Strength prediction method for composite materials based on electrical impedance imaging damage monitoring

Abstract

The invention discloses a composite material strength prediction method based on electrical impedance imaging damage monitoring. The composite material strength prediction method based on electrical impedance imaging damage monitoring comprises the following steps: 1. the electrical impedance imaging damage detection step builds an electrode array for current excitation and voltage measurement tothe outer boundary of the tested structure; the measured data are used to reconstruct the resistivity distribution image and display it graphically, and the mapping relationship between the damage condition and the resistivity distribution is used to detect the structural damage in real time; 2, the damage real-time detection result obtained by the damage detection step of the electrical impedanceimage is combined with the theory of the finite element progressive damage strength analysis to realize the structural strength prediction. Fusion of damage detection information which is close to the unknown real damage status of structural parts can accurately predict the residual strength of structural parts under the condition of damage.

Description

technical field [0001] The invention belongs to the technical field of strength prediction, and in particular relates to a composite material strength prediction method based on electrical impedance imaging damage monitoring. Background technique [0002] One of the main tasks of structural design is to try to ensure that the structural parts meet the requirements of the working conditions and avoid damage to the structural parts during use. However, there are many factors that cause damage to structural parts, such as external loads, working environment, manufacturing process, etc., so it is difficult to ensure that the components will not be damaged during the initial design, and because most of these factors are unpredictable, it is difficult to accurately Know when and how components fail. The above-mentioned problems can be solved by using the online damage monitoring method. EIT technology is one of them. This technology is usually used to study research objects that...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a composite material strength prediction method based on electrical impedance imaging damage monitoring to solve the problem of inaccurate strength calculation results in the traditional technology. The method of the present invention can be implemented by EIT technology Carry out real-time precise positioning and analysis of the damage location and damage degree of the structure, and can simultaneously and accurately predict the remaining strength of the structural parts

Images