature field is deduced based on the linear relation between linear expansion coefficient and bulk expansion coefficient. Results of theoretical and experimental studies are presented, the experimental results also make it clear that the equation is more logical than the traditional method.
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