Accession Number:

ADA071762

Title:

Stress Analysis of a 100-Inch (CW-351) Plastic Polypropylene Dome.

Descriptive Note:

Technical memo.,

Corporate Author:

NAVY UNDERWATER SOUND LAB NEW LONDON CT

Personal Author(s):

• Borg,Matthew F.

Report Date:

1964-01-22

Pagination or Media Count:

22.0

Abstract:

The author concludes that under a 35 knot, 10 degree of yaw maneuver, very large bending stresses result at the dome flange connection to the skirt. These stresses are calculated to be on the order of 66,000 psi, far in excess of the strength of the polypropylene material. Under all other conditions of loading, the dome appears to be adequate for service. Creep or long time loadings have not been considered in the analyses. He recommends 1 The present design of the dome be rejected and 2 additional design studies be performed. Consideration should be given to use of a composite or sandwich structure up at the flange portion, as a means of providing additional strength. The effect on the sonar should, of course, be evaluated.

Descriptors:

• *POLYPROPYLENE
• *SONAR DOMES
• THICKNESS
• STRESS ANALYSIS
• PHYSICAL PROPERTIES
• BENDING STRESS

Subject Categories:

• Plastics
• Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE