Tool and method for winding and sample preparation of carbon fiber multifilament

Abstract

The invention discloses a tool and method for carbon fiber multifilament winding sample preparation, and relates to the technical field of material performance testing. The tool comprises a winding support, the winding support comprises at least one winding assembly, and each winding assembly comprises two end frames and a winding rod connected with the two end frames; a plurality of fixing hooksare arranged on the opposite sides of the two end frames in the circumferential direction, and openings of the fixing hooks face the centers of the end frames; two supporting frames which are arrangedon the two sides of the winding support respectively; a ratchet mechanism which comprises a ratchet wheel and a pawl, the ratchet wheel is rotationally connected to a supporting frame through a rotating shaft, one end of the pawl is connected to the supporting frame through a pawl shaft, and the other end of the pawl is meshed with outer edge teeth of the ratchet wheel; and a hanging needle is arranged on the ratchet wheel or the rotating shaft. According to the tool for winding and sample preparation of the carbon fiber multifilament, the winding process of an engine shell can be simulated more accurately, and the actual strength of carbon fibers applied to the engine shell can be represented more accurately.

Description

Technical field [0001] The invention relates to the technical field of material performance testing, in particular to a tooling and method for carbon fiber multifilament winding sample preparation. Background technique [0002] The main process of applying carbon fiber to the solid rocket engine shell is the fiber winding process. Due to the high modulus and brittleness of carbon fiber, a certain loss of strength is inevitable during the winding process. Therefore, accurately characterizing the strength of carbon fiber after the winding process is the key to the application of carbon fiber to the solid rocket motor shell. [0003] At present, the preparation of existing carbon fiber multifilament tensile test samples is mainly based on GB / T3362 and GB / T26749. The sample preparation method stipulated in GB / T3362 is to fix the fiber on the yarn hanger by manual winding method, and then dipping the sample to prepare. Because the carbon fiber has not undergone the winding process, th...

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Problems solved by technology

Because the carbon fiber has not been wound, the fiber damage is small, and the strength of the carbon fiber tested is high, so it does not reflect the actual application strength of the carbon fiber

The sample preparation method stipulated in GB / T26749 is to dip the fiber through the glue tank first, and then simply wind the dipped fiber on the frame. The sample preparation process is similar to the fiber winding process, but this method cannot control carbon fiber. The tension of the multifilaments is likely to cause uneven stress on the carbon fiber multifilaments, so it cannot accurately reflect the actual application strength of carbon fibers in the winding process of the engine casing

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