A multi-scale coupled curing analysis method for resin matrix composites

Abstract

The invention discloses a multi-scale coupling solidification analysis method for a resin-based composite material, comprising: establishing a microscopic analysis model of the resin-based composite material according to the periodic microstructure characteristics of the resin-based composite material; Based on the boundary conditions, the curing characteristics of the microscopic analysis model are obtained by using the resin curing kinetic model, and the mechanical properties of the microscopic analysis model of the composite material are obtained by using the structural mechanics model of the resin matrix composite material; the macroscopic model of the resin matrix composite material is established, and the curing characteristics and mechanics Properties are assigned to the macro model as attributes; by imposing boundary conditions on the macro model of resin matrix composites, the curing analysis results are obtained using finite element analysis. The invention can focus on the macroscopic structure of the resin-based composite material, consider its curing characteristics from the microscopic structure, grasp the curing mechanism of the resin-based composite material in essence, thereby improving the modeling and calculation efficiency while ensuring accuracy.

Description

technical field [0001] The invention is applied to the field of composite material simulation, especially the field of solidification simulation of resin-based composite materials, and in particular relates to a multi-scale coupling solidification analysis method for resin-based composite materials. Background technique [0002] Composite materials are obtained by mixing two or more materials through physical or chemical means, including matrix phase and reinforcement phase. Forming and curing of resin-based composite materials is a very critical link in the production and manufacture of composite materials. During the curing process, the temperature field and curing degree field inside the composite material are unevenly distributed, so the composite material will experience different degrees of thermal expansion and curing shrinkage, which will cause thermal stress and curing shrinkage stress. The existence of these internal stresses has a great influence on the mechanica...

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Problems solved by technology

However, the main problem of the above method is that it ignores the microscopic characteristics of composite materials, lacks the understanding of the essence of the curing process of composite materials, and needs to develop corresponding phenomenological theories for different materials, and the application range and accuracy of the method are limited.

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