Heat-electric injury testing system of carbon fiber reinforced resin matrix composite material

Abstract

The invention relates to a heat-electric injury testing system of a carbon fiber reinforced resin matrix composite material, comprising a damp heat box, a mechanical loading device of test pieces and a control device, wherein the mechanical loading device of the test pieces is arranged in the damp heat box, and parts of components in the control device are arranged on the mechanical loading device of the test pieces. The system provided by the invention can perform quantitative damp heat injury, electric current injury and united injury on the carbon fiber reinforced resin matrix composite material under functions of damp heat and electric current and also can accurately measure the dynamic changes of parameters such as electric resistance, temperature and strain of the carbon fiber reinforced resin matrix composite material under functions of heat and electric load. The system provided by the invention can meet the testing requirements of the test pieces with different sizes, is convenient in adjustment, can control and display the contact pressure, has a good software interface and a good data management function and provides an effective and reliable method for uncovering a failure mechanism of the carbon fiber reinforced resin matrix composite material under damp heat, electric current and heat-electric environments.

Description

technical field [0001] The invention belongs to the technical field of composite material testing, in particular to a thermal-electrical damage testing system for carbon fiber reinforced resin matrix composite materials. Background technique [0002] Due to the excellent mechanical properties of carbon fiber reinforced resin matrix composites, they have been widely used in aerospace, wind power generation, construction and other fields. During service, hot and humid environment is the usual environment. In addition, factors such as lightning strike current, induced current, and current generated by static charge discharge often act directly on the composite material structure and interact with humid and hot environmental factors, resulting in a significant reduction in the durability of the structure. At present, most researchers only consider the mechanical behavior of the material under hygrothermal conditions, but there are few reports on the mechanical behavior under th...

AI Technical Summary

Problems solved by technology

In the published literature on the influence of damp heat and current factors, the damp heat environment and the current environment are applied separately during material testing, and the interaction between the two is not considered when the two are applied at the same time. The mechanical properties after thermal-electrical damage are only One or two indicators have been tested, but no systematic research has been conducted; the test systems used are very simple, and they are only suitable for specific sizes of specimens, and the contact pressure between the specimen and the electrified electrode cannot be accurately measured and controlled, nor can it be Simultaneously collect parameters that reflect material damage such as specimen resistance, temperature, and strain

Images