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US 5,255,562 AGranted
Measurement of interfacial strength of a composite material
AssigneeShimadzu Corporation
InventorsYasunori Yamamoto, Tsukasa Nishimura
Life of this patent
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AssigneeShimadzu Corporation
InventorsYasunori Yamamoto, Tsukasa Nishimura
Estimating the term…
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.
An apparatus for measuring interfacial strength of a composite material, said apparatus comprising:
A method of measuring interfacial shear strength between reinforcing fibers and a matrix of a composite material, said method comprising the steps of:
Dependencies are inferred from the claim text.