相对湿度和开孔对纸蜂窝芯层抗压强度的影响

Effect of Relative Humidity and Perforating on Compressive Strength of Paper Honeycomb Core

中文关键词:  纸蜂窝芯层  抗压强度  环压强度  开孔  相对湿度

Key Words:paper honeycomb core  compressive strength  ring crush resistance  perforating  relative humidity

中文摘要:

      对无孔、开孔蜂窝芯纸条和5种纸蜂窝芯层进行静态压缩实验，研究了相对湿度和开孔（圆孔直径、圆孔数量）对蜂窝芯纸条纵向和横向环压强度以及纸蜂窝芯层抗压强度的影响规律，采用多元线性回归分析法和SPSS软件评估了相对湿度和圆孔直径对蜂窝芯纸条纵向和横向环压强度的影响，探讨了长度缺陷率与环压强度系数之间的经验关系。实验结果表明，无孔和开孔蜂窝芯纸条的纵向环压强度是横向环压强度的1.4~1.5倍；蜂窝芯纸条纵向和横向环压强度以及纸蜂窝芯层的抗压强度都随着相对湿度、圆孔直径和圆孔数量的增加而降低，且双孔蜂窝芯纸条的纵向环压强度和双孔纸蜂窝芯层的抗压强度更易受相对湿度的影响；在相对湿度和开孔的综合影响下，纸蜂窝芯层适合开圆孔直径为2 mm或3 mm的单孔。

Abstract:

      Imperforated, perforated honeycomb core paper strip and five kinds of paper honeycomb cores static compression experiments were carried out. The effects of relative humidity and perforating (the diameter and number of circular hole) on the longitudinal and transverse ring crush resistances of honeycomb core paper strip and the compressive strength of paper honeycomb core were studied. The influence of relative humidity and diameter of circular hole on the ring crush resistance was evaluated by multiple linear regression analysis and SPSS, and the empirical relationships between length defect rate and the coefficient of ring crush resistance were discussed. The results indicated that, the longitudinal ring crush resistances of honeycomb core paper strips with no hole, single-hole and double-hole were about 1.4 to 1.5 times of that of transverse direction. Longitudinal and transverse ring crush resistances of honeycomb core paper strip and the compressive strength of paper honeycomb core decreased with the increase of relative humidity, diameter and number of circular hole. Moreover, the longitudinal ring crush resistance of honeycomb core paper strip with double-hole and the compressive strength of double-hole paper honeycomb core were more sensitive to humidity. Perforating a single circular hole with diameter of 2 mm or 3 mm was suitable for the paper honeycomb core under the integrated influence of relative humidity and perforating.