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

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...

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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 the part, and the shot peening process parameters are reversed. The iterative process is complicated and the amount of calculation is large. And it cannot be used to predict part deformation through different process parameters

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