Thermal Stress

Thermal stress, abbreviated as \( \sigma_t \) (Greek symbol sigma), is the change in the temperature of the material that causes expansion or contraction.  The change in length is porportional to the amount of heat applied.

 

thermal Stress formula
\(\large{ \sigma_t = \alpha \; E \; \Delta T   }\)
Symbol	English	Metric
\(\large{ \sigma_t }\)  (Greek symbol sigma) = thermal stress	\(\large{\frac{lbf}{in^2}}\)	\(\large{Pa}\)
\(\large{ E }\) = elastic modulus	\(\large{\frac{lbf}{in^2}}\)	\(\large{Pa}\)
\(\large{ \Delta T }\) = temperature differential	\(\large{F}\)	\(\large{C}\)
\(\large{ \alpha }\)  (Greek symbol alpha) = thermal expansion coefficient	\(\large{\frac{in}{in-F}}\)	\(\large{\frac{mm}{mm-C}}\)