Gluing fixed support for tensile property tests on fiber multifilaments and fiber multifilament sample preparing method

Abstract

The invention relates to a gluing fixed support for tensile property tests on fiber multifilaments and a fiber multifilament sample preparing method. The gluing fixed support comprises a fixed support body, one end of the fixed support body is provided with a plurality of fixed round rods, the other end of the fixed support body is correspondingly provided with separating round rods (the number of the separating round rods is the same as the number of the fixed round rods), each glue-dipped fiber multifilament after being hung on one fixed round rod is formed into two mutually-parallel parts, the two ends of each glue-dipped fiber multifilament are respectively located on both sides of one separating round rod and connected with a heavy object (hung in the air) through a fixture, and the masses of the heavy objects are the same so as to ensure that the cured tensile forces of the glue-dipped fiber multifilaments are completely the same. The fiber multifilament is fixed at one end of the gluing fixed support for tensile property tests on fiber multifilaments disclosed by the invention, and the other end of the gluing fixed support ensures that a fiber always has a constant tensile force in the process of glue dipping and curing by way of hanging weights, therefore, bent sample bands or sample bands with glue beads do not occur, and the yield rate of the sample band is 100%, thereby greatly improving the qualified rate of the sample band.

Description

technical field [0001] The invention relates to a gluing fixing frame for testing the tensile properties of fiber multifilaments and a sample preparation method for fiber multifilaments. Background technique [0002] GB / T 3362—2005 Carbon Fiber Multifilament Tensile Performance Test Method and GJB348-87 Aramid Multifilament Tensile Performance Test Method both have the process of multifilament dipping and curing, but the tension of the existing glue fixing frame is Straightening and tensioning of the multifilament is the standard, and the tension cannot be measured and controlled during curing, and it is easy to bend the cured spline and produce glue beads due to reasons such as loosening of the fixed end, thermal expansion and contraction, and the weight of the impregnated multifilament. (See "Journal of Composite Materials" 2009, 29 (2): 17). In this way, the production rate of qualified splines is reduced, and the obtained performance data has large dispersion. [0003]...

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Problems solved by technology

[0004] The present invention has designed a kind of fiber multifilament tensile performance test gluing fixing frame and fiber multifilament sample preparation method, and the technical problem it solves is that the tension force of fiber multifilament gluing solidification in the existing fiber multifilament tensile performance test is Straightening and tightening by spring or hand, the tension cannot be adjusted and controlled

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