Multi-axial fatigue testing machine

Details Multi-axial fatigue testing machine Multi-axial fatigue testing machine

1988-02-22

1989-02-07

Levy, Stewart J.

Measuring and testing

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

By loading of specimen

73816, G01N 332

Patent

active

048023655

ABSTRACT:
A machine for testing ball joints, elastomer bushings or other parts has a pair of mutually rotated gimbals attached to the outer shell or element for applying rotational displacements about two axes and a linear input attached to the inner element to apply a force along another axis. Each axis input is effected by a linear actuator and the gimbal inputs are specially designed to assure accurate independent control without parasitic motion between the inputs. Force and displacement transducers monitor each axis to provide feedback signals to control circuits. A heat chamber including the gimbal assembly has hot air applied from an external source through a hollow gimbal hub to hold the test specimen at a desired temperature.

REFERENCES:
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patent: 3277701 (1966-10-01), Tannenberg
patent: 3304768 (1967-02-01), Naumann et al.
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patent: 3580059 (1971-05-01), Dalton
patent: 3712125 (1973-01-01), Meyer
patent: 3719346 (1973-03-01), Bohannon et al.
patent: 4089211 (1978-05-01), Vercellone et al.
patent: 4658656 (1987-04-01), Haeg
patent: 4718281 (1988-01-01), Crews, Jr.

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