A Numerical Simulation Solution and Drawing Method of the Wrinkling Instability Limit Diagram of Plate and Shell

A numerical simulation and limit diagram technology, applied in CAD numerical modeling, electrical digital data processing, special data processing applications, etc., can solve the problems of unpredictable wrinkling and instability morphology, and many factors that cause and affect, and achieve results. High reliability, accurate calculation and high efficiency

Active Publication Date: 2022-07-29
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to many triggering and influencing factors, it is difficult to predict the critical wrinkling instability moment, wrinkling instability morphology and criticality of thin-walled components.

Method used

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  • A Numerical Simulation Solution and Drawing Method of the Wrinkling Instability Limit Diagram of Plate and Shell
  • A Numerical Simulation Solution and Drawing Method of the Wrinkling Instability Limit Diagram of Plate and Shell
  • A Numerical Simulation Solution and Drawing Method of the Wrinkling Instability Limit Diagram of Plate and Shell

Examples

Experimental program
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Effect test

Embodiment 1

[0036] like figure 1 As shown in the figure, the numerical simulation solution and drawing method for establishing the wrinkling and instability limit diagram of metal plate shell material includes the following steps;

[0037] Step 101: Obtain the conditional elements for the forming of the sheet metal shell specimen;

[0038] Step 102: establish a numerical wrinkling and instability model for the forming of the metal plate and shell test piece according to the forming condition elements of the metal plate and shell test piece;

[0039] Step 103 : establish a wrinkling limit strain solution model for the wrinkling element cluster of the sheet metal shell specimen according to the numerical wrinkling instability model;

[0040] Step 104: Determine the representation form of the wrinkling and instability limit diagram of the plate and shell according to the state type of the wrinkling and instability region of the metal plate and shell specimens;

[0041] Step 105: If the sta...

Embodiment 2

[0061] Now take the wedge-shaped member with plate thickness t=0.9mm and geometric dimension h=48mm as an example. The specific process of establishing the wrinkling limit strain solution model of wrinkling element clusters based on the numerical wrinkling instability model is described in detail.

[0062] When the metal sheet is plastically deformed, wrinkled and unstable, the inner and outer forces in the thickness direction of the wrinkle are different. The inner material is under compressive stress due to being squeezed, while the outer side is under tensile stress. Therefore, when the wrinkling position enters the critical wrinkling state from the initial steady state deformation, the strain paths corresponding to the inside and outside of the wrinkle will be bifurcated, and the moment corresponding to the bifurcation point is defined as the critical moment when the sheet begins to wrinkle.

[0063] In the tensile numerical simulation results of wedges, the extreme point...

Embodiment 3

[0068] In this example, the YBT test is taken as the research object, and the process of establishing the wrinkling and instability limit diagram of the metal plate and shell in the type I characteristic form is described in detail by applying the numerical simulation solution and drawing method of the wrinkling and instability limit diagram of the plate and shell of the present invention.

[0069] The numerical simulation model of YBT test stretch forming based on the YBT test stretch forming condition elements in this example is shown in Figure 4 , the plate is a deformable body, and the material properties are based on the GB / T 228.1-2010 test standard for the size design and blanking of the uniaxial tensile test piece for the 304 stainless steel plate, and the WDW-100kN high and low temperature microcomputer controls the electronic universal material experiment. The test was divided into three groups to test the true stress-strain curves of the specimens in the directions ...

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Abstract

The invention discloses a numerical simulation solution and drawing method for a wrinkling and instability limit diagram of a plate and shell, and relates to the technical field of plastic processing of metal plates. According to the numerical wrinkling instability model established by the numerical wrinkling instability model of the metal plate and shell specimen forming condition elements; The state type of the wrinkling and instability region of the shell specimen is used to determine the characterization form of the wrinkling and buckling limit diagram of the shell. Establish the wrinkling and instability limit diagram of the plate and shell. The invention accurately predicts the wrinkling and instability of plate and shell materials, has simple operation, energy saving and environmental protection, high efficiency, accurate calculation, intuitive calculation process and high reliability of results, and can be widely used in engineering practice.

Description

technical field [0001] The invention relates to the technical field of plastic processing of metal plates, in particular to a numerical simulation solution and drawing method for a wrinkling and instability limit diagram of a plate and shell. Background technique [0002] With the rapid development of aerospace, aviation, national defense, automobile and other manufacturing technology fields, the requirements for product lightweight, toughness and forming accuracy are getting higher and higher, and lightweight thin-walled parts have been increasingly used in various industrial fields. more applications. However, in the forming process of lightweight thin-walled parts, forming defects such as wrinkling, cracking, and springback often occur. Among them, wrinkling, as one of the main instability defects in the plastic forming process of metal thin-walled parts, has become more and more The more common it is, it will not only seriously affect the quality and accuracy of the for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/23G06F111/04G06F111/10G06F119/14
CPCG06F30/17G06F30/23G06F2111/04G06F2111/10G06F2119/14
Inventor 杜冰宋鹏飞谢军李晗赵翀昊
Owner YANSHAN UNIV
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