Failure Analysis of Gearless Safety and Arming Device,
Abstract
A malfunction has been observed in the time delay arming system for the device investigated at spin speeds above 13,000 rpm. A quasi static and dynamic analysis of the system was made to determine the cause and measures for correction. The primary cause of failure was determined to be low cycle fatigue of the mating surfaces of the rotor and balance caused by the high bearing pressures at the point of contact. The recommendation for correction is to decrease the bearing pressure by decreasing the inertia (i.e., mass) of the rotor and balance. A mathematical analysis for rationally predicting life is included. Alternative approaches and the problem of 'run-in' are also discussed. A stress analysis of the rotor teeth is provided. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1973
- Accession Number
- AD0780014
Entities
People
- M. Jerry Kenig
Organizations
- Frankford Arsenal