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Establishing method of constructive model for rolling simulation of GH4169 materials

A GH4169, constitutive model technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as large deformation and affecting the accuracy of numerical simulation

Active Publication Date: 2014-02-26
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the general plastic forming process, the deformation is relatively large, and the use of inaccurate material models will seriously affect the accuracy of numerical simulation

Method used

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  • Establishing method of constructive model for rolling simulation of GH4169 materials
  • Establishing method of constructive model for rolling simulation of GH4169 materials
  • Establishing method of constructive model for rolling simulation of GH4169 materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0054] 1) Monotonic tensile test of GH4169 alloy

[0055] In order to obtain the monotonic tensile properties of GMl69 alloy at room temperature, the material was taken from the cold-drawn bar of GH4169 alloy, and processed into standard tensile specimens of φ8mm and φ5mm for static tensile experiments. The experimental conditions are shown in Table 1.

[0056] Table 1 Experimental Conditions of Tensile Experiment

[0057] Experimental conditions

Tensile test one

Tensile test two

Sample size

Φ8mm

Φ5mm

Strain rate

4.8mm / min, 3.2mm / min, 1.6mm / min

3mm / min, 2mm / min, 1mm / min

temperature

room temperature

room temperature

Strain range

Stretch until the specimen breaks

Stretch until the specimen breaks

Laboratory equipment

WDS-100 electronic universal testing machine

AG-IS50kN universal testing machine

[0058] 2) Low cyclic strain controlled symmetric loading experiment of GH4169 all...

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Abstract

The invention discloses an establishing method of a constructive model for rolling simulation of Gh4169 materials. The method comprises the following steps of 1) GH4169 alloy monotonic tensile test; 2) GH4169 alloy low-cycle strain control symmetric loading test; 3) constructive model parameter identification including selecting a Yoshida-Uemori model and obtaining constructive model parameters through software computation; 4) model verification including after finishing secondary development of a material constructive model, verifying the material constructive model through a cuboid forging process. The establishing method of the constructive model for rolling simulation of the GH4169 materials has the advantages that the constructive model established through the method can accurately represent the stress-strain of deformed GH 4169 materials and really reflect the flow stress change of metal. The method can provide accurate material models for numerical simulation software, improve the accuracy of simulation results and have significance to material deformation characteristic analysis and forming process optimization.

Description

technical field [0001] The invention relates to the technical field of aviation processing, in particular to a method for establishing a material constitutive relation model during roll forming. Background technique [0002] The constitutive relationship is the relationship between stress and strain as the material deforms. The constitutive model of materials is an indispensable basic theoretical model in the process of plastic deformation, and the calculation accuracy of the model directly affects the calculation results of numerical simulation. Most of the finite element software provide the flow stress change model of the material in a certain range of temperature, strain and strain rate, and then calculate the flow stress model of the material in other temperature, strain and strain rate ranges by interpolation and extrapolation methods. In fact, the flow stress model of most materials varies greatly in different temperature, strain and strain rate ranges, and the calcu...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 佗劲红李治华孔祥伟邰清安吴会萍
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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