Apparatus and method for measuring longitudinal modulus of elast

Details Apparatus and method for measuring longitudinal modulus of elast Apparatus and method for measuring longitudinal modulus of elast

1997-08-26

1999-07-13

Font, Frank G.

Optics: measuring and testing

For optical fiber or waveguide inspection

73160, G01N 2184

Patent

active

059234156

ABSTRACT:
There is provided an apparatus for measuring a longitudinal modulus of elasticity of a fiber used for composite material, including a holder for supporting a single fiber at its one end in a cantilever fashion, a heater for heating the single fiber, a measurement device for measuring deflection of the single fiber, and a calculator for calculating a longitudinal modulus of elasticity of the single fiber in accordance with a deflection measured by the measurement device, provided that the single fiber is equivalent to a beam receiving uniformly distributed load thereon based on a dead weight thereof. For instance, the heater includes a closed container having a transparent window through which the deflection of the single fiber is measured The measurement device is a laser displacement gauge or an optical displacement gauge. The apparatus makes it possible to readily and rapidly measure a longitudinal modulus of elasticity of a single fiber in various temperatures including room temperature by using only a single fiber.

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"Strength Data Book" edited by strength design data book edition committee, Shokabo, 1962, p. 348.

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