Development of a Next Generation High Cycle Fatique Test System

Period of Performance: 06/30/1995 - 06/30/1997

$746K

Phase 2 SBIR

Recipient Firm

Precision Magnetic Bearing Systems,
25 Walker Way Sec. 2A
Albany, NY 12205
Principal Investigator

Research Topics

Abstract

The Phase I effort aimed at establishing the feasibility of developing a High Cycle Fatigue Test System which can test aerospace materials at high frequencies that are beyond the capability of existing machined. To establish the feasibility, we evaluate several concepts and technologies and selected the magnetostrictive vibrator technology because it can deliver large dynamic forces with low inertia losses. We then constructed a subscale magnetostrictive technology demonstrator and conducted performance tests on it. The data from this technology demonstrator strongly suggested that it is possible to scale it up into a full scale Next Generation Fatigue Test System. The objective of this Phase II program is therefore to develop and deliver a fully operational Next Generation Fatigue Test System to the Air Force. The intent is to scale up the Phase I technology demonstrator into a fully operational HCF Test System. This system will be fully automated by enhancing an existing test automation software package. It will use mass-damping to minimize the load frame resonances. The system to be delivered will be capable of conducting mechanical testing at frequencies of up to 2,000 Hz. This increased frequency capability can lead to a 20-fold reduction in test duration and greatly reduces the cost of testing.