Research On Molded Pulp Structural Design And Numerical Simulation

Molded pulp product is a kind of geometrical cavum cushioning paper products which can suffer certain stress. The raw materials for example waste paper and plant fiber are foamed into different structural cavum after pulping, molding, drying and reforming. The cushioning function depends on the structural transmutation, so the structure design decides the cushioning ability. No scientific design principle is founded until now. How to summarize a detail practical design principle basing on the structure unit is the bottle-neck of molded pulp industry.In this article, mechanical property research of basic structural unit was implemented through theoretic analysis, experiment and numerical simulation as following:Basic structural units were summarized. Static compression tests were arranged for truncated cone unit and rib unit in order to distinguish excellent unit. Results showed the truncated cone unit had better anti-compression and cushioning ability.Bend equation of truncated cone shell unit was deducted from existing shell theory to explain the relationship between structural parameters and internal stress. Solutions were worked out under the practical boundary condition.Molded pulp material mechanical model was studied to ensure proper material model was selected during numerical simulation. ANSYS simulations were carried out according to 5 factors and 4 level test arrangements to get key structural parameters as well as its logical area.New design procedure and detail design methods were proposed on the base of above research in order to provide recommendation for common molded pulp products.