Measurement of interfacial strength of a composite material

Details Measurement of interfacial strength of a composite material Measurement of interfacial strength of a composite material

1992-10-07

1993-10-26

Yasich, Daniel M.

Measuring and testing

Sheet, woven fabric or fiber

Filament

73 78, 364508, G01D 102, G01N 324

Patent

active

052555623

ABSTRACT:
Interfacial strength of a composite material between its fibers and matrix is measured by observing a sample material through a microscope, measuring the diameter of selected one of the fibers by moving indicators in the field of vision of the microscope, applying pressure on the selected fiber by means of an indentator and measuring both the displacement of the indentator and the load on the fiber, and thereby obtaining a curve between the indentator displacement and the square root of the load. The curve has a straight portion and the point at which the curve begins to deviate from the straight portion is determined. The load value corresponding to this point is used to calculate debonding and sliding interfacial shear strengths of the material according to given formulas.

REFERENCES:
patent: 4635471 (1987-01-01), Rogers et al.
patent: 4807465 (1989-02-01), Botzolakis et al.
patent: 4942768 (1990-07-01), McRae
patent: 4947341 (1990-08-01), Shine

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