Compound Bars:

In the case of thermal stress analysis in compound bars, the following points should be clearly understood and carefully applied:

(a) When the temperature of the compound bar is raised, each of its components tend to expand differently, depending on their α values.

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

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