Compound Bars:

In the case of thermal stress analysis in compound bars, the following points must be apparently understood & carefully applied:

(a) While the temperature of the compound bar is go up, each of its components tend to expand differently, based on their α values.

(b) How much to the thermal expansion in each of component is decided depend on compatibility conditions.

(c) While once the deformation to be suppressed in the case of each of component is known, the stress induced might be calculated for each bar according to its E value.