Accession Number : AD1017448


Title :   High-Frequency Axial Fatigue Test Procedures for Spectrum Loading


Descriptive Note : Technical Report


Corporate Author : NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD PATUXENT RIVER United States


Personal Author(s) : Rusk, David T ; Taylor,Robert E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1017448.pdf


Report Date : 20 Jul 2016


Pagination or Media Count : 31


Abstract : This Memorandum documents the procedures for conducting an axial fatigue test under variable amplitude (spectrum) loading conditions using an MTS 810 High-Frequency Test frame. Load-controlled fatigue testing under repeating block, variable amplitude loading histories can be performed at frequencies much higher than standard servo-hydraulic test frames by using a test frame that is optimized to run at higher frequencies. AIR 4.3 has conducted a research program to develop a test capability for performing such tests, using an existing MTS 810 test frame operated in servo-hydraulic mode. The test frame configuration was modified to maximize controller response during variable amplitude loading, and a closed-loop digital test frame controller with a command feedback compensation scheme was used to minimize controller error during testing.


Descriptors :   fatigue tests (mechanics) , frequency , aircrafts , Axial loads , FATIGUE CRACKING


Subject Categories : Mechanics
      Military Aircraft Operations


Distribution Statement : APPROVED FOR PUBLIC RELEASE