2.1 THERMAL STRESS AND COMPOSITE BAR

2.4  HEAT STRESS

When the temperature of a material change, then the material was changed. Development of materials will occur if the temperature rises, while contraction occurs if the temperature is down. An expansion of the material shrinkage due to temperature @ is proportional to the original length and temperature change itself.          d_t µL_o Dt

... But the expansion is blocked, then the extension is supposed to happen has been detained by the force of the wall. Therefore, we say these forces have arrested elongation wall materials:

... Finally, note that the initial length is equal to the length of the end. Therefore the extension and expansion did not bring any change in shape.

... And note that the stresses inherent in the material either compression or tension is equal to the force per surface area materials.