薄膜力学行为及其空气垫缓冲性能研究
发布时间：2019-04-10 19:50
【摘要】：商品经济的快速发展，特别是网络购物的流行，对缓冲包装行业提出了更高的要求。空气垫是一种既具有环保性又具有优良缓冲性能的缓冲包装材料，由聚合物薄膜包裹气体而成。主要应用于电子产品、易碎产品等的内层保护包装。本文通过实验和有限元分析相结合的方式，逐层深入地研究了薄膜材料的力学行为以及空气垫的缓冲性能，为用有限元分析的方法进行缓冲包装设计奠定了基础。 考虑到薄膜高度非线性弹性，在连续介质力学的基础上，为薄膜材料建立了超弹性本构模型。将开发的本构模型通过用户子程序UHYPER编译到通用型非线性有限元软件ABAQUS中，为数值模拟提供合适的材料模型。利用有限元软件和开发的用户子程序进行空气垫的静态压缩模拟。模拟结果与实验结果对比表明所提出的本构模型可以很好地描述空气垫薄膜在静态压缩时的力学行为。 利用有限元法对空气垫进行缓冲吸能特性分析，讨论了不同充气压力的影响。结果表明空气垫充气压力越大，承载能力越大。但在一定范围内充气压力越小，静态缓冲系数越小，缓冲性能越好。 考虑空气垫在应用过程中的实际工况，进行空气垫的动态压缩实验，探讨在相同的冲击能量下，空气垫充气压力对缓冲性能的影响。在超弹性本构模型的基础上，考虑应变速率对空气垫薄膜力学行为的影响，，进一步构建粘超弹性本构。通过拟合实验数据得到模型中的参数值，并成功对0.064/s的应变速率下的薄膜力学行为进行预测。
[Abstract]:The rapid development of commodity economy, especially the popularity of online shopping, put forward higher requirements for cushioning packaging industry. Air cushion is a kind of cushioning packaging material with environmental protection and excellent cushioning performance, which is made of polymer film coated with gas. Mainly used in electronic products, fragile products and other inner layer protection packaging. Through the combination of experiment and finite element analysis, the mechanical behavior of thin film material and the cushioning performance of air cushion are studied layer by layer in this paper, which lays a foundation for the design of cushioning package by finite element analysis. Considering the highly nonlinear elasticity of thin film, the hyperelastic constitutive model of thin film material is established on the basis of continuum mechanics. The developed constitutive model is compiled into the general nonlinear finite element software ABAQUS by user subprogram UHYPER to provide a suitable material model for numerical simulation. The static compression simulation of air cushion is carried out by using finite element software and user subroutine. The comparison between the simulation results and the experimental results shows that the proposed constitutive model can well describe the mechanical behavior of the air cushion film under static compression. The cushioning and energy absorption characteristics of air cushion are analyzed by finite element method, and the effects of different inflatable pressures are discussed. The results show that the higher the inflatable pressure of the air cushion is, the greater the bearing capacity is. However, the smaller the inflatable pressure is, the smaller the static buffering coefficient is, and the better the buffering performance is. Considering the actual working condition of the air cushion in application, the dynamic compression experiment of the air cushion is carried out, and the influence of the air cushion inflatable pressure on the cushioning performance under the same impact energy is discussed. Based on the hyperelastic constitutive model and considering the effect of strain rate on the mechanical behavior of air cushion film, the viscoelastic hyperelastic constitutive model is further constructed. The parameters of the model are obtained by fitting the experimental data, and the mechanical behavior of the film at the strain rate of 0.064? s is predicted successfully.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB485.1;TB383.2
本文编号：2456078
[Abstract]:The rapid development of commodity economy, especially the popularity of online shopping, put forward higher requirements for cushioning packaging industry. Air cushion is a kind of cushioning packaging material with environmental protection and excellent cushioning performance, which is made of polymer film coated with gas. Mainly used in electronic products, fragile products and other inner layer protection packaging. Through the combination of experiment and finite element analysis, the mechanical behavior of thin film material and the cushioning performance of air cushion are studied layer by layer in this paper, which lays a foundation for the design of cushioning package by finite element analysis. Considering the highly nonlinear elasticity of thin film, the hyperelastic constitutive model of thin film material is established on the basis of continuum mechanics. The developed constitutive model is compiled into the general nonlinear finite element software ABAQUS by user subprogram UHYPER to provide a suitable material model for numerical simulation. The static compression simulation of air cushion is carried out by using finite element software and user subroutine. The comparison between the simulation results and the experimental results shows that the proposed constitutive model can well describe the mechanical behavior of the air cushion film under static compression. The cushioning and energy absorption characteristics of air cushion are analyzed by finite element method, and the effects of different inflatable pressures are discussed. The results show that the higher the inflatable pressure of the air cushion is, the greater the bearing capacity is. However, the smaller the inflatable pressure is, the smaller the static buffering coefficient is, and the better the buffering performance is. Considering the actual working condition of the air cushion in application, the dynamic compression experiment of the air cushion is carried out, and the influence of the air cushion inflatable pressure on the cushioning performance under the same impact energy is discussed. Based on the hyperelastic constitutive model and considering the effect of strain rate on the mechanical behavior of air cushion film, the viscoelastic hyperelastic constitutive model is further constructed. The parameters of the model are obtained by fitting the experimental data, and the mechanical behavior of the film at the strain rate of 0.064? s is predicted successfully.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB485.1;TB383.2
【参考文献】
相关期刊论文 前10条
1 郑小林,郑百哲,任力强;气垫性能及平板玻璃缓冲包装[J];包装工程;1991年02期
2 王梅;蜂窝纸板缓冲性能的研究及应用[J];包装工程;2000年04期
3 郝喜海,马力,唐芬南,王桥医,丁智平;新型绿色缓冲包装材料及生产设备的研究[J];包装工程;2000年05期
4 金国斌,徐兰萍;纸浆模塑件生产工艺方法综合研究[J];包装工程;2004年03期
5 李清,齐明思;蜂窝纸板生产工艺改进[J];包装工程;2004年05期
6 高德,刘壮,董静,常江;瓦楞纸板包装材料的性能及其发展前景[J];包装工程;2005年01期
7 周明砚,张峻岭;缓冲包装设计理论的发展及方向[J];包装工程;2005年02期
8 李厚民,朱若燕,杨晓俊,姜久红;蜂窝纸板与瓦楞纸板组合结构缓冲特性研究[J];包装工程;2005年04期
9 傅静芳;充气垫作为小型家电缓冲包装的可行性研究[J];包装工程;2005年05期
10 计宏伟;邵文泉;王和敏;兰娟;;纸浆模塑材料在不同加载条件下的力学特性[J];包装工程;2007年08期
本文编号：2456078
本文链接：https://www.wllwen.com/guanlilunwen/gongchengguanli/2456078.html
