Multifilament tensile test sample preparation apparatus

Abstract

The invention relates to a multifilament tensile test sample preparation apparatus, an accessory mainly comprises a reinforcing part and a heating part, and the reinforcing part comprises a melt adhesive cavity, a cavity top cover and a reinforcing support, and the heating part comprises an electrical heating layer and a temperature controller outside an integral support. The sample preparation apparatus can overcome the partial disadvantage of intensity measurement by fiber bundle, problems of easy pinch-off if fiber while testing and difficult control of clamping force can be solved, difficulty of easy bending of the fiber bundle when the fiber bundle is clamped can be simultaneously solved, discrete degree of the test result is reduced, experiment credibility and experiment data accuracy can be increased, a filament stretching experiment can be carried out through the experiment equipment, result accuracy is increased, the hot melt adhesive can be used in the cavity, cycle usage of the accessory is realized, and cost is saved.

Description

technical field [0001] The invention relates to a tensile test device, in particular to a device for preparing a multifilament tensile test sample. Background technique [0002] Fiber strength properties testing is the main way to determine fiber properties. The properties of the fiber are tested with multifilament fiber test and multifilament test. At present, multifilament is widely used in our country to test the fiber tensile test, and then the mechanical properties of multifilament are inferred from the test results. There is currently no unified national standard for the test of the multifilament tensile test of silicon carbide fibers. GBT 3362-2005 Test method for tensile properties of carbon fiber multifilaments is used as a reference for tensile testing of silicon carbide fiber multifilaments. [0003] According to GBT 3362-2005 carbon fiber multifilament tensile properties test method, the fiber is made into 25mm length, the span is 15mm, the multifilament dippi...

AI Technical Summary

Problems solved by technology

Using this method to prepare samples is simple and easy, but it is difficult to control the strength of the reinforcing sheet. If the strength is too small, the sample will easily slip when stretched; if the strength is too large, the fiber bundles will easily break at the chuck position, which will affect the accuracy of the experimental results.

During the loading process, the fibers are prone to bending and not perpendicular to the stretching direction, which makes the experimental results more discrete.

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