Accession Number:

ADA071029

Title:

Hypervelocity Wind Tunnel Components Structural Evaluation. Volume 1.

Descriptive Note:

Final rept.,

Corporate Author:

O'DONNELL AND ASSOCIATES INC PITTSBURGH PA

Personal Author(s):

Report Date:

1979-05-01

Pagination or Media Count:

153.0

Abstract:

A structural evaluation of the large threaded Pressure Vessels in the wind tunnel facility was performed using finite element techniques coupled with fatique and fracture mechanics analyses of the critical locations. The results of this evaluation show that these threaded pressure vessels have limited fatigue life due to high stress concentrations at the root of the thread root radii in the threaded end closures. Design modifications were made to the most critical end closures Bottom End of Mach 1418 Heater Vessel and Inlet End of Driver Vessel to increase the design life of these pressure vessels. The design life of all of the threaded pressure vessels was also increased by reducing the maximum pressure at which they are operated. Periodic inspection requirements which account for variable pressure cycling and mean stress effects were also developed for the critical areas of these threaded pressure vessels. The net result of the design modifications, reduced operating pressures and periodic inspection requirements is to increase the design life and confidence in the safety related structural integrity of the threaded pressure vessels in the wind tunnel facility. Author

Subject Categories:

  • Hydraulic and Pneumatic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE