Accession Number:

AD0416148

Title:

THE EFFECT OF TRANSIENT CREEP ON THE COLLAPSE TIME OF CYLINDERS AND CONES UNDER EXTERNAL PRESSURE.

Descriptive Note:

Final technical rept. 22 Jan 62-15 Mar 63,

Corporate Author:

SOUTHWEST RESEARCH INST SAN ANTONIO TX

Personal Author(s):

Report Date:

1963-08-01

Pagination or Media Count:

27.0

Abstract:

Previous attempts to compute the collapse time for cylinders under external pressure at elevated temperatures had used the assumption of steady state creep. In many cases the computed collapse times were larger than those indicated by tests. In this work similar computations were made of the collapse time but including the effect of the transient creep which precedes the onset of the steady state. The inclusion of the transient creep had the effect of reducing the time to col lapse in many cases. Comparison of the predicted times with published experimental times for cyl inders and cones under various conditions showed that the probable error in prediction was reduced in all cases by the inclusion of transient creep. The most accurate predictions were obtained for the cylinders with fixed ends, for which the collapse time could be determined with a probable error of 28. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE