Method of making damped composite structures with fiber wave pat

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

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156179, 156324, 156440, B32B 502

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active

060484268

ABSTRACT:
A method and apparatus of manufacturing a composite material which is light weight and highly damped against vibration. The composite material comprises fibers embedded in a resin matrix wherein the fibers are oriented in a waveform that is substantially continuously variable as to period, amplitude and/or shape. A viscoelastic material is combined with the resin matrix to provide vibration dampening characteristics. The variation in the period/amplitude takes place in a region of the composite structure which is selected to provide optimum strength and dampening characteristics as desired for the particular application. Even without the viscoelastic material, the light weight structure is useful as a pre-preg material from which other composite structures may be formed. Methods of manufacturing the composite material include using multiple, identical cells in which each cell is used to fabricate a fiber, resin matrix and viscoelastic adhesive composite. Rollers, sprays or perforated roller techniques may be employed to lay down the various layers. During the fabrication process, plural pairs of pinch rollers, moving axially with respect to each other are used to lay down the fibers within the resin/viscoelastic composite in a waveform pattern having a variable and controllable period, amplitude and/or shape.

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