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High-energy shot blasting surface hardness numerical simulation method

A surface hardness and numerical simulation technology, which is applied in CAD numerical modeling, electrical digital data processing, special data processing applications, etc., can solve the problems that the surface hardness simulation method has not been reported yet.

Active Publication Date: 2020-12-18
BEIHANG UNIV
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Problems solved by technology

[0003] At present, the research on surface hardness is carried out by means of experimental testing, and the effective simulation method of surface hardness caused by high-energy shot peening has not been reported yet.

Method used

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  • High-energy shot blasting surface hardness numerical simulation method
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  • High-energy shot blasting surface hardness numerical simulation method

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Embodiment Construction

[0026] The technical scheme of a high-energy shot peening surface hardness numerical simulation method of the present invention will be further described below by way of example in conjunction with the accompanying drawings. The research material in this example is nickel-based superalloy GH4169.

[0027] Such as figure 1 Shown, the concrete realization process of the present invention is as follows:

[0028] The first step is to obtain the dislocation evolution model parameters based on the stress-strain data at high strain rates, establish the dislocation evolution model of the material to be studied, and correlate the grain size, dislocation density and macroscopic stress-strain; the stress-strain data at high strain rates can be It can be obtained by carrying out the Hopkinson compression bar test under high strain rate or according to the established high strain rate constitutive model of the material to be studied, such as the J-C model. This example takes the J-C mode...

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Abstract

The invention relates to a high-energy shot blasting surface hardness numerical simulation method which comprises the following steps: (1) acquiring dislocation evolution model parameters based on stress-strain data under a high strain rate, establishing a dislocation evolution model of a to-be-studied material, and associating grain size, dislocation density and macroscopic stress-strain; (2) acquiring strength model parameters, establishing a strength model of the to-be-researched material, and associating the strength with the grain size; (3) acquiring parameters in the strength and hardness relationship based on the test data, establishing the strength and hardness relationship of the to-be-researched material, and associating the surface hardness with the strength; (4) conducting programming by using a VUSDFLD subprogram of ABAQUS finite element software, and establishing a relationship between the surface hardness and macroscopic parameters based on the relationship among the dislocation evolution model, the strength model and the strength and hardness to complete programming; and (5) conducting shot peening strengthening numerical simulation based on ABAQUS software, and obtaining surface hardness distribution after strengthening.

Description

technical field [0001] The invention relates to a numerical simulation method for surface hardness of materials in a high-energy shot peening process, which can accurately simulate surface hardness changes of surface materials due to huge plastic deformation, and belongs to the technical field of aerospace engines. Background technique [0002] In the process of high-energy shot peening, due to the collision of the surface of the sprayed material with high-speed projectile flow, the surface morphology is changed and controllable plastic deformation occurs. Compared with the ordinary shot peening process, the high-energy shot peening process has higher shot energy, better surface morphology, and more significant strengthening effect. It has broad application prospects in the industry, especially aero-engine parts. Generally speaking, the strengthening effect introduced by high-energy shot peening includes two aspects: stress strengthening and tissue strengthening. On the one ...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F111/10G06F119/14
CPCG06F30/23G06F2111/10G06F2119/14Y02P90/30
Inventor 王荣桥胡殿印田腾跃
Owner BEIHANG UNIV
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