Apparatus and process for measuring mechanical properties of fib

Details Apparatus and process for measuring mechanical properties of fib Apparatus and process for measuring mechanical properties of fib

1992-05-20

1993-12-14

Cuchlinski, Jr., William A.

Measuring and testing

Sheet, woven fabric or fiber

Filament

73579, G01N 2700, G01N 2900, G01H 1700

Patent

active

052691810

ABSTRACT:
A process and apparatus for measuring mechanical properties of structural fibers. The process comprises the steps of suspending at least one fiber from a rigid fixture so that it may hang vertically therefrom; attaching a mass to the fiber, thereby placing the fiber in tension; guiding the mass in a frictionless manner to avoid extraneous damping so that only extensional motion is permitted; exciting the mass and the fiber with a longitudinally directed impulse to induce an amplitude of extensional vibration; generating output signals according to the impulse and the vibration response; and communicating computing means with the output signals. The computing means stores data for deriving certain material properties of the fiber based upon the output signals and computes the material properties.

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Leary, B., "The Design and Construction of a Vibrating String Evenness Tester for Textile Yarns," Instrument Practice, pp. 1179-1187 (Nov. 1958).
Kawabata, S., "Measurements of Anisotropic Mechanical Prop. & Thermal Conductivity of Single Fiber for Several High Performance Fibers", 253-262, Proc. 4th Japan. U.S. Conference on Composite Materials, Technomic Pub. Co., Lancaster, Pa. (1989).
DiCarlo, J. A. & Williams, W., "Dynamic Modulus & Damping of Boron, Silicon Carbide & Alumina Fibers", NASA TM 81422:E345 (1980).
Gibson, et al, "Development of an Apparatus to Measure Dynamic Modulus & Damping of Reinforced Fibers at Elevated Temperature", Soc. for Exper. Mech, Inc. Jun. 9-12, 1991.

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