基于有限元分析的可循环拉链邮袋仿真模拟研究

Simulation of Recyclable Zipper Mail Bag Based on Finite Element Analysis

目的设计质量、强度满足使用的可循环拉链邮袋,代替一次性邮袋,实现绿色发展理念。方法设计可循环拉链邮袋结构,基于有限元分析模拟拉链邮袋实际应用中真实物理系统。分析拉链邮袋在材质、夹具固定方式、负载3种影响因素下的应力、应变、变形情况,比较仿真结果,确定可循环拉链邮袋材质并验证。结果不同材质下,涤纶树脂(PET)变形量较小,高密度聚乙烯(HDPE)次之,聚丙烯(PP)变形量较大。不同固定方式下,袋口两短边夹具固定,袋口应力较集中,最大位移和应变较大,袋口四边夹具固定袋口变形较小、应力较小。不同负载下,负载与应力、位移、应变三者变化呈正相关,最大应力、位移、应变出现的位置较为稳定。结论借助有限元分析模拟拉链邮袋实际应用中受力情况,分析不同材质、夹具固定方式、负载情况下,可循环拉链邮袋力学性能,节省人力、物力,为实际应用提供依据,同时,证明了涤纶树脂(PET)可应用于可循环拉链邮袋的制作,为绿色、环保、可降解、可循环拉链邮袋的制作奠定基础,对限塑、绿色发展有着重要的意义。

The work aims to design a recyclable zipper mail bag with quality and strength meeting the need of use to replace the disposable mail bag and realize the concept of green development.The structure of the recyclable zipper mail bag was designed.Based on finite element analysis,the real physical system of zipper mail bag in practical applica-tion was simulated.The stress,strain and deformation of the zipper mail bag under three influencing factors such as ma-terial,fixing method of clamp and load were analyzed.Then,the simulation results were compared to determine and ver-ify the material of recyclable zipper mail bag.In view of different materials,polyester resin(PET)had a smaller defor-mation,followed by high-density polyethylene(HDPE),while polypropylene(PP)had a larger deformation.In different fixing methods,when two short sides of the bag mouth were fixed by clamps,the stress of the bag mouth was more con-centrated,the displacement was the maximum and the strain was larger.However,when the four sides of bag mouth were fixed by clamps,deformation and stress were both less.Under different loads,the load and the changes of stress,dis-placement and strain were positively correlated,and the positions where the maximum stress,displacement,and strain appeared were relatively stable.With the help of finite element analysis,the stress in practical application of zipper mail bag is simulated,and the mechanical properties of recyclable zipper mail bag under different materials,fixing meth-ods of clamp and loads are analyzed,which saves manpower and material resources and provides a basis for practical ap-plication.At the same time,the feasibility of polyester resin(PET)as recyclable zipper mail bag is proved,which lays a foundation for the production of green,environmentally friendly,degradable and recyclable zipper mail bag,and has im-portant significance for plastic limiting and green development.