Accession Number:

AD0609907

Title:

DETERMINATION OF FATIGUE CHARACTERISTICS OF A TYPICAL NOSE LANDING GEAR,

Descriptive Note:

Corporate Author:

NAVAL AIR ENGINEERING CENTER PHILADELPHIA PA AERONAUTICAL STRUCTURES LAB

Personal Author(s):

Report Date:

1964-12-21

Pagination or Media Count:

35.0

Abstract:

Twenty identical, unused nose landing gears were tested to determine the structural fatigue characteristics of these structures. Twelve specimens were tested under constant-amplitude loading and eight under spectrum loading. The constant-amplitude tests were cycled between a lower load level of zero and various upper load levels including a maximum value of 140 percent limit load. The spectrum tests were performed for three different spectra. For each spectrum the load was cycled from a lower load level of zero to the various upper load levels associated with each spectrum. Preliminary results from this and other investigations indicate that use of the Miner-Palmgren hypothesis results in conservative estimates of life compared to actual values obtained from spectrum tests at R0 and results in unconservative estimates when compared to actual values obtained from spectrum tests at R0. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE