Mechanical Engineering ETDs

Publication Date



Existing theory was used to determine the thermal stresses and strains throughout a long thick walled cylinder under equilibrium thermal conditions when the thermal gra­dient through the wall is dependent on radial position only.

A thick walled cylindrical model, made of a plastic material, was constructed and strain gages were imbedded in and mounted on the cylinder to determine strains at interior and surface locations. The cylinder was subjected to equi­librium and transient thermal conditions and thermal strains were measured. In the equilibrium thermal condition the measured strains were compared with those predicted by theory.

The results show that imbedded strain gages can be used to determine thermal strains at interior points. They also show that thermal stresses resulting from transient thermal conditions can be substantially higher than those that would be predicted on the basis of equilibrium thermal conditions.

Similitude theory was used to determine the relation­ship that exists for the prediction of the thermal stresses in a prototype from measurements on a plastic model. The results show that the resulting v terms do not require any relationship between model and prototype that are insur­mountable in the practical sense.

Degree Name

Mechanical Engineering

Level of Degree


Department Name

Mechanical Engineering

First Committee Member (Chair)

Richard Charles Dove

Second Committee Member

Victor J. Skoglund

Third Committee Member

Charles Theron Grace

Document Type