Nondestructive Measurement of Bulk Residual Stresses.
Annual rept. Jul 82-Jul 83,
HOUSTON UNIV TEX DEPT OF MECHANICAL ENGINEERING
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The research on this contract was initiated in July 1982 in order to develop the method of the temperature dependence of ultrasonic velocity for the nondestructive evaluation of bulk residual stresses. Results previously obtained on aluminum, copper and steel have shown that this method offers a promising possibility for measurements of bulk stresses in these materials. The results also indicate that the method is less sensitive to variations caused by alloy composition and perhaps texture. Two objectives have been set for the research to be performed during the first year of this program. The first objective is to establish experimental relationships between the temperature dependence of ultrasonic velocity and stress applied in a direction parallel to and perpendicular to that of wave propagation. These relationships are to represent the variations of the temperature dependence when the stresses are applied in tension as well as in compression.
- Test Facilities, Equipment and Methods