Numerical simulation of compression deformation of natural latex foam

doi:10.19398/j.att.202109018

Abstract

Abstract: In order to analyze the compression performance of bedding latex foam and establish mathematical models of the deformation, pressure and thickness of the latex foam to facilitate the design of latex products, the finite element method was used to simulate and analyze its compression performance. First, the compressive, shear, and tensile properties of latex foam for bedding are tested, obtaining the stress and strain of three mechanical experiments. Combining the experimental results, three methods of "hyper foam test data, hyper foam model parameter method and low-density foam method" were used to simulate uniaxial compression for bedding latex foam in the finite element software ABAQUS. The simulation results and the experimental values are analyzed by fitting, and the results show that the degree of fit is the highest when the low-density foam method is used for simulation, reaching 98.71%. Therefore, the "low-density foam method" is used for simulation, which is relatively close to the actual compression performance of bedding latex foam. Then deformation simulation research on latex foam micro-element is performed. Through simulation experiment analysis of different thickness and deformation under a certain pressure, and simulation experiment analysis of different pressure and deformation under a certain thickness, the three types of deformation, pressure and thickness of latex foam are obtained. The mathematical model provides help for the subsequent personalized latex product size design. At the same time, as an innovative technology, the numerical simulation research method also provides a more convenient and scientific method for the research and design of textile materials and textile products.

Key words: bedding latex foam, stress, strain, uniaxial compression, simulation

摘要： 为方便乳胶纺织产品分析和设计,采用有限元法对寝具乳胶泡沫材料的压缩性能进行仿真与分析并建立乳胶泡沫变形量、压强、厚度三者的数学模型。在获得寝具乳胶泡沫的压缩性能、剪切性能、拉伸性能应力与应变实验结果的基础上,根据有限元软件ABAQUS对寝具乳胶泡沫分别采用超弹泡沫实验数据法、超弹泡沫模型参数法、低密度泡沫法3种方法进行单轴压缩仿真。仿真结果与实验值拟合分析结果显示,用低密度泡沫法仿真的拟合度相对最高,达到98.71%,相对最接近寝具乳胶泡沫的实际压缩性能。对乳胶泡沫微元进行变形仿真研究,分析得到乳胶泡沫变形量、压强、厚度三者的数学模型,为后续个性化乳胶产品尺寸设计提供帮助。

关键词: 寝具乳胶泡沫, 应力, 应变, 单轴压缩, 仿真

CLC Number:

CHEN Shunwei, LI Chunchun, SUN Mengqing, WANG Xueqin. Numerical simulation of compression deformation of natural latex foam[J]. Advanced Textile Technology, 2022, 30(5): 60-66.

陈顺微, 厉纯纯, 孙梦情, 王雪琴. 天然乳胶泡沫材料压缩形变的数值模拟[J]. 现代纺织技术, 2022, 30(5): 60-66.

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