基于ANSYS瓦楞纸板等效力学性能研究

Finite Element Analysis of Corrugated Cardboard and Its Simplified Model Based on ANSYS

目的为提升瓦楞纸板压缩性能仿真效率,采用有限元方法替代试验测试,以节省时间与成本,减少环境污染,促进可持续发展,为瓦楞纸箱的优化设计提供决策依据。方法从箱板纸和瓦楞原纸性能出发,对瓦楞纸板的最小单元进行1∶1建模分析,通过ANSYS对瓦楞纸板压缩性能进行仿真求解并对结果进行分析,找到一种瓦楞纸板力学性能的等效方法。利用瓦楞纸板的等效力学性能对瓦楞纸板模型进行一定程度的简化,以达到在保证一定求解精度的情况下,提高求解速度的目的。结果箱板纸和瓦楞原纸的力学性能可用双线性等向强化模型等效;瓦楞纸板压缩过程分为4个阶段:弹性、屈服、平台、密实化。通过ANSYS Workbench的Static Structure模块进行仿真,与试验结果对比,仿真能有效预测其压缩性能。简化瓦楞纸板为均质长方体后,仿真结果显示,简化模型平压有限元分析求解时间减少13%~60%,内存减少37%~62%,且模型尺寸越大,减少得越多。结论使用该方法对瓦楞纸板的压缩性能进行仿真,解决了以往通过反复试验来优化包装设计的弊端,能节约时间,降低瓦楞纸板的生产成本和减少环境污染,实现可持续发展。

The work aims to improve the efficiency of simulating corrugated cardboard and consequently replace experimental testing with finite element methods,so as to save time and cost,reduce environmental pollution,and thus promote sustainable development and provide decision-making basis for the optimization design of corrugated cardboard boxes.Starting from the mechanical properties of linerboard and corrugated medium,the minimum unit of corrugated cardboard was modeled at a 1∶1 for analysis.Compression performance of corrugated cardboard was simulated and solved using ANSYS,and the results were analyzed to find an equivalent method for the mechanical properties of corrugated cardboard.By utilizing the equivalent mechanical properties of corrugated cardboard,the model of corrugated cardboard was simplified to some extent to improve the solving speed while ensuring a certain level of accuracy.The mechanical properties of linerboard and corrugated medium could be equivalent using a bilinear isotropic hardening model.The compression process of corrugated cardboard was divided into four stages:elastic,yielding,plateau,and densification.Simulation was carried out using the Static Structure module of the ANSYS Workbench.Compared with experimental results,the simulation could effectively predict its compression performance.After simplifying corrugated cardboard to a homogeneous rectangular prism,simulation results showed that the simplified model reduced the solving time of flat pressing finite element analysis by 13%to 60%,and reduced the memory usage by 37%to 62%,with greater reductions for larger model sizes.Using this method to simulate the compression performance of corrugated cardboard solves the drawbacks of optimizing packaging design through repeated experiments in the past.It saves time,reduces production costs,and environmental pollution of corrugated cardboard,and achieves sustainable development.