Virtual test method of plastic forming property of particle reinforced aluminum matrix composite

Abstract

The invention belongs to the field of composite plastic forming, and particularly provides a virtual test method of the plastic forming property of a particle reinforced aluminum matrix composite. The method includes the steps that (1) geometric reconstruction is conducted on a microstructure of the particle reinforced aluminum matrix composite; (2) meshes of a geometric model, established in the step (1), of the microstructure are divided through an object-oriented finite element technology, and the model is restricted; (3) in finite element software, material attributes are given to the meshes in the step (2), and a matrix damage model, a particle breakage damage model and an interface debond damage model are coupled; (4) the plastic forming property test experimental process is simulated in finite element simulation software, and then plastic forming property indexes of the composite are acquired. According to the method, the plastic forming property of the particle reinforced aluminum matrix composite can be accurately and virtually predicted, experimental test cost of the plastic forming property of the composite can be lowered, operation is easy to conduct, and convenience is brought for technical staff to use.

Description

Technical field [0001] The invention belongs to the field of plastic forming of composite materials, and specifically is a virtual test method for the plastic formability of particle-enhanced aluminum-based composite materials. Background technique [0002] Particle-reinforced aluminum-based composites are made of aluminum alloy as the matrix, one or several metal or non-metal particles as the reinforcing phase, and are prepared by powder metallurgy, stirring casting, spray deposition, and plastic processing. Composite materials. As a new structural material with excellent performance, particle-reinforced aluminum-based composites have the advantages of high wear resistance, high specific strength, high specific stiffness, high thermal conductivity and low thermal expansion coefficient. Therefore, since the 1980s, particle-reinforced aluminum-based composite materials have developed rapidly, and have shown broad application prospects in the fields of aerospace, advanced weapons,...

AI Technical Summary

Problems solved by technology

[0004] At present, scholars at home and abroad mainly use experimental testing methods to study the plastic formability of composite materials. However, the type, size and volume fraction of particles in particle-reinforced composite materials will affect the plastic formability of composite materials. The particle reinforcement of each component The plastic formability of composite materials needs to be tested separately, and the experimental cost is high

In terms of numerical simulation of plastic formability of composite materials, existing studies mostly use simplified unit cell models, and only one or two damage mechanisms are considered in the model, and there is a certain gap between the simulation results and the experimental results

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