Load projection and mapping method for importing press forming information to finite element simulation model

Abstract

The invention discloses a load projection and mapping method for importing press forming information to a finite element simulation model. The method includes the following steps that node force information of a sheet is positioned, projected and mapped to a die profile grid twice during press forming; load information on the die profile grid is transmitted to a model tetrahedron unit, and node action forces of the sheet are directly applied to a die so as to replace the action of the sheet on the die. The method achieves force transmission between the sheet and the die during press forming, has an important theoretical guiding significance and application value in vehicle press forming die structural analysis, belongs to the technical field of vehicles, solves the problem of how to quickly and accurately project and map the press forming information of the sheet to the finite element simulation model in the prior art, and achieves load projection and mapping between node action forces of different grid models.

Description

technical field [0001] The invention belongs to the technical field of stamping forming, in particular to a load projection mapping method for introducing stamping forming information into a finite element simulation model. Background technique [0002] As the environmental protection, safety and comfort of automobiles are paid more and more attention, the lightweight of automobiles has gradually become a new trend in the development of the automobile industry. However, the requirement of lightweight makes the performance of the steel plate material used in the car body more and more high, and the application of high-strength steel plate in the car body is also becoming more and more extensive. However, the application of high-strength steel plates has brought a series of problems to stamping production: poor formability of high-strength steel plates, serious springback, insufficient rigidity of stamping dies, more and more complex design problems, and increasing design para...

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Problems solved by technology

[0005] The invention provides a load projection mapping method for introducing stamping forming information into the finite element simulation model, aiming at solving the problem of how to quickly and accurately transfer sheet metal stamping forming information to the finite element simulation model in the prior art, and realizing different The transfer of force between mesh model nodes, so as to achieve the purpose of improving the accuracy of finite element analysis of mold structure, reducing the scale of model solution, and realizing the purpose of mold structure optimization

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