Research On The Bearing/Cushioning Mechanism And Performance Characterization Of Honeycomb Paperboards

Due to its novel structure, light weight, favorable bearing performance and environmental friendliness, honeycomb paperboard has been widely used in the field of packaging and others such as architecture and agriculture industry. Firstly, the solid modulus and yield strength of honeycomb paper were tested considering the effect of relative humidity, which was experimental and theoretical foundation for the paper. Due to the anisotropic for honeycomb paper and the longitudinal strength is bigger than transverse strength for paper-class materials, longitudinal direction is often used as the in-plane bearing direction. In this paper, the studies are all about the longitudinal properties of honeycomb paper.The properties of honeycomb paperboards are very different between the in-plane direction and the out-plane direction, on both aspects the paper were studied. The research work mainly included as follow:(1)The in-plane plateau stress model of honeycomb paperboard considering the effect of relative humidity was established, which was compared with the experimental data. The results show that the thickness and liners of honeycomb paperboard have great influence on the in-plane plateau stress, on which the core layers has little influence, The model can accurately reflects the influence of relative humidity conditions on the plateau stress of paper honeycombs. With this model, the in-plane plateau stress considering humidity conditions can be estimated without experiments, and the proposed method can be used to provide theory basis for the paper constitution and reasonable selection of honeycomb paperboards.(2)The effects of thicknesses, core layers and liners on the in-plane energy absorption performance of honeycomb paperboard were observed under standard conditions in this paper. The theoretical energy-absorption diagrams were molded and constructed by computer, which was compared with the experimental data. The results show that the thickness of honeycomb paperboard and the liners have a great effect on its in-plane energy absorption performance, the core layers of honeycomb paperboard hasn't obvious effect on its in-plane energy absorption. The model can accurately reflect the energy absorption performance of honeycomb paperboard.(3) The out-plane plateau stress model of honeycomb cardboard considering the effects of relative humidity was established and compared with the experimental data.(4) Based on cushioning curves of honeycomb paperboards under static and dynamic compression with different thickness-to-length ratios under different relative humidity conditions, the energy-absorption diagrams are molded and constructed by computer, including strain rates, honeycomb structures and relative humidity conditions.(5)The bearing and energy absorption performance for honeycomb paperboards based on the influence of strain rate were studied in this paper.