Influence Of Structure And Inflatable State On Cushion Performance Of Air Cushion

In order to avoid or reduce the damage of the product during transportation and reduce the vibration and impact of the system,the product needs to be cushioned and protected.As a cushioning packaging material with excellent performance,air cushions can replace foam plastics and other materials for cushioning packaging of various commodities.In this study,through theoretical analysis,experimental research,and finite element simulation,the influence of the main structural parameters of the air cushion on its cushioning performance was studied.The finite element software ABAQUS was used to perform a drop simulation analysis on the air cushion cushion packaging of square and cylindrical products,so that the design of the air cushion cushion package was more accurate.Uniaxial tensile experiments were carried out on PA/PE blend films of different thicknesses,and the nominal stress-strain of the film was obtained as the property parameter of the material,and the fourth-order Ogden strain energy release function was fitted,and the Poisson’s ratio of the film was determined.Parameters,uniaxial tensile finite element simulation calculations were carried out,and the breaking strength of films with different thicknesses was obtained.Through static compression experiments,the bearing capacity-displacement curves of films with different thicknesses and different inflation pressures are obtained.Based on the uniaxial tensile test data and air state parameters of the film,the static compression finite element simulation of the air cushion was carried out.The bearing capacity-displacement curve calculated by finite element simulation is basically consistent with the experimental results.The results show that as the air cushion inflation pressure and film thickness increase,the static cushion coefficient of the air cushion decreases,and the cushion effect of the air cushion is better.The error between the strain energy obtained by the experiment and the strain energy extracted by the finite element simulation is within 10%.The air cushion cushion packaging for square products and cylindrical products was designed,and dynamic shock numerical simulations were carried out using ABAQUS software to explore the influence of film thickness,inflation pressure and product shape on the cushioning performance of air cushions.The results show that: between 40 kPa-60 kPa,the greater the initial inflation pressure,the better the energy absorption characteristics of the air cushion;the greater the thickness of the film used by the air cushion,the more energy the air cushion absorbs;the buffer area of the square product when it is dropped Larger,short buffer time,small buffer area of cylindrical products,easy to roll when falling.The cylindrical product has a longer buffer time and absorbs less energy during impact.