Optimization Energy Absorption Of Paper Honeycomb And Paper Corrugation Composite Sandwich Structure

Paper corrugation and paper honeycomb are typical light porous materials among paper cushioning packaging materials.It has greater practical significance in the protection of military/civil products cushioning packaging.In this paper,the deformation characteristics and cushioning energy absorption of single-sided and double-sided composite sandwich structures composed of BC double-corrugated cardboard and paper honeycomb with different thicknesses under dynamic drop impact are studied,and the finite element simulation analysis and optimization are carried out.The main research contents include:Firstly,the paper corrugated-paper honeycomb composite sandwich structure was subjected to the dynamic drop impact test.The impact acceleration-impact duration curves and stress-strain curves were obtained.The deformation moods,characteristics and cushioning energy absorption of the composite sandwich structure were analyzed.The composite sandwich structure exhibits layer-by-layer collapse when subjected to impact.With the increase of impact mass or drop height,the double-sided composite structure has smaller peak acceleration and longer impact duration than the single-sided structure,so the double-sided structure has superior impact resistance to the single-sided structure.As the impact velocity or impact mass increases,the cushioning energy absorption of the paper composite sandwich structure shall enhance.Under the same impact energy and honeycomb thickness,the single-sided composite structure can hold better cushioning energy absorption than the double-sided structure.For the drop impact with small energy,the increase of honeycomb thickness can reduce the energy absorption of the composite sandwich structure.For the drop impact with high energy,the influence of honeycomb thickness on cushioning energy absorption is contrary.Therefore,the paper honeycomb with small thickness is more conducive to the energy absorption of composite sandwich structure,while the paper honeycomb with large thickness is suitable for the condition of strong impact energy.Secondly,the tensile test was carried out on the paper substrate to obtain the elastic parameters of the paper,which provided material parameters for the finite element simulation and theoretical analysis.Through the finite element software HyperMesh and ABAQUS,the drop impact test simulation model of the composite sandwich structure is established,and the theoretical deformation characteristics,deformation displacement,load and other data of the model are obtained.Finally,by comparing the simulation and experimental data,the simulation model is verified by the deformation characteristics,deformation curve trend and cushioning performance.The simulation results are in good agreement with the experimental results.According to the cushioning energy absorption results of the model,the structure with relatively optimal energy absorption is obtained.The model is analyzed by considering plastic parameters.It was found that the simulation results of the finite element model with plastic parameters are closer to the experimental results.