Crystal plasticity finite element modeling simulation method

A technology of crystal plasticity and simulation method, applied in the direction of design optimization/simulation, special data processing applications, instruments, etc., can solve the problems of complex procedures and many steps, and achieve the effect of realizing process flow and reducing manual operation process.

Pending Publication Date: 2022-01-28
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

This modeling method needs to convert between various software and scripts, with many steps and complicated procedures

Method used

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  • Crystal plasticity finite element modeling simulation method
  • Crystal plasticity finite element modeling simulation method
  • Crystal plasticity finite element modeling simulation method

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Embodiment Construction

[0022] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments.

[0023] Such as figure 1 As shown, a kind of crystal plasticity finite element modeling and simulation method of the present invention obtains grain information based on EBSD analysis; the (ctf format) file containing grain information such as Euler angles generated by EBSD analysis is imported in the open source software Dream.3D , realize the automatic reconstruction of the grain structure, and output the input file containing only the geometric information of the ABAQUS finite element analysis software model nodes, units, etc., as well as the geometric orientation data of each grain; Grain average geometric orientation information; use Python script to combine grain average geometric orientation information with the input file representing the geometric model to generate a complete input file with geometric model information and material property info...

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Abstract

The invention discloses a crystal plasticity finite element modeling simulation method. The method comprises the following steps of acquiring grain information based on EBSD analysis; importing a ctf format file generated by EBSD analysis into Drem.3D software to realize automatic reconstruction of a crystal grain structure, and outputting an input file and geometric orientation data of each crystal grain; processing the grain geometric orientation data through a Python language script to obtain average geometric orientation information of each grain; combining the grain average geometric orientation information with the input file by using a Python script to generate a complete input file with geometric model information and material attribute information; giving boundary conditions to the model in ABAQUS finite element analysis software, and setting a constitutive relation of the model by utilizing a UMAT subprogram, so that the whole crystal plasticity finite element analysis process is realized. The process of crystal plastic finite element modeling and simulation analysis is realized.

Description

technical field [0001] The invention relates to a crystal plastic finite element modeling and simulation method based on electron backscattering diffraction analysis (EBSD), Dream.3D software and ABAQUS finite element analysis software, belonging to the field of mechanical structure strength mesoscopic modeling and analysis methods Background technique [0002] Aeroengine components, especially the blades and disk components, have to experience high-cycle alternating loads and high-temperature working environments during long-term use. These factors lead to very serious fatigue failure of aero-engine rotor components. The initiation and propagation of fatigue cracks are closely related to the microscopic grain structure of the material. Therefore, it is necessary to study the initiation and propagation of material fatigue cracks at the microscopic grain level. [0003] At present, scholars at home and abroad have conducted a lot of research on the mechanical properties of ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06F30/23G16C60/00
CPCG06F30/17G06F30/23G16C60/00
Inventor 江荣赵阳章文天张禄贾旭宋迎东
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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