Research On Structure,Performance And Simulation Of Molded Pulp Cushion

Molded pulp samples with bi-wave cushioning structures by recycled corrugated board were designed,processed and prepared,9 different forms of the structures with height change from 10mm,15mm and 30mm,and wave angle change from 5°,15° and 30°respectfully were tested.Performance by static compression and dynamic impact shows that loading ability of the samples goes up,and broad cushioning properties,but.less recovery with increasing waving angle at the same sample height.When the angle wave is 5 degree,its loading ability is up to 1885N,and the minimum acceleration is 50g's when the angle wave is 15 degree,the loading is up to 2521N,and the minimum acceleration is 80g's;when the angle waving is 30 degree,it can support loading up to 3569N,and the minimum acceleration is 70g's at sample structure height of 30mm.Similarly,higher height of samples possesses higher loading ability and better cushioning properties when wave angle keeps the same.For reliable simulation to result of the finite element analysis by input of needed parameters,in order to get the Poisson's ratio,tensile tests to molded pulp cushioning structure samples were performed using tensile extensometer and non-contact laser gauge to get longitudinal and lateral direction strain at the same time.Elastic modulus of 281MPa and Poisson's ratio of 0.3 were obtained by tests.Based on the proper tests to the bi-wave cushioning structure of molded pulp samples,simulation work was approached.Computer models were generated and static compression and dynamic impact to the samples were simulated.The simulation to static compression reflects the same trend of loading and deformation,and simulation to dynamic impact to the samples shows every close to real tests result.Analysis to the reasons of errors presented in between real tests and simulations was conducted by this research.Further approach was made by varying parameters input to the computer for reliability.