Fiber push-out device based on scanning electron microscope environment

Abstract

The invention discloses a fiber push-out device based on a scanning electron microscope environment, and the device comprises a scanning electron microscope, a micro stretching platform, a data converter, a closed shell, a connecting rod and a press head, wherein the micro stretching platform is fixed inside the closed shell, one end of the connecting rod is fixed on the micro stretching platform, the other end of the connecting rod is connected with the press head, and n interface of a cavity body of the scanning electron microscope is connected with a connecting port of the closed shell in a closing way. The fiber push-out device can be used for measuring interface strength of a fiber enhanced composite material and a residual stress field nearby the interface, observing a mesomechanics process of the interface damage and analyzing a distribution principle of the interface stress so as to provide a new mean for researching the mechanical performance of the fiber enhanced composite material interface. The fiber push-out device can be used for analyzing the interface residual stress field of several key composite materials which are widely used in the aerospace field, the relation between the interface residual stress field and the material macro performance is researched according to the numerical calculation and simulation technique, and evidence is supplied for the engineering design.

Description

Technical field: [0001] The invention relates to a fiber pushing device, in particular to a fiber pushing device based on a scanning electron microscope environment. Background technique: [0002] Fiber-reinforced composite materials are more and more widely used in engineering, especially in aviation, aerospace and some high-tech industries, and have achieved remarkable results in improving the performance of engineering structures. The interface area accounts for a large proportion in fiber reinforced composites, and the properties of the interface will directly affect various mechanical properties of fiber reinforced composites. Therefore, the interface mechanics of fiber reinforced composites has become one of the most active research fields. During the molding process of fiber-reinforced composites, due to the mismatch of thermal expansion coefficient and elastic modulus of fibers and matrix, after the material is consolidated, a residual stress field is formed near the...

AI Technical Summary

Problems solved by technology

[0003] Although many theoretical and numerical models have been established for the research on the interface mechanical properties of fiber reinforced composites, so far, there are relatively few experimental studies in this area.

The main reason is that the studied area is very small, the fiber diameter is usually only a few microns to tens of microns, and the interface area is even smaller, so it is very difficult to measure the stress distribution in such a small area

For metal-based fiber-reinforced composite materials, X-ray method and neutron diffraction method can be used to study the interface mechanical properties, but for resin-based fiber-reinforced composite materials, there is basically no way at present

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