Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1985-12-27
1987-05-05
Myracle, Jerry W.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73827, G01N 2100
Patent
active
046622284
ABSTRACT:
For use in inspecting composite materials made of fibers in a supportive polymer matrix, a test instrument and method are set forth. The apparatus uses an optical microscope to provide a view of a cut specimen having small fibers therein. The optical axis through the microscope defines an arbitrary location. In x and y dimensions, at an offset of m and n from the optical axis, a stylus having a tip is located. Through the use of stepping motors connected through appropriate gear boxes, the stage supporting the specimen is moved. This locates a particular fiber previously positioned coincident with the optical axis so that it can be tested. Testing is accomplished by moving through the offset distances of m and n to position the stylus tip over the particular fiber. On movement in the z axis, the tip is embedded in the fiber to test bonding.
REFERENCES:
patent: 2420654 (1947-05-01), Cohen et al.
Giedd, G. R., Precision X-Y Table, IBM Technical Disclosure Bulletin, vol. 13, No. 6, Nov. '70.
Grande, D. H., Fiber/Matrix Interface in Composite Materials, MIT Master's Thesis, May 6, 1983, pp. 2,4,6,20,21,35-37,91,99,100-102.
Carter J. G.
Myracle Jerry W.
The Dow Chemical Company
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