Deformation of Graphite by Thermal Cycling

Abstract
The dimensional changes which occur when graphite specimens are thermally cycled under constant torque have been measured. It is shown that internal stresses due to the anisotropic thermal expansion of individual component crystallites cause strain increments to appear which are a function of the temperature change—not of the absolute temperature. A model used to describe the stress-strain relationships of graphite at constant temperature is extended to describe this new phenomenon in terms of a change in internal stress distribution with change in temperature.

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