Numerical simulation method for prestressed shot blasting forming of ribbed wallboard

Abstract

The invention relates to a numerical simulation method for prestressed shot blasting forming of a ribbed wallboard. The numerical simulation method comprises the following steps: step 1, establishingan association model of shot blasting simulation parameters corresponding to input shot blasting process parameters and output shot blasting process parameters of the ribbed wallboard; 2, establishinga multi-shot impact model of the ribbed wall plate, enabling the surface of the model to be impacted by multiple shots, creating a path of a shot blasting area along the thickness direction of the model, and obtaining path node stress; and 3, establishing a reverse bending stress field method simulation model of the ribbed wall plate, converting the wall plate into a finite element shell unit according to geometric and stress characteristics of the wall plate, carrying out partition processing, and endowing a stress field to the shell unit to carry out simulation deformation calculation. According to the invention, shot blasting forming stress field method numerical simulation based on shot blasting induced stress is creatively achieved, and the prestressed shot blasting forming effect ofthe ribbed wall plate is greatly improved.

Description

technical field [0001] The invention relates to the technical field of shot peening, in particular to a numerical simulation method for prestressed shot peening of ribbed wall panels. Background technique [0002] Shot peening is one of the main forming processes for metal wing panels. This technology was first proposed by Jim Bogle, an engineer of Lockheed Martin Corporation, in the 1940s. Since then, it has been mostly used for aerospace vehicle panel workpieces. manufacturing. At present, the free-state shot peening technology has been successfully applied in the manufacture of aircraft wall panels such as ARJ21 and C919 in my country. [0003] At this stage, the determination of shot peening process parameters mainly depends on experiments and experience. The test volume is large, the cycle is long, the efficiency is low, and the cost is high. Therefore, the numerical simulation of shot peening has emerged as the times require. field law, etc. The temperature field me...

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Problems solved by technology

The research objects of the numerical simulation of prestressed shot peening mainly focus on flat parts, and the research on the numerical simulation of prestressed shot peening of integral wall panels with ribs has not been reported yet.

At the same time, the current thinking and method of stress field method simulation cannot establish the correlation between simulation parameters and process parameters, so this method can only perform qualitative simulation, and it is also unable to perform quantitative simulation on prestressed shot peening of ribbed integral wall panels. It is difficult to apply in the model development of complex and ribbed integral wall panels

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