Instrument for the application of controlled mechanical loads to

Details Instrument for the application of controlled mechanical loads to Instrument for the application of controlled mechanical loads to

1993-06-23

1995-04-18

Raevis, Robert

Measuring and testing

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

By loading of specimen

435 3, G01D 702

Patent

active

054068533

ABSTRACT:
Apparatus and methods are disclosed facilitating the application of forces and measurement of dimensions of a test subject. In one arrangement the test subject is coupled to a forcing frame and controlled forces applied thereto by a series of guideways and sliders. The sliders, which contact the test subject are in force transmitting relation to a forcing frame. Tension, compression and bending forces can be applied to the test subject. Force applied to the test subject is measured and controlled. A dimensional characteristic of the test subject, such as growth, is measured by a linear variable differential transformer. The growth measurement data can be used to control the force applied. Substantially uniaxial stretching is achieved by placing the test subject on an elastic membrane stretched by an arrangement of members securing the elastic member to the forcing frame.

REFERENCES:
patent: 2154280 (1939-04-01), Nadai et al.
patent: 3712125 (1973-01-01), Meyer
patent: 3927558 (1975-12-01), Philippe et al.
patent: 4456683 (1984-06-01), Lintilhac et al.
patent: 4901581 (1990-02-01), Fain et al.
Bunsell et al., "An Apparatus for Fatigue-Testing Fibres" J. Phys E, vol. 4, No. 11 (Nov. 1971).

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