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| - The fiber pushout test is a mechanical test performed on composite materials where a fiber is mechanically pushed out of the material. This test is carried out with the purpose of measuring the matrix/fiber interface de-bonding energy and the effects of frictional sliding between the matrix and the fiber. To perform this test flat indentation tips, usually made of diamond or tungsten, are used. These tips are mechanically lowered onto the location of the fiber on the composite using a CCD This test is not to be confused with fiber pull-out, which is a composite crack propagation phenomenon. (en)
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| - The fiber pushout test is a mechanical test performed on composite materials where a fiber is mechanically pushed out of the material. This test is carried out with the purpose of measuring the matrix/fiber interface de-bonding energy and the effects of frictional sliding between the matrix and the fiber. To perform this test flat indentation tips, usually made of diamond or tungsten, are used. These tips are mechanically lowered onto the location of the fiber on the composite using a CCD This test is not to be confused with fiber pull-out, which is a composite crack propagation phenomenon. The mechanics behind the test are as follows:1. Elastic loadingThe flat tip indenter is lowered onto the fiber using a CCD camera to guide the indenter downwards2. Progressive de-bondingThe indenter touches the fiber and begins applying load, bonds begin to break between the matrix and the fiber3. Fiber push throughThe bonds between the matrix and fiber are totally broken and the fiber begins to slide out of the matrix4. Interfacial slidingthe indenter continues to push the fiber through the matrix, the only force resisting this movement is frictional5. Indenter matrix collisionThe fiber has been totally pushed out of the matrix and the indenter collides with the matrix surface. This gives the total displacement of the fiber. (en)
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