Model reduced-order calculation method of parallel NTFA theory based on ABAQUS

A calculation method and model reduction technology, applied in the field of composite material simulation, can solve problems such as high calculation efficiency, complex model structure, and many variables, achieve high precision and improve calculation efficiency
CN113221408APending Publication Date: 2021-08-06ZHEJIANG UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV OF TECH
Publication Date
2021-08-06

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Abstract

A model reduced-order calculation method of a parallel NTFA theory based on ABAQUS comprises the steps of firstly constructing a three-dimensional RVE mesoscopic model; based on ABAQUS secondary development, utilizing a restart analysis function of ABAQUS, introducing a macroscopic false model, providing a parallel multi-scale coupling calculation method; based on initial space-time dependency of plastic strain, performing decomposition calculation on the initial space-time dependency, obtaining a system matrix through MATLAB programming, and carrying out secondary development on the ABAQUS, reading RVE plastic information obtained in the offline analysis stage of the mesoscopic model, and simultaneously solving and calculating the macroscopic model and the mesoscopic RVE in combination with a parallel double-scale theory. According to the method, on the premise that high precision is guaranteed, the problems existing in the prior art are well solved, and when the engineering problems of complex model structure and many variables are calculated, the calculation efficiency can be effectively improved through the method.
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Description

technical field

[0001] The invention relates to the technical field of composite material simulation, in particular to a model reduction calculation method based on ABAQUS parallel NTFA theory.

[0002] technical background

[0003] With the advancement of science and technology, composite materials are more and more used in aerospace, automobile industry, chemical industry, etc. , textile and machinery manufacturing, medicine and other fields. Therefore, the research on the structure and performance of composite materials is becoming more and more urgent and necessary.

[0004] However, composite material is a kind of anisotropic heterogeneous material. When using the existing finite element software to simulate it, the calculation amount is too large and the calculation waiting time is too long due to the excessive number of grids, which makes the Work efficiency is reduced and the progress of the project is too slow.

[0005] At present, the homogenization method and mu...

Claims

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