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ABAQUS-based finite element simulation method of correcting welding deformation through ultrasonic shot-peening

A technology for welding deformation and simulation methods, which is used in special data processing applications, instruments, electrical digital data processing, etc.

Inactive Publication Date: 2013-08-14
TIANJIN UNIV
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Problems solved by technology

At present, the simulation of the shot peening process is generally aimed at the test piece without initial stress, and there is no research on shot peening on the basis of welding prestress and predeformation

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  • ABAQUS-based finite element simulation method of correcting welding deformation through ultrasonic shot-peening

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Embodiment Construction

[0029] The technical solutions of the present invention will be described in detail below in conjunction with specific embodiments.

[0030] The first is the simulation of the welding process, including the simulation of the temperature field and the simulation of the stress and strain field. Using indirect coupling, the welding temperature field is calculated first, and then the temperature field is applied to the specimen as a load to calculate the welding stress field.

[0031] The simulation of the temperature field includes the following steps:

[0032] 1. Establish a geometric model and define material and section properties: the geometric size is 100mm×80mm×2mm, and the material performance parameters (including specific heat, thermal conductivity, etc.) refer to the 5A06 aluminum alloy part of the third volume of the "China Aviation Materials Handbook" performance

[0033] 2. Mesh division: DC3D8 thermal analysis unit is selected for calculation, which is an eight-no...

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Abstract

The invention discloses an ABAQUS-based finite element simulation method of correcting welding deformation through ultrasonic shot-peening. The method includes: firstly, utilizing the finite element software ABAQUS to simulate the welding process of a certain-sized aluminum alloy sheet to obtain the distribution of the welding residual stress and the deformation;and secondly, reading in a stress force and deformation grid and performing the simulative computation of a shot-peening shape correction process on the basis of the welding stress and deformation. The ABAQUS-based finite element simulation method of correcting the welding deformation through the ultrasonic shot-peening takes the limits that the complexity of mechanism of the shot-peening process and the influence of various variable factors result in great difficulties in optimizing shot-peening process parameters and the method which purely relies on experimental data and experience consumes much time and money into consideration, so that the ABAQUS-based finite element simulation method is introduced to assist the selection of the ultrasonic shot-peening process parameters and the strain of the stress and the change of the deformation are analyzed to explain the mechanism of the shape correction.

Description

technical field [0001] The invention relates to a finite element simulation method for ultrasonic shot peening to correct residual deformation of welded structures in the field of welding, more specifically, to a method for simulating ultrasonic shot peening to correct welding deformation by using Abaqus finite element simulation software. Background technique [0002] Aluminum alloys are widely used in aerospace, automobile manufacturing, ships, containers and other fields, and are recognized as ideal lightweight materials. In recent years, with the requirements for weight reduction, mechanical properties and other technical indicators of structural parts in the defense industry, a large number of lightweight structures, such as aluminum alloy welded structures, have been more and more widely used. [0003] Since welding is a local heating process, the temperature of the structure is extremely uneven, so the expansion and contraction deformation are also very different, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D1/00G06F17/50
Inventor 王东坡丁吉坤张海王颖邓彩艳
Owner TIANJIN UNIV
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