Characterization of the Nonlinear Elastic Properties of Graphite/Epoxy Composites Using Ultrasound
نویسندگان
چکیده
The normalized change in ultrasonic "natural" velocity as a function of stress and temperature was measured in a unidirectional laminate of T300/5208 graphite/epoxy composite using a pulsed phase locked loop ultrasonic interferometer. These measurements were used together with the linear (second order) elastic moduli to calculate some of the nonlinear (third order) moduli of this material.
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