Equivalent shot peening numerical simulation method based on temperature field

Abstract

The invention relates to an equivalent shot peening numerical simulation method based on a temperature field, belonging to the shot peening molding field. The method includes establishing the temperature field model of panel parts and single projectile impact model; the temperature field model includes a uniform temperature field and a temperature gradient. The depth of temperature gradient is thethickness of equivalent plastic layer, and the width of temperature gradient is the width of effective narrow band of shot peening. The equivalent plastic layer is obtained from the single projectilemodel. In the single projectile model, different shot peening parameters correspond to different equivalent plastic layers. Loading the temperature field of the flat blank according to the planned shot peening path; the bending effect of the temperature field model can be verified by shot peening experiments. The invention has the advantages of greatly shortening the numerical simulation calculation time, rapidly calculating the overall effect of shot peening molding, and formulating the shot peening process optimization scheme, so that the trial and error methods commonly used in actual production can be avoided to a large extent.

Description

technical field [0001] The invention relates to the field of shot peening, in particular to an equivalent shot peening numerical simulation method based on a temperature field. Background technique [0002] Because shot peening does not require forming molds, it is suitable for various complex curvature parts, and the residual stress after forming can strengthen the surface of parts. It is widely used in the manufacture of modern aircraft integral panel parts. At present, this process has become the preferred forming method for manufacturing wing panels at home and abroad. [0003] The macro effect of the shot peening process is actually formed by the accumulation of a large number of shot peening impacts. In the process of the shot peening process, the macro effect of the shot peening is what we pay most attention to. In the numerical simulation method of the shot peening process, in order to obtain the macroscopic deformation, the most intuitive idea is to calculate the i...

AI Technical Summary

Problems solved by technology

The biggest defect of this numerical simulation method is that under the existing numerical calculation conditions, the simulation process is sequentially extrapolated from a single shot peening action, and the actual number of shot peening required for the actual parts is huge, making the entire analysis and simulation process difficult. The amount of calculation and cost are unacceptable

The second defect of this method is that the model does not consider a series of practical issues such as the collision between projectiles, which makes the calculation results unreliable and the accuracy is not very high.

Therefore, it is impractical to apply this method to the actual production process