开孔缺陷对蜂窝与瓦楞纸板侧向临界屈曲载荷弱化效应的研究

Weakening Effect of Hole Defects on Lateral Critical Buckling Load of Honeycomb and Corrugated Cardboard

目的以蜂窝纸板和瓦楞纸板为对象,研究2种纸板圆孔缺陷对侧向承载能力的弱化效应。方法利用ANSYS Workbench软件的数值模拟功能,对2种纸板的开孔模型进行特征值屈曲分析,研究了2种纸板临界屈曲载荷随孔径大小的变化趋势,分析了2种纸板侧向承载能力对孔洞缺陷的敏感性。结果随着孔径的增大,蜂窝纸板与瓦楞纸板的屈曲临界载荷均呈逐渐下降趋势;开孔大于临界值后,瓦楞纸板的屈曲载荷下降率明显高于蜂窝纸板。结论随着孔径的增大,蜂窝纸板侧向承载能力的下降速度小于瓦楞纸板,蜂窝纸板表现出比瓦楞纸板更优的开孔缺陷弱化效应。

The work aims to study the weakening effect of circular hole defects on lateral bearing capacity of honeycomb cardboard and corrugated cardboard.The finite element numerical calculation method was used based on ANSYS Workbench,and an eigenvalue buckling analysis was conducted on both types of cardboard.The tendency of critical buckling load of the two types cardboard with different hole sizes was analyzed,and the sensitivity of lateral bearing capacity to hole defects was explored.As the hole diameter increased,the buckling critical load of both honeycomb cardboard and corrugated cardboard gradually decreased.When the circular hole was greater than the critical value,the buckling load reduction rate of corrugated cardboard was significantly higher than that of honeycomb cardboard.As the hole diameter increases,the decrease rate of the lateral load-bearing capacity of honeycomb cardboard is slower than that of corrugated cardboard,and honeycomb cardboard exhibits a superior weakening effect of hole defects compared with corrugated cardboard.