| 摘要: |
| 目的 对EPE棱跌落的缓冲性能进行试验研究， 验证现有棱跌落当量面积计算方法的局限性， 并探索动态当量面积的计算方法。方法 通过动态冲击试验研究， 对比棱线接触、 V台接触和纸箱包装棱部冲击等3种接触方式对当量面积大小的影响程度， 以及构成棱部缓冲结构中边长、 棱长与缓冲作用的关系。结果 3种接触方式动态冲击试验获得的最大加速度-静应力曲线族表明： 在构成的棱部缓冲结构中， 在相同当量面积条件下， 棱长的增加会降低冲击接触应力和加速度； 边长变化对实际应用中缓冲效果的影响不显著。结论 现有当量面积计算方法无法作为可靠的缓冲设计依据。在棱跌落冲击状态下，棱垫的边长变化较棱长对缓冲性能有更大的影响。 |
| 关键词: 发泡聚乙烯 棱跌落 动态冲击 当量面积 |
| DOI： |
| 分类号:TB485.3 |
| 基金项目: |
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| Experimental Research on Drop Cushioning Performance at the Edge of EPE |
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SHEN Yi-qi, KANG Yong-gang
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Tianjin University of Science and Technology，Tianjin 300222，China
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| Abstract: |
| The drop cushioning performance at the edge of EPE was experimentally studied to verify the limitation of the current calculation method for edge drop equivalent area, and to explore a calculation method for dynamic equivalent area. By conducting dynamic impact tests, the effects of three different contacting forms including edge contacting, V type contacting, and edge contact with corrugated paperboard container on the equivalent area were compared, and the relationship of the side-length and edge-length in the edge cushioning structure with the cushioning effect was studied. Acceleration level-static stress curves obtained by dynamic impact experiments with three different contacting forms showed that increasing side-length in the edge cushioning structure lowered both the acceleration and static loading under the condition of constant equivalent area, whereas the change of side-length had little contribution to the cushioning effect in actual application. The existing theory cannot be regarded as a reliable method in edge drop calculation in cushioning design. Change of edge length possesses more cushioning function compared to side length in edge drop state of a packaging. |
| Key words: EPE edge drop dynamic impact equivalent area |
