Fixing device and fixing method for transverse tensile test of ceramic-based fiber bundle composite material

Abstract

The invention relates to a fixing device and a fixing method for a transverse tensile test of a ceramic-based fiber bundle composite material. The device comprises a transverse tensile sample, a centering sample preparation device and a transverse tensile clamp, wherein the transverse tensile sample is composed of a sheet-shaped ceramic-based fiber bundle composite material, a front flat plate reinforcing sheet and a rear flat plate reinforcing sheet, the front end and the rear end of the sheet-shaped ceramic-based fiber bundle composite material are placed in the fixing step grooves of the front flat plate reinforcing sheet and the rear flat plate reinforcing sheet respectively and are fixed through glue. The centering sample preparation device comprises a left centering plate, a right centering plate, a left fixing block, a right fixing block and an end fixing block. The transverse tensile clamp comprises a front clamping head, a rear clamping head, a front clamp body, a rear clamp body, a front fixing block and a rear fixing block. According to the test device and the test method, the fixation of the transverse tensile stress-strain curve measurement test piece of the ceramic-based fiber bundle composite material is realized, and a foundation is laid for the establishment of an anisotropic mechanical model of the ceramic-based fiber bundle composite material.

Description

technical field [0001] The invention belongs to the field of mechanical behavior tests of composite materials, and in particular relates to a fixing device and a fixing method for transverse tensile tests of ceramic-based fiber bundle composite materials. Background technique [0002] Braided ceramic matrix composites have good temperature resistance, high specific strength, low density and strong designability. They are the preferred materials for advanced aero-engine hot end parts and have broad application prospects. [0003] The main load-bearing unit of the braided ceramic matrix composite is the inner yarn part, that is, the ceramic matrix fiber bundle composite. The mechanical behavior prediction of braided ceramic matrix composites can be realized through the mechanical model of ceramic matrix fiber bundle composites under the multi-scale framework. The establishment of mechanical model of ceramic matrix fiber bundle composite must be based on its mechanical test. ...

AI Technical Summary

Problems solved by technology

Since the geometry of traditional ceramic-based fiber bundle composites is an irregular slender cylinder with small dimensions, there are only mechanical test methods for axial tensile loads in the prior art, and there is no method for transverse tensile loads of ceramic-based fiber bundle composites. The mechanical test method under tensile load, so the accurate transverse tensile mechanical performance data of ceramic matrix fiber bundle composites cannot be obtained at this stage

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