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A Finite Element Nodal Modeling Method Considering Contact Surface Topography

A technology of contacting surfaces and modeling methods, applied in the field of assembly and fastening, can solve problems such as poor mesh accuracy, lost data, and increased difficulty in mesh division, and achieves improved calculation accuracy, improved rigor, and improved calculation accuracy. The effect of not being too slow

Active Publication Date: 2021-04-30
DALIAN UNIV OF TECH
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Problems solved by technology

This method not only cannot accurately show the proper shape characteristics, but also increases the difficulty of meshing the model during the interaction process of the software, and the mesh accuracy is poor, and there is a possibility of data loss.

Method used

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  • A Finite Element Nodal Modeling Method Considering Contact Surface Topography
  • A Finite Element Nodal Modeling Method Considering Contact Surface Topography
  • A Finite Element Nodal Modeling Method Considering Contact Surface Topography

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Embodiment Construction

[0050] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0051] A finite element modeling method considering contact surface topography, comprising the following steps:

[0052] Step 1, most mechanical surface contact behaviors can be approximately characterized by the contact of two flat plates. The present invention uses two flat plates as an example to illustrate and establish a three-dimensional model of two flat plates in co...

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Abstract

The invention belongs to the technical field of assembly and fastening, and provides a finite element node modeling method considering the contact surface topography. First, establish a 3D model and carry out fine-grained grid division, and then add single-scale or multi-scale, random distribution or periodic distribution shape functions to the contact surface according to the needs of the model, change the height coordinate matrix of the contact surface nodes, and regenerate the contact surface with shape model. While proposing a modeling method, the present invention pays attention to grid area division, and ensures the number of grid nodes while implementing surface topography addition, so as to ensure that the calculation speed will not be too slow.

Description

technical field [0001] The invention belongs to the technical field of assembly and fastening, and in particular relates to a finite element node modeling method considering contact surface topography. Background technique [0002] All kinds of machinery are assembled from various parts, and the surfaces that cooperate with each other are called mechanical joint surfaces. Due to the randomness and disorder of the machined surface, the contact characteristics of the mechanical joint surface will appear obvious nonlinear characteristics during the assembly process. Therefore, it is an essential part to study and optimize the assembly process to conduct mechanism research and simulation analysis on the contact behavior of the mechanical interface. For the study of the surface topography of the bonding surface, it is the current mainstream method to conduct contact analysis with finite element simulation, and the accuracy of the model depends on the mesh accuracy and modeling m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F30/17G06T17/00
CPCG06T17/00
Inventor 马跃刘瑞起张伟侯博文
Owner DALIAN UNIV OF TECH
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