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Numerical Simulation Method for Spot Welding and Its Failure

A numerical simulation and spot welding technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems that the welding spot model grid does not consider the feasibility of engineering application, it is difficult to practical application value, etc., to improve The effect of precision and strong adaptability

Inactive Publication Date: 2011-12-21
肖锋
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Problems solved by technology

This literature expands the thinking for the study of spot welding simulation, but the processing of the grid of the solder joint model basically does not consider the feasibility of engineering applications, and the determination of the plastic strain at failure itself comes from the failure simulation of the solder joint test, which is logically questionable. It is difficult to have practical application value in engineering practice

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  • Numerical Simulation Method for Spot Welding and Its Failure
  • Numerical Simulation Method for Spot Welding and Its Failure
  • Numerical Simulation Method for Spot Welding and Its Failure

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Embodiment Construction

[0066] The specific construction scheme of the solder joint model of the present invention is: according to the structural characteristics of the solder joints divided into two regions, the nugget area and the heat-affected zone due to the change of material properties, the volume grid and the shell grid are used to establish the structure of the weld joint model. The solder joint finite element model composed of the nuclear area and the heat-affected zone provides a targeted implementation basis for the setting of solder joint failure parameters. This method also proposes specific construction rules for the formation of the solder joint model grid, which is suitable for The programming is automatically realized, and the specific steps for establishing the solder joint model are as follows: the first step, the weld nugget area is composed of one or more layers of grids, and each layer contains four volume grids, and its top-view boundary is octagonal; the weld nugget area The d...

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Abstract

A numerical simulation method for spot welded connections and their failures. Its characteristic is that according to the structural characteristics of the weld joints, which are divided into two regions, the weld nugget zone and the heat-affected zone due to the change of material properties. The finite element model of solder joints provides a targeted implementation basis for the setting of solder joint failure parameters. Its advantages are that it avoids the complexity of the research on the mathematical model of the solder joints, simplifies the standard for judging the failure of the solder joint simulation, follows the principle of the same standard for the same problem, and expands the function of the spot welding failure simulation. This method proposes a specific construction rule for the formation of the solder joint model grid, which is suitable for automatic programming.

Description

technical field [0001] The invention relates to: a numerical simulation method for spot welding connection and its failure by using a finite element model, especially for the simulation of the pull-off failure of the solder joint and the failure of the nugget of the solder joint. Background technique [0002] Spot welding is one of many welding processes, just like laser welding and fusion welding, and spot welding refers to the resulting shape produced by the spot welding process. In this article, spot welding can sometimes refer to spot welding. There are two main failure modes of spot welding: Pullout failure and Interfacial failure. The former refers to the tearing of the material in the Heat Affected Zone of the solder joint along the entire circumference of the Nugget. The phenomenon that the weld nugget remains intact; the latter refers to the phenomenon that the joint surface of the weld nugget is separated and the heat-affected zone and the base metal are not torn. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 肖锋
Owner 肖锋
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