Method for determining a coefficient of moisture expansion of a

Details Method for determining a coefficient of moisture expansion of a Method for determining a coefficient of moisture expansion of a

1992-06-26

1993-10-12

Yasich, Daniel M.

Measuring and testing

Moisture content or absorption characteristic of material

177 50, 374 14, 374 55, G01N 2516, G01N 504

Patent

active

052514765

ABSTRACT:
A novel method for determining a coefficient of moisture expansion of a single, identified workpiece or coupon. The method includes the steps of positioning the workpiece in a chamber having known environmental parameters; determining a workpiece length change .DELTA.L caused by a chamber induced change in the workpiece moisture content .DELTA.M, by positioning first and second transformers to opposite ends of the single workpiece; and, measuring a chamber induced change in the workpiece moisture content .DELTA.M, by weighing the workpiece.

REFERENCES:
patent: 4672842 (1987-06-01), Hasselmann
patent: 4771631 (1988-09-01), Lehtikoski et al.
patent: 4923307 (1990-05-01), Gilmore et al.
patent: 4924477 (1990-05-01), Gilmore et al.
Structural Development and Moisture Absorption Behavior of a Graphite/Epoxy Optical Metering Structure for Landsat-D; R. Cline et al.; pp. 1368-1381.
Moisture and Thermal Expansion of Composite Materials; D. S. Cairns et al.; Nov., 1991; U.S. Dept. of Commerce, NTIS.

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