Rapid characterization method for mechanical properties of composite material

Abstract

The invention relates to a rapid characterization method for the mechanical properties of a composite material. The method comprises the steps that a plurality of groups of blocky composite material experimental samples with different internal porosity conditions are prepared; the material porosity Por% measurement experiment is carried out on each group of experimental samples respectively; material evaporation characteristic time (ECT) measurement is carried out on each group of experimental samples respectively; and after the porosity Por% and the evaporation characteristic time (ECT) of each group of experimental samples are measured, the mechanical failure experiment is carried out on a press machine, and the corresponding mechanical strength indexes are obtained through measurement.

Description

technical field [0001] The invention relates to a method for characterizing the mechanical properties of materials, especially the evaluation of the mechanical properties of composite materials. This method can evaluate the mechanical properties of materials simply, quickly and without damage. Background technique [0002] Studying the matrix pores of composite materials is of great significance for knowing the macroscopic mechanical properties of materials. There have been in-depth studies on the influence of porosity on the mechanical properties of materials at home and abroad, but if the uniformity of pore distribution in the material is not considered, it is not comprehensive to only study the relationship between porosity and mechanical properties. [0003] For the characterization methods of mechanical properties of composite materials, there are mainly mechanical performance testing methods and finite element numerical simulation analysis methods. It has been proved ...

AI Technical Summary

Problems solved by technology

However, if the pore size and shape are different, it is difficult to obtain correct results, and this method is a destructive inspection method.

In previous patents, as described in CN102879312A, a light source is used to irradiate porous materials, and the projected optical signals are converted into electrical signals to collect changes in porosity. Although it is also a non-destructive test, it is obviously more suitable for detecting materials with continuously changing porosity, and The experimental collection is time-consuming and laborious; the patent CN104833728A uses a composite material porosity detection block to simulate the internal pores of the composite material, and uses ultrasonic technology to scan and verify, but the steps to make the detection block are complicated, and it is impossible to completely simulate the internal conditions of the material

[0005] For the detection of the uniformity of the pore distribution in the material, there are not many patents at present. CN104833728A proposes to use ultrasonic technology to scan the uniformity of the material pores, but the cost of ultrasonic technology is relatively high

Images