A Modeling Method for Forced Deformation of Highly Flexible Insulation Materials
A technology of insulation, heat insulation and force deformation, which is applied in the direction of applying stable tension/pressure to test the strength of materials, etc. It can solve the problems of unloading energy loss, large influence on the size of formed parts, and complex working conditions of materials, etc., to achieve low cost Effect
Active Publication Date: 2017-01-11
BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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Problems solved by technology
However, due to the high flexibility of this material, the relationship between the force and deformation of the material is complex, showing the characteristics of high nonlinearity, unloading energy loss, etc.; and the material has a large amount of force and deformation, resulting in the impact of the stressed cushion material on the size of the formed part. features
At the same time, during the use of the cushion material, the electrical contact, thermal influence, and load coupling effect make the working conditions of the material extremely complicated. Therefore, it becomes very difficult to determine the influence of the cushion deformation on the size of the formed part
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[0028] Attached below Figure 1-5 The present invention is described in detail with specific examples.
[0029] The invention provides an engineering analysis method for stress deformation of highly flexible insulating and heat-insulating materials, the process of which is as follows figure 1 shown. The steps of the present invention are as follows:
[0030] Step 1: Kaowool Paper is selected as the highly flexible insulation material, and the compression test equipment is LR30K testing machine from Ametek Company, and the compression test standard follows GB / T7757-93. The thickness of the compressed sample is 6mm, and the diameter of the sample is Φ=52.5mm, see figure 2 (a). The speed control of the compression test is 10±2mm / min, see the working part of the compression test figure 2 (b).
[0031] Step 2: Draw the stress-strain curve of Kaowool material according to the unidirectional compression test data with the aid of drawing Origin software, see image 3 , where ...
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Abstract
The invention provides a method for modeling stress deformation of a high-flexibility insulating material. The method comprises the following steps: (1) performing standard single-direction compression test of the high-flexibility insulating material on a press tester; (2) drawing a stress-strain constitutive curve, and performing curve analysis; (3) selecting a proper constitutive equation for modeling, and determining the parameter of the high-flexibility insulating material by fitting; (4) calculating the deformation of the high-flexibility insulating material in a stress state according to an interpolation-extrapolation method; (5) making an engineering judgment: if the calculated result in the step (4) is inconsistent with the engineering practice, returning to the second step, analyzing the curve once again, selecting a function, identifying the material parameter, and calculating; if the calculated result is consistent with the engineering practice, entering a next step; and (6) performing engineering application and popularization. An engineering modeling method is provided for the stress deformation of the high-flexibility insulating material.
Description
technical field [0001] The present invention relates to a method for calculating the force deformation of highly flexible insulating materials at room temperature and high temperature. Specifically, it relates to the unidirectional compression test of highly flexible insulating materials, material constitutive modeling, material parameter verification and engineering applications. It belongs to the technical field of material processing. Background technique [0002] Highly flexible insulation materials are widely used as cushions in advanced thermoforming due to their high-temperature stability, flexibility, insulation, heat insulation, and many other advantages. Especially in current-assisted forming, due to the insulation of the blank and the mold, a highly flexible insulating material is often used. However, due to the high flexibility of this material, the relationship between the force and deformation of the material is complex, showing the characteristics of high non...
Claims
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IPC IPC(8): G01N3/08
Inventor 肖军杰李东升续明进程光耀李宏峰
Owner BEIJING INSTITUTE OF GRAPHIC COMMUNICATION