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Finite element analysis method for stress-strain relationship of sofa seat surface elastic material

A stress-strain, elastic material technology, applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve the problems of lack of analysis methods, few studies on stress-strain relationship, etc., and achieve the effect of high prediction accuracy

Pending Publication Date: 2021-12-17
XILINMEN FURNITURE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the field of seat comfort, more attention is paid to the compression yield of single-layer polymer foam under uniaxial or multi-axial conditions, and the stress-strain relationship of multi-layer polymer foam or polymer foam with fabric combination There are not many studies, and there is a lack of a simple and practical analysis method

Method used

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  • Finite element analysis method for stress-strain relationship of sofa seat surface elastic material
  • Finite element analysis method for stress-strain relationship of sofa seat surface elastic material
  • Finite element analysis method for stress-strain relationship of sofa seat surface elastic material

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Embodiment

[0056] Embodiment: the finite element analysis method of the stress-strain relation of sofa seat surface elastic material, as figure 1 shown, proceed as follows:

[0057] S1. Based on the Ogden foam constitutive model of Ansys Workbench, the nonlinear least squares method is used to fit the stress-strain relationship of the single-layer polymer foam in the uniaxial compression test, and the test parameters of the single-layer polymer foam are obtained; among them, the polymer The foams are polyether polyol foams (density 38kg / m 3 、25kg / m 3 ) and polyurethane foam (density 38kg / m 3 ), the size of the single-layer polymer foam specimen is selected as 740mmx740mmx100mm, and the single-layer polyether polyol foam with a density of 38kg / m3 is named Foam A, and the single-layer polyether polyol foam with a density of 25kg / m3 is named Foam B The single-layer polyurethane foam with a density of 38kg / m3 is named Foam C.

[0058] Specifically, in the Ogden foam constitutive model of...

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Abstract

The invention discloses a finite element analysis method for a stress-strain relationship of a sofa seat surface elastic material, which comprises the following steps: S1, fitting the stress-strain relationship of single-layer polymer foam in a uniaxial compression test by applying a nonlinear least square method on the basis of an Ansys Workbench Ogden foam constitutive model to obtain test parameters of the single-layer polymer foam; s2, on the basis of an Ansys Workbench Ogden constitutive model, fitting a stress-strain relationship of the single-layer fabric to obtain test parameters of the single-layer fabric; and S3, according to the test parameters of the single-layer polymer foam and the test parameters of the single-layer fabric, utilizing finite element simulation to predict the stress-strain relationship of the combination of the polymer foam and the fabric. The invention can effectively predict the stress-strain relationship of the sofa seat surface elastic material combination so as to facilitate subsequent improvement and optimization of the sofa seat surface elastic material, and has the advantages of being simple and practical.

Description

technical field [0001] The invention relates to the field of sofa performance testing, in particular to a finite element analysis method for the stress-strain relationship of an elastic material on a sofa seat surface. Background technique [0002] The comfort of the sofa seat is closely related to the combination of its elastic materials. For a long time, sofa companies and designers have mainly relied on uniaxial compression test analysis and worker experience when choosing elastic materials. However, there are many types of elastic materials on the market, such as polymer foams, springs, bandages, fabrics, etc., and it is difficult to systematically quantify the stress-strain relationship of a large number of elastic material combinations only by relying on traditional uniaxial compression experiments. In recent years, the finite element analysis method has been widely used in the simulation of engineering mechanics due to its advantages of intuition and timeliness. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F113/12G06F119/14
CPCG06F30/23G06F2119/14G06F2113/12
Inventor 胡玲玲李伟康张婷余肖红钟文翰
Owner XILINMEN FURNITURE
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