Cushioning Energy Absorption Of Paper Corrugation/Honeycomb Double Tube Filled By Polyethylene Foam Under Axial Drop Impact

The polyethylene foam-filled paper corrugation/honeycomb double tube can dissipate and absorb external energy through the deformation of the paper corrugation/honeycomb tube and polyethylene foam under axial static compression and drop impact dynamic compression.It is a new type of non-metallic filled double tubular energy-absorbing structure.In this paper,through comparative analysis,the influence of tube structure parameters and drop impact conditions on the energy absorption and impact resistance of polyethylene foam-filled paper corrugation/honeycomb double tube is studied.The main research contents include:First,through the axial static compression test,use the total energy absorption,specific energy absorption,specific total efficiency,initial peak stress,average stress,and crush force efficiency to evaluate the cushioning energy absorption of the polyethylene foam-filled paper corrugation/honeycomb double tube.The results show that the energy absorption effect of the Y-direction paper corrugation double tube is better than that of the X-direction tube,and the X-direction paper corrugation double tube will not produce excessively high stress during the static compression process to damage the protected object.As the tube length ratio increases,the total energy absorption of the paper corrugation/honeycomb double tube increases,and the specific total efficiency decreases.Secondly,the polyethylene foam filled paper corrugation/honeycomb double tube was subjected to the axial drop impact test under different drop impact conditions.Obtain the acceleration-time curve and the displacement-time curve,and then obtain the axial dynamic compression stress-strain curve through calculation.The results show that the axial drop impact cushioning energy absorption of the X-direction paper corrugation double tube is better than that of the Y-direction tube.The energy absorption effect of the Y-direction EPE double-filled paper honeycomb double tube is better than that of the X-direction tube,and the impact resistance of the X-direction EPE single-filled paper honeycomb double tube is better than that of the Y-direction tube.The X-direction paper corrugation double tube has an accordion deformation mode,and the Y-direction paper corrugation double tube undergoes steady-state gradual buckling.As the tube length ratio increases,the specific energy absorption and specific total efficiency of the EPE filled paper corrugation/honeycomb double tube decrease.The axial compression deformation of the paper honeycomb double tube will cause corner tearing and structural instability.Finally,the characteristics of compression deformation and cushioning energy absorption of polyethylene foam-filled paper corrugation/honeycomb double tube under axial static compression and drop impact dynamic compression are summarized.