Apparatus and method for ultrasonically measuring the Poisson's

Details Apparatus and method for ultrasonically measuring the Poisson's Apparatus and method for ultrasonically measuring the Poisson's

1993-06-29

1995-09-05

Chilcot, Jr., Richard E.

Measuring and testing

Vibration

By mechanical waves

73620, 73624, G01N 2900

Patent

active

054470692

ABSTRACT:
An untrasonic technique is presented which permits accurate measurement of the Poisson's ratio for a specimen which exists as a thin (<10 mil) layer. This technique measures resonance and should prove especially useful in situations where a bulk specimen is either not readily available or would not properly reflect the properties of the material when configured as a thin layer. A detailed discussion of the theory underlying the technique is included. The technique is then used to determine the values of Poisson's ratio of three thin specimen materials. These values were then contrasted to those of the bulk specimens obtained in a more conventional manner. The technique as presented could be extended for a number of applications, including the cure monitoring of adhesives.

REFERENCES:
patent: 4821574 (1989-04-01), Takamizawa
patent: 5167157 (1992-12-01), Wertz et al.
patent: 5243855 (1993-09-01), Steiger et al.
patent: 5305239 (1994-04-01), Kinra

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