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):

Report Date:

2016-07-20

Pagination or Media Count:

31.0

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.

Subject Categories:

  • Mechanics
  • Military Aircraft Operations

Distribution Statement:

APPROVED FOR PUBLIC RELEASE