芯纸厚度对瓦楞纸板边压强度的影响及模拟

Effects and Simulation of Core Paper Thickness on Edge Crush Strength of Corrugated Board

目的 针对瓦楞纸板的强度设计未进行系统研究的问题,通过改变楞纸的厚度研究瓦楞结构的改变对其边压强度的影响。方法 对WH81287型号的五层BE型瓦楞纸箱进行取材,对瓦楞纸板进行边压强度(Edge Crush Test,ECT)试验,通过试验数据验证有限元软件中模型的可靠性,并在Matlab中对数据进行分析,通过调整瓦楞芯纸厚度以用于瓦楞纸板的强度设计。结果 在边压强度的试验中,根据实验数据可以得到,瓦楞纸板的平均变形量为0.824 0 mm,最大边压力均值为1 041.2 N。在仿真分析中,B瓦厚度趋近于0.210 0 mm时,瓦楞纸板的最大变形量均趋近于1.195 0 mm,最大等效应变均趋近于0.1150,最大等效应力趋近于23.5000MPa;在B瓦厚度增加或减少过多时,瓦楞纸板的最大变形量呈现逐渐增加的趋势,最大等效应变与最大等效应力出现陡增或骤减。结论 通过不同楞纸厚度与各参数之间的函数曲线图,找到了瓦楞纸板的最优参数,其最大变形量最小,最大等效应力、应变均较小且趋于稳定,这为实际应用中瓦楞纸板的强度设计提供了指导,提升了瓦楞纸板楞纸结构的设计效率。

The work aims to investigate the effects of changes in corrugated structure on its edge crush strength by changing the thickness of corrugated board to address the problem that the strength design of the corrugated board is not systematically studied. A WH81287 five-layer corrugated case was taken as the research material. Edge Crush Test(ECT)was conducted on the corrugated board. The test data were used to verify the reliability of the model in the finite element software, and the data were analyzed in Matlab to adjust the thickness of the corrugated core paper for the strength design of corrugated board. In the ECT, it can be seen from the test data that the average deformation of the corrugated board was 0.824 0 mm and its maximum average edge crush strength was 1 041.2 N. In the simulation analysis, the thickness of tile-B tended to be 0.210 0 mm. The maximum deformation of the corrugated board tended to be 1.195 0 mm, the maximum equivalent strain tended to be 0.115 0, and the maximum equivalent stress tended to be 23.500 0 MPa. When the thickness of tile-B increased or decreased too much, the maximum equivalent strain and the maximum equivalent stress increased or decreased sharply. According to the function curves between different corrugated board thicknesses and various parameters, the optimal parameters of the corrugated board are found. The maximum deformation is the minimum,and the maximum equivalent stress and strain are small and tend to be stable. This provides guidance for the strength design of corrugated paper in practical applications, and improves the design efficiency of corrugated paper structure of corrugated paper.