蔗渣-淀粉发泡缓冲材料的本构方程及有限元仿真

发布时间：2018-02-23 06:29

本文关键词： 蔗渣纤维发泡缓冲材料本构方程有限元仿真　出处：《包装工程》2017年11期 　论文类型：期刊论文

【摘要】：目的研究蔗渣-淀粉发泡缓冲材料的缓冲性能,建立此类缓冲材料的本构方程,方便此类材料的应用。方法对不同密度的蔗渣-淀粉复合材料,在不同湿度和应变率条件下对其进行静态压缩试验,并在Sherwood-Frost本构模型的基础上加以扩展,加入湿度对应变的影响项,建立该复合材料的静态压缩本构方程。根据实验数据,采用Origin拟合的数学方法确定相关系数。以该静态压缩本构方程拟合出的应力-应变曲线作为材料特性载入Abaqus软件中,模拟淀粉-蔗渣纤维发泡缓冲材料并进行静态压缩试验仿真,得到仿真曲线,并与实际试验曲线进行对比。结果仿真实验与实际实验的数据误差较小,整体误差在10%以内。结论建立的静态压缩本构方程可以很好地表征该复合材料的缓冲性能,避免了设计缓冲衬垫时需要大量试验才能得到材料曲线的问题。
[Abstract]:Objective to study the buffering properties of bagasse starch foam cushioning materials and to establish the constitutive equation of this kind of buffering materials so as to facilitate the application of these materials. Methods the different densities of bagasse starch composites were studied. The static compression test was carried out under different humidity and strain rates. The static compression constitutive equation of the composite was established by adding the influence of humidity on the strain, and extending the Sherwood-Frost constitutive model, according to the experimental data, the static compression constitutive equation of the composite was established. The correlation coefficient is determined by the mathematical method of Origin fitting. The stress-strain curve, which is fitted by the static compression constitutive equation, is loaded into the Abaqus software as the material characteristic. The static compression test was carried out to simulate the starch-bagasse fiber foaming buffer material. The simulation curve was obtained and compared with the actual test curve. The results showed that the data error between the simulation experiment and the actual experiment was small. The overall error is less than 10%. Conclusion the static compression constitutive equation can well characterize the cushioning performance of the composite material and avoid the problem that a large number of experiments are needed to obtain the material curve in the design of the cushioning liner.
【作者单位】：广西大学;
【基金】：广西自然基金(2013GXNSFFA019005)
【分类号】：TB484

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