一种纸浆模塑蜂窝板材缓冲性能的研究

目的 为了解决因技术水平制约，纸蜂窝材料芯纸构型单一、单层厚度受限等瓶颈问题，开发一种通用型缓冲结构板材。方法 以纸浆模塑为原材料，以六棱柱结构为例，设计并加工出一种通过正反插方式组合而成的蜂窝板材，并采用有限元方法进行仿真，得到关键结构参数和相关最优参数组合。结果 正反插结构的纸浆模塑板材具有较好的耦合效应，承载能力相较于单层板材大幅提高；结合极限载荷、比吸能等评价指标对板材性能进行定量分析，初始压缩载荷最大可达到73.7kN，满足托盘等重型包装器具的承载需求。通过极差和方差分析可知，各结构参数对板材承载性能和缓冲性能的影响程度，研究表明单元壁厚、中截面边长对该板材承载性能和缓冲性能影响显著。结论 正反插结构解决了现有纸蜂窝材料高度、厚度受限，构型单一等瓶颈问题，提高了纸浆模塑蜂窝板材的承载性能和缓冲性能，可以满足重载要求。与之相关的其他正多边形锥形薄壁管单元亦可以使用同样的正反插设计理念和研究方法。

Cushioning Property of Pulp Molded Honeycomb Boards

The work aims todevelop a new general-purpose cushioning structure board to solve the bottleneck problems such as single core paper configuration and limited thickness of a single layer in honeycomb boards due to the limit of technological level. With molded pulp as raw material and hexagonal prism structure as an example, a honeycomb board was designed and processed by combining forward and reverse insertion method, and the finite element method was used for simulation to obtain key structural parameters and related optimal parameter combinations. The pulp molded board with forward and reverse insertion structure had good coupling effect. Its load carrying capacity was greatly improved compared with that of a single layer boards. The board performance was quantitatively analyzed by combining the evaluation indexes of ultimate load and specific energy absorption. The initial compressive load could reach a maximum of 73.7 kN, which met the load carrying requirements of heavy packaging apparatus such as trays. The effect of each structural parameter on the load carrying and cushioning property of the board was known by range and variance analysis. The study showed that the cell wall thickness and the edge length of the middle section had significant effect on the load carrying and cushioning property. The forward and reverse insertion structure solves the bottleneck problems of the existing paper honeycomb material with limited height and thickness and single configuration, and improves the load carrying and cushioning property of the pulp molded honeycomb board, which can meet the heavy load requirements. The same design concept and research method can be used for other regular polygon tapered thin-walled tube cells.