A continuous carbon fiber bistable ring-shaped cushion structure and a preparation method thereof

Abstract

The present application relates to a kind of continuous carbon fiber bistable ring buffer structure, belong to continuous fiber reinforced composite field.The structure includes at least three bistable sheet and the circular arc connecting piece of connecting adjacent bistable sheet;Each bistable sheet is directly laminated by two pieces of independently printed unidirectional continuous carbon fiber reinforced thermoplastic single-layer sheet, and the fiber laying direction of two layers is orthogonal and without shape memory polymer function intermediate layer;Sheet side edge is inserted into connecting piece mounting slot and is alternately connected into closed ring along circumference, and bistable sheet on loading path is jumped from first stable configuration to second stable configuration when being compressed in radial direction.Two orthogonal single-layer sheets are constrained by metal block during preparation, heat treated at 220 DEG C for 35-50 min and constrained cooling demoulding, then embedded into ring along circumference.The structure can obtain bistability under the condition of no function intermediate layer, and form phased radial compression response containing configuration conversion stage.

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