Finite element prediction system for welding and solidifying crack in virtual environment

A technology for solidification cracks and prediction systems, applied in welding equipment, material defect testing, instruments, etc., can solve problems such as difficult application, limited application of finite element numerical simulation technology, and difficulty in implementation.

Inactive Publication Date: 2009-11-04
HARBIN INST OF TECH
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

Numerical simulation of solidification crack driving force involves theoretical knowledge of welding structure, welding metallurgy, material heat transfer, finite element analysis, subroutine development and graphics and image processing, which is difficult for ordinary welding engineers
[0006] 2. The current finite element calculation software is generally general-purpose software imported from Western developed countries such as Europe and the United States, and is not...

Method used

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  • Finite element prediction system for welding and solidifying crack in virtual environment
  • Finite element prediction system for welding and solidifying crack in virtual environment
  • Finite element prediction system for welding and solidifying crack in virtual environment

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specific Embodiment approach 1

[0026] Specific implementation mode one: combine Figure 1-10 To illustrate this embodiment, the finite element prediction system for welding solidification cracks in the virtual environment described in this embodiment is composed of a pre-processing subsystem 1, a post-processing subsystem 2, and a solidification crack prediction subsystem 3;

[0027] The pre-processing subsystem 1 is composed of an interface operation module 1-1, an MSC.Marc interface file module 1-2, a subroutine.f file module 1-3 and a calling MSC.Marc software execution calculation module 1-4;

[0028] Post-processing subsystem 2 is composed of MSC.Marc software calculation result processing module 2-1, MatrixVB function module 2-2, Matlab software module 2-3 and graphic display module 2-4;

[0029] The solidification crack prediction subsystem 3 is composed of a resistance curve transfer module 3-1, a judgment module 3-2 and a result output module 3-3;

[0030]The interface operation module 1-1 is used...

specific Embodiment approach 2

[0032] Specific implementation mode two: combination figure 1 and figure 2 This embodiment is described. The difference between this embodiment and the first embodiment is that the interface operation module 1-1 is a Chinese interface operation module. Such setting is convenient for ordinary technicians who can only speak Chinese to operate.

specific Embodiment approach 3

[0033] Specific implementation mode three: combination figure 2 This embodiment is described. The difference between this embodiment and the specific embodiment 1 is that the parameter structure for predicting welding solidification cracks that can be selected by the user in the prediction system is model size parameters, grid parameters, material parameters, initial Conditions, boundary conditions, welding parameters, welding heat source model parameters. According to the parameters entered by the user, the system automatically completes the creation of interface files and subroutines according to the format of the respective files, and automatically submits them, and realizes the numerical simulation calculation of the temperature field and stress / strain field of welding solidification cracks.

[0034] Model size parameters: The system provides three types of joints: butt joints, corner joints and T-joints. The parameters that need to be input are the length, width and thi...

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Abstract

The invention provides a finite element prediction system for welding and solidifying a crack in virtual environment, which relates to the technical field of finite element prediction software for welding and solidifying a crack, and the complex simulation and the prediction processes of welding and solidifying a crack are simplified into the simple operation and settings of an interface. A preliminary processing subsystem comprises an interface operating module, an MSC.Marc interface document module, a subprogram.f file module and an invocation MSC.Marc software executing and computing module, and a post processing subsystem comprises a MSC.Marc software computed result processing module, a MatrixVB function module, a Matlab software module and a graphic display module; a solidified crack predicting subsystem comprises a resistivity curve loading module, a judgment module and a result output module. The application of the invention enables a common welding engineering technician to carry out the numerical simulation and prediction for welding and solidifying a crack; the computed result is processed, and the storage space of a result file is decreased; the result file is converted into a file format convenient for graphic display, and the computed results of a temperature field and a stress strain field are visually displayed in a graphic form.

Description

technical field [0001] The invention relates to the technical field of finite element prediction software for welding solidification cracks, in particular to a finite element prediction system for predicting welding solidification cracks in a computer-built virtual environment. Background technique [0002] Welding solidification crack is one of the most harmful defects in the hot forming process of metal materials. The existence of solidification cracks in welded components not only affects product quality and reduces service life, but may also cause catastrophic accidents. Therefore, for a long time, researchers at home and abroad have been exploring the formation mechanism, metallurgical / mechanical behavior and quantitative description of the cracking process of welding solidification cracks. [0003] In recent years, numerical simulation has received more and more attention, and has been widely used in theoretical research and practical applications in the field of weld...

Claims

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Application Information

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IPC IPC(8): G06F17/50B23K31/12G01N25/72
Inventor 董志波魏艳红占小红马瑞胡广旭
Owner HARBIN INST OF TECH
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