Magnetostrictive, mass isolated, non-resonant, high frequency/lo

Details Magnetostrictive, mass isolated, non-resonant, high frequency/lo Magnetostrictive, mass isolated, non-resonant, high frequency/lo

1996-11-26

1998-02-17

Dougherty, Elizabeth L.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

73855, G01N 332

Patent

active

057193398

ABSTRACT:
A mechanical test system is provided comprising a primary actuator arranged so as to create mechanical movement of a first specimen holder along an axis of actuation and an oppositely oriented secondary actuator arranged so as to create mechanical movement of a second specimen holder along the axis of actuation. The magnetostrictive actuator comprises a magnetostrictive assembly including a magnetostrictive element and a flexible disk mechanically coupled to the magnetostrictive element. The magnetostrictive element comprises either a magnetostrictive material portion with a plurality of cooling fluid bores formed within the magnetostrictive material portion or an epoxy matrix with a plurality of cooling fluid bores and a plurality of magnetostrictive rods formed within the epoxy matrix.

REFERENCES:
patent: 3994158 (1976-11-01), Weinhold
patent: 4246793 (1981-01-01), Fairand et al.
patent: 4308474 (1981-12-01), Savage et al.
patent: 5195377 (1993-03-01), Garshelis
patent: 5280725 (1994-01-01), Stengel
patent: 5425276 (1995-06-01), Gram et al.
Brochure: Machine Design, A Penton Publication, Mar. 21, 1991.
Brochure: Etrema Terfenol-D, Etrema Products, Inc.
Brochure: Profiles in Aerospace, 1993 Etrema Products, Inc.
Brochure: Etrema Terfenol-D.RTM.Magnetostrictive Actuators, Etrema Products, Inc.
Brochure: Now Imagine the Possibilities|, Etrema Products, Inc.

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