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Shot peening strengthening treatment process parameter determination method based on finite element analysis

A processing technology and shot peening technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., to save manpower and material resources and increase practicability

Inactive Publication Date: 2015-04-01
滁州汽车与家电技术及装备研究院 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is still a lack of related methods to optimally design the parameters of the shot peening process

Method used

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  • Shot peening strengthening treatment process parameter determination method based on finite element analysis
  • Shot peening strengthening treatment process parameter determination method based on finite element analysis
  • Shot peening strengthening treatment process parameter determination method based on finite element analysis

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Embodiment Construction

[0033] The method for determining the process parameters of shot peening treatment based on finite element analysis in this embodiment is performed as follows:

[0034] Step 1: Build a finite element model

[0035] Use the material properties of the projectile and the material to be sprayed to establish a local finite element model for the projectile and the material to be sprayed, simulate the entire shot peening process with the local finite element model, and use non-reflective boundary conditions, symmetry planes and fixed constraints to reduce the effect of the boundary on the simulation The material properties of the projectile and the sprayed material are characterized by material parameters, which refer to the Young’s modulus, Poisson’s ratio, density, yield strength and tangent modulus of the projectile and the sprayed material.

[0036] Such as Figure 1a and Figure 1b As shown, the local finite element model includes four layers of projectiles 1 with a radius of R, and a r...

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Abstract

The invention discloses a shot peening strengthening treatment process parameter determination method based on finite element analysis. The shot peening strengthening treatment process parameter determination method based on the finite element analysis is characterized in that a local finite element model of a pellet and a shot-peened material is built by utilizing the material properties of the pellet and shot-peened material; the finite element analysis is carried out by setting different technological parameters, so that the maximum average stress is obtained, and an optimal regression equation is produced by utilizing a regression analysis method; the shot peening strengthening treatment process parameter is determined through the optimal regression equation. According to the shot peening strengthening treatment process parameter determination method, the change rule of the residual internal stress along with the layer depth under different parameters and the distribution situation of the residual stress is found by researching the internal relation between the shot peening strength and the shot peening process parameter, so as to scientifically and reasonably determine the shot peening process parameter according to the requirement on shot peening strength.

Description

Technical field [0001] The invention relates to the technical field of shot peening, in particular to a method for determining process parameters of shot peening treatment based on finite element analysis. Background technique [0002] Shot peening is an effective method of strengthening the surface deformation of metal parts. It is one of the effective ways to improve the fatigue life of workpieces. It has the characteristics of convenient implementation, significant effects, wide adaptability and low consumption. It is widely used in aviation and military industries. , Automotive and other fields. [0003] The selection of the existing shot peening process parameters mostly relies on experience and test shot experiments to make multiple SN curves for comparison. The SN curve uses the fatigue strength of the material standard specimen as the ordinate, and the logarithmic value of the fatigue life lg N as the abscissa. , The curve representing the relationship between the fatigue ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 赵韩朱仁胜张月周隐孙程刘四洋沈健
Owner 滁州汽车与家电技术及装备研究院
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