Method for obtaining residual stress of C-fiber reinforced resin matrix composite at thermocuring temperature

Abstract

The invention discloses a method for obtaining the residual stress of a C-fiber reinforced resin matrix composite at a thermocuring temperature and relates to the method for obtaining the residual stress of the C-fiber reinforced resin matrix composite. The method aims to solve the technical problems that a traditional method for detection of the residual stress requires huge investment of manpower and materials and a quite long period, and the experimental cost is high. The method comprises the steps that firstly, the mechanical properties and the coefficient of thermal expansion of the C-fiber reinforced resin matrix composite are input to a computer; secondly, the thermocuring temperature and the room temperature are input to the computer, and residual stress distribution of single-layer boards made of the C-fiber reinforced resin matrix composite is deduced through a numerical simulation method, so that the contact relation between the single-layer boards is obtained; thirdly, a numerical relation between the contact relation between the single-layer boards and the residual stress of the C-fiber reinforced resin matrix composite is established, calculation is conducted, and then the process is completed. The method is applied to the field of determination of the C-fiber reinforced resin matrix composite.

Description

technical field [0001] The invention relates to a method for obtaining the residual stress of a C fiber reinforced resin matrix composite material. Background technique [0002] Composite materials are widely used in various industries due to their excellent specific strength, specific modulus and other properties. In particular, the proportion of C fiber reinforced resin-based composite materials used in aviation, aerospace and other related manufacturing industries is increasing year by year. However, the unknowability of residual stress distribution will lead to the insufficient guarantee of the quality and reliability of C fiber reinforced resin matrix composites, which seriously affects the development of C fiber reinforced resin matrix composites. Therefore, it is of great significance to understand the distribution of residual stress in composite materials to ensure the safe use of composite materials. Traditional methods for detecting residual stress mainly include...

AI Technical Summary

Problems solved by technology

[0003] The present invention is to solve the technical problems of the traditional method of detecting residual stress, which requires huge manpower and material resources, and requires a long period of time and high experimental costs, thereby providing a C fiber-reinforced resin-based composite material obtained by thermal curing temperature. Methods for Residual Stress in Materials