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The effect of pallet top deck stiffness on the compression strength of asymmetrically supported corrugated boxes
Packaging Technology and Science ( IF 2.8 ) Pub Date : 2020-09-02 , DOI: 10.1002/pts.2533 Chandler Quesenberry 1 , Laszlo Horvath 1 , John Bouldin 1 , Marshall S. White 1
Packaging Technology and Science ( IF 2.8 ) Pub Date : 2020-09-02 , DOI: 10.1002/pts.2533 Chandler Quesenberry 1 , Laszlo Horvath 1 , John Bouldin 1 , Marshall S. White 1
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During unitized shipment, the components of unit loads are interacting with each other. During floor stacking of unit loads, the load on the top of the pallet causes the top deck of the pallet to bend, which creates an uneven top deck surface resulting in uneven or asymmetrical support of the corrugated boxes. This asymmetrical support could significantly affect the strength of the corrugated boxes, and it depends on the top deck stiffness of the pallet. This study is aimed at investigating how the variations of pallet top deck stiffness and the resulting asymmetric support affect corrugated box compression strength. The study used a scaled‐down unit load compression test on quarter‐scale pallet designs with different deckboard thicknesses using four different corrugated box designs. Pallet top deck stiffness was determined to have a significant effect on box compression strength. There was a 27%–37% increase in box compression strength for boxes supported by high‐stiffness pallets in comparison with low‐stiffness pallets. The fact that boxes were weaker on low‐stiffness pallets could be explained by the uneven pressure distribution between the pallet deck and bottom layer of boxes. Pressure data showed that a higher percentage of total pressure was located under the box sidewalls that were supported on the outside stringers of low‐stiffness pallets in comparison with high‐stiffness pallets. This was disproportionately loading one side of the box. Utilizing the effects of pallet top deck stiffness on box compression performance, a unit load cost analysis is presented showing that a stiffer pallet can be used to carry boxes with less board material; hence, it can reduce the total unit load packaging cost.
中文翻译：
托板顶板刚度对不对称支撑瓦楞纸箱抗压强度的影响
在统一装运期间，单位负载的各个组件相互交互。在单位负载的地板堆放过程中，托盘顶部的负载会导致托盘的顶板弯曲，从而导致顶板表面不平整，从而导致瓦楞纸箱的支撑不均匀或不对称。这种不对称的支撑可能会严重影响瓦楞纸箱的强度，这取决于货盘的顶板刚度。这项研究旨在调查托盘顶板刚度的变化以及由此产生的不对称支撑如何影响瓦楞纸箱的抗压强度。这项研究使用了四种不同的瓦楞纸箱设计，对不同甲板厚度的四分之一托盘设计进行了按比例缩小的单位载荷压缩试验。确定了托盘顶板刚度对箱子的抗压强度有重大影响。与低刚度托盘相比，高刚度托盘支撑的箱子的箱子抗压强度提高了27％–37％。低刚度托盘上的箱子较弱的事实可以用托盘甲板和箱子的底层之间的压力分布不均匀来解释。压力数据显示，与高刚度托盘相比，低总重量托盘的外部纵梁上所支撑的箱侧壁下方的总压力百分比更高。这是不成比例地装入盒子的一侧。利用托盘顶板刚度对箱子压缩性能的影响，进行了单位负载成本分析，结果表明可以使用较硬的托盘来承载较少板材的箱子；因此，可以降低总的单位负载包装成本。
更新日期：2020-11-03
中文翻译：
托板顶板刚度对不对称支撑瓦楞纸箱抗压强度的影响
在统一装运期间，单位负载的各个组件相互交互。在单位负载的地板堆放过程中，托盘顶部的负载会导致托盘的顶板弯曲，从而导致顶板表面不平整，从而导致瓦楞纸箱的支撑不均匀或不对称。这种不对称的支撑可能会严重影响瓦楞纸箱的强度，这取决于货盘的顶板刚度。这项研究旨在调查托盘顶板刚度的变化以及由此产生的不对称支撑如何影响瓦楞纸箱的抗压强度。这项研究使用了四种不同的瓦楞纸箱设计，对不同甲板厚度的四分之一托盘设计进行了按比例缩小的单位载荷压缩试验。确定了托盘顶板刚度对箱子的抗压强度有重大影响。与低刚度托盘相比，高刚度托盘支撑的箱子的箱子抗压强度提高了27％–37％。低刚度托盘上的箱子较弱的事实可以用托盘甲板和箱子的底层之间的压力分布不均匀来解释。压力数据显示，与高刚度托盘相比，低总重量托盘的外部纵梁上所支撑的箱侧壁下方的总压力百分比更高。这是不成比例地装入盒子的一侧。利用托盘顶板刚度对箱子压缩性能的影响，进行了单位负载成本分析，结果表明可以使用较硬的托盘来承载较少板材的箱子；因此，可以降低总的单位负载包装成本。
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