开孔纸蜂窝芯层的面外静态压缩特性 postprint

Abstract: In view of the out-of-plane static compression characteristics of paper honeycomb core layer withhole on double-layer cell walls , the compression deformation processes of paper honeycomb core layer with-out and with hole when the compression amount is 85% are investigated by experiments , and the effects ofrelative humidity and pore diameter on its strength performance are studied. Based on the symmetry of hon-eycomb structure and using two element models , the honeycomb cell walls loaded along the out-of-plane di-rection are regarded as simply-supported elastic plate without and with hole.'The prediction formulas of thecritical stress of elastic buckling and plastic plateau stress are derived.The results show that analytical cal-culations are in good agreement with the experimental results.Combining the orthotropic properties of thepaper sheet and the out-of-plane compressive feature of paper honeycomb core layer , the finite elementmodels of paper honeycomb without and with hole are established.The simulation of the bending and fold-ing deformation evolution processes for honeycomb cell walls during the elastic-plastic buckling stages is consistent with the deformation processes observed in the static compression experiment.