This work has established that the propagation of acoustic wave through polymers and their fiber composites is a suitable technique for cure monitoring. It is found that the reinforcing carbon fibers have certain effect on the sonic velocity of an epoxy/CF composite sample. Fibers whose orientation coincides with the probe alignment have the most damping effect on the sonic velocity response. This work has also demonstrated that to monitor the sonic response of the resin matrix in a multi-ply composite, the sonic probes (transducers and crystals) must be aligned at an off angle to the fiber direction in any laminae of the composite. It also establishes the fact that the sonic signals can be easily converted to modulus values that can be analyzed by classic micromechanic theories and analytical schemes.
|Number of pages||5|
|Journal||Annual Technical Conference - Society of Plastics Engineers|
|Publication status||Published - 1986 Dec 1|
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