一种植物纤维发泡材料的静态力学性能研究

发布时间：2018-04-27 17:20

本文选题：植物纤维发泡材料 + 粘弹塑性　；参考：《包装工程》2017年21期

【摘要】：目的研究某植物纤维发泡材料的力学性能,建立粘弹塑性力学模型。方法用万能材料试验机进行静态压缩实验,得到该植物纤维发泡材料的应力-应变曲线,并建立其力学模型,用SPSS软件对实验数据回归分析和参数识别,最后对比分析模型曲线与实验数据的吻合度。结果该植物纤维发泡材料变形有3个阶段,即弹性阶段、粘塑性阶段和压溃阶段。该植物纤维发泡材料的粘弹塑性模型可由1个线性弹簧元件、1个非线性弹簧元件、1个粘性元件和1个塑性元件组合而成。在弹性阶段,该植物纤维发泡材料的弹性模量参数为5.873 MPa;在粘塑性阶段,该植物纤维发泡材料的力学模型可用三次函数来表示,三次项、二次项、一次项和常数项的参数分别为9.155,-9.1,3.608,0.136。结论该植物纤维发泡材料是一种粘弹塑性材料,其理论模型可用三次函数表示,实验数据与理论模型吻合度高。
[Abstract]:Objective to study the mechanical properties of a plant fiber foaming material and to establish a viscoelastic plastic mechanical model. Methods the stress-strain curve of the plant fiber foamed material was obtained by static compression experiment with universal material testing machine, and its mechanical model was established. The regression analysis and parameter identification of the experimental data were carried out by SPSS software. Finally, the consistency between the model curve and the experimental data is analyzed. Results there are three stages in the deformation of the foamed material: elastic stage, viscoplastic stage and crushing stage. The viscoelastic-plastic model of the plant fiber foaming material can be composed of one linear spring element, one nonlinear spring element, one viscous element and one plastic element. In the elastic stage, the elastic modulus parameter of the foamed material is 5.873 MPA, and in the viscoplastic stage, the mechanical model of the foamed material can be expressed by cubic function, cubic term, quadratic term, The parameters of the first term and the constant term are 9.155- 9.1g ~ 3.608 ~ 0.136, respectively. Conclusion the plant fiber foamed material is a viscoelastic-plastic material, its theoretical model can be expressed by cubic function, and the experimental data are in good agreement with the theoretical model.
【作者单位】：重庆工商大学制造装备机构设计与控制重庆市重点实验室;重庆工商大学数学与统计学院;
【基金】：重庆市教育委员会科学技术研究项目(KJ120707)
【分类号】：TB484

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