Question

Explain thermal stress and thermal strain in strength of materials

Answer 1

It is known that an object will contract or expand when the temperature changes. This contraction and expansion process can cause a thermal stress on an object if there is interference from contacting another part, or if the part is made out of different types of materials.
All translational direction (x, y, and z) can be effected by thermal stress during the expansion or contraction process. For this case I am only going to talk about one direction where the resulting forces are normal to the central axis, resulting in axial loads.
To solve a problem like this, first you must realize that all axial loaded problems caused by thermal expansion are statically indeterminate. The best method to solve this problem would be to take in consideration the expansion that would happen due to the change in temperature

Answer 2

Answer:

Stress which is induced in a body due to change in the temperature is known as thermal stress and the corresponding strain is called thermal strain. Thermal stress induces in a body when the temperature of the body is raised or lowered and the body is not allowed to expand or contract freely.