Finite element simulation method for shot-peening strengthening deformation based on ABAQUS

A shot peening, simulation method technology, applied in special data processing applications, instruments, electrical digital data processing and other directions, can solve the problems of predicting part deformation, complex repeated iteration process, large amount of calculation, etc., to achieve low cost and application effect. good, accurate results

Active Publication Date: 2015-08-26
NORTHWESTERN POLYTECHNICAL UNIV +1
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Problems solved by technology

However, this method does not better establish the relationship between the shot peening process parameters and the deformation of the part. The temperature field can only be adjusted repeatedly through the target shape of th

Method used

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  • Finite element simulation method for shot-peening strengthening deformation based on ABAQUS
  • Finite element simulation method for shot-peening strengthening deformation based on ABAQUS
  • Finite element simulation method for shot-peening strengthening deformation based on ABAQUS

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Example Embodiment

[0030] This embodiment is a finite element simulation method of shot peening deformation based on ABAQUS.

[0031] refer to Figure 1 ~ Figure 4 , the part in this embodiment is a kind of aircraft flange part, the main load-bearing structural part of the butt joint of the central wing and the outer wing. The structure of this part is complex and the process is difficult. The assembly butt joint has a key influence, and the material of the edge part is 2026-T3511 aluminum alloy.

[0032] (1) Finite element simulation of shot peening residual stress

[0033] In the ABAQUS dynamic display analysis, the impact load generated during the collision between the projectile and the surface of the sprayed test piece is simulated by defining the initial velocity of the projectile, and the Coulomb friction model is used to describe the contact between the projectile and the sprayed test piece. The tangential motion between the two contact surfaces is reduced to make the calculated result...

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Abstract

The invention discloses a finite element simulation method for shot-peening strengthening deformation based on ABAQUS. The method comprises the following steps: during the ABAQUS dynamic display, establishing a shot-peening strengthening residual stress finite element model through a shot impacting method; simulating by using the shot impacting method, so as to obtain the residual stress distribution under different shot-peening processing parameters; then, taking the stress distribution result as an equivalent load to be input to the shot-peening strengthening finite element model in a manner of initial stress, and using a user subprogram SIGINI provided by the finite element software ABAQUS to define an initial stress field during the inputting process, wherein the subprogram can define the initial stress in a specific area of the finite element model; solving the initial stress by adopting a static resolver of the ABAQUS after the initial stress is defined, so as to obtain the deformation situation of a component under the action of the given initial stress. The finite element simulation method provided by the invention lays the foundation of the optimization of processing parameters, has the characteristics of being quick, low in cost, simple, convenient, feasible, and accurate in computation, and is excellent in practical engineering application effect.

Description

technical field [0001] The invention relates to the technical field of shot peening finite element simulation technology, in particular to a finite element simulation method for shot peening deformation based on ABAQUS. Background technique [0002] Shot peening technology is a simple and effective material surface strengthening method, which is mainly used to improve the fatigue resistance and fatigue life of metal parts, and improve the strength and hardness of the material surface. The basic principle of shot peening is to use the high-speed moving projectile flow to hit the surface of the metal material to cause plastic deformation on the surface of the material, generate residual compressive stress, and significantly improve the fatigue resistance, surface strength, stress corrosion resistance and high temperature oxidation resistance of the material. It is widely used in aviation and aerospace fields. However, while the shot peening technology brings many of the above...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 孙宝龙王永军肖旭东张炜高国强夏明莉肖静怡王治国
Owner NORTHWESTERN POLYTECHNICAL UNIV
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