Accession Number:

AD0271693

Title:

PREDICTION OF FAILURE DUE TO MECHANICAL DAMAGE IN THE OUTER HOOP WINDINGS IN FIBERGLASS PLASTIC PRESSURE VESSELS

Descriptive Note:

Interim rept.

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s):

Report Date:

1962-01-18

Pagination or Media Count:

7.0

Abstract:

A new method of estimating the effect of mechanical damage on the burst strength of glass-filament-wound plastic rocket cases has been developed. Only one type of failure was considered, namely unwinding and splitting of a strip in the outermost hoop-wound layers. This kind of event generally results in the loss of most of the layer, which contributes more than half of the wall strength. For the case of glass filaments in epoxy resin now in common use, a cut only 0.007 in. deep is predicted to be critical for a composite hoop stress of 80,000 psi. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE