Virtual prediction method for mechanical behaviors of laminated composites

Abstract

The invention relates to the field of characterization of mechanical properties, in particular to a virtual prediction method for mechanical behaviors of laminated composites. The method includes the steps of 1, establishing a three-dimensional model of laminated composite in finite element software (such as Abaqus); 2, meshing and restraining the three-dimensional model established in the step 1; 3, simulating tensile deformation of the laminated composite, and extracting a true stress-strain curve; 4, correcting model parameters according to the true tensile mechanical property of the laminated composite. According to the method, the macroscopic-microscopic multi-scale coupling finite element method is used to accurately predict the mechanical behaviors of laminated composites in the plastic deformation process; meanwhile, matrix and interface damage evolution models are coupled and can be used for predicting tensile mechanical property indexes of the composites and formation indexes of composite plates, such as ductility and drawing; the method is applicable to virtual prediction and analysis of metal flow and forming limit in the forming processes of composite plates, such as stamping and drawing.

Description

technical field [0001] The invention relates to the field of mechanical performance characterization, in particular to a virtual prediction method for the mechanical behavior of layered composite materials, which belongs to the finite element simulation method. Background technique [0002] Composite materials are composed of two or more materials with different properties, through physical or chemical methods, macroscopically composed materials with new properties. Various materials learn from each other in terms of performance and produce synergistic effects, so that the comprehensive performance of composite materials can optimize the original composition materials to meet various requirements. With the worldwide energy shortage and the continuous rise of fuel prices and other problems, composite materials have attracted more and more attention due to their unique advantages and properties, showing a booming trend, such as excellent specific strength And specific stiffne...

AI Technical Summary

Problems solved by technology

At present, scholars at home and abroad have conducted extensive and in-depth research on the interfacial bonding mechanism and diffusion models of layered composite materials, but there are few reports on the prediction of mechanical behavior such as interfacial bonding strength of composite materials.

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