Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1994-07-28
1995-10-24
Chilcot, Richard
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73814, 73843, 73854, G01N 322
Patent
active
054600529
ABSTRACT:
An apparatus and method for measuring interface properties of a composite test specimen includes a first jaw for gripping the specimen. The specimen has a fiber extending through a matrix forming a fiber-matrix interface with a portion of the fiber extending from the matrix. A second jaw grips the fiber extending from the matrix. A motor drive coupled to the first jaw rotates the fiber relative to the matrix. The torque transmitted through the fiber-matrix interface to the fiber is measured with a stationary torque transducer coupled to the second jaw with respect to the angular rotation of the fiber relative to the matrix. From the resulting torque-twist angle plot, composite interface properties such as interfacial fracture energy and frictional traction can be obtained.
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Chepolis William
Erturk Turgay
Chilcot Richard
Dombroski George M.
University of Massachusetts Lowell
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