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Numerical value simulation method for spot welding connection and failure thereof

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, and it is difficult to practically apply the value, so as to avoid Effects of complexity, improved precision, and strong adaptability

Inactive Publication Date: 2009-10-21
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 value simulation method for spot welding connection and failure thereof
  • Numerical value simulation method for spot welding connection and failure thereof
  • Numerical value simulation method for spot welding connection and failure thereof

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Embodiment Construction

[0065] 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:

[0066] The first step is to determine the shape and size of the grid in the weld nugget area: the weld nugget area is composed of one or more layers of grids, and each layer is composed of...

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Abstract

A numerical value simulation method for spot welding connection and failure thereof is characterized in that according to a structural characteristic that two areas: a weld nugget zone and a thermal effect zone are classified according to different changes of material property, solid elements and shell elements are used to respectively establish a solder joint finite element model consisting of the weld nugget zone and the thermal effect zone, thus providing a pertinent execution basis for the arrangement of solder joint failure parameter. The method has the advantages of avoiding the complexity of research on the mathematic models of the solder joint, simplifying the judgment standard for solder joint simulation failure, complying with the principle of one problem with one standard, and widening functions of simulating the failure of the spot welding. The method provides specific establishment rules for forming the model elements of the solder joints, wherein the rules are suitable for automatic realization of program.

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 in the process of automobile research and development, especially for the simulation of the pull-off failure of the welding spot and the failure of the nugget of the welding spot. 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 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. [0003] The impact of spot welding failure on the simulation results mainly has two as...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 肖锋
Owner 肖锋
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