师广强,田勇浩,吴建帮,阳锋,张存雍,刘扬,赵劲飞,张宏.不同缓冲压头下香梨静压损伤特性研究[J].包装工程,2020,41(1):51-57.
SHI Guang-qiang,TIAN Yong-hao,WU Jian-bang,YANG Feng,ZHANG Cun-yong,LIU Yang,ZHAO Jin-fei,ZHANG Hong.Static Pressure Damage Characteristics of Korla Pear under Different Cushioning Head[J].Packaging Engineering,2020,41(1):51-57. |
| 不同缓冲压头下香梨静压损伤特性研究 |
| Static Pressure Damage Characteristics of Korla Pear under Different Cushioning Head |
| 投稿时间：2019-09-17 修订日期：2020-01-10 |
| DOI：10.19554/j.cnki.1001-3563.2020.01.008 |
| 中文关键词: 香梨 压缩速率 缓冲压头 机械特性 |
| 英文关键词: pear compression rate cushioning head mechanical properties |
| 基金项目:兵团科技特派员创新创业计划（2019CB037）。 |
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| 中文摘要: |
| 目的 解决库尔勒香梨在包装、运输过程中因静压产生的香梨损伤问题。方法 在不同压缩速率、不同摆放位置、不同缓冲压头条件下，利用万能试验压缩机测量分析香梨机械特性参数变化规律。结果 各压缩特性参数的分布规律大致相同，生物屈服极限、破坏极限、变形能、破坏能均随着压缩速率的增大逐渐增大，屈服极限、破坏极限在随压缩速率增大而增加的过程中有极值存在。香梨纵向部位压缩特性参数均大于横向部位压缩特性参数。在相同摆放位置下，泡沫缓冲压头的压缩特性参数最大，钢板压头下的特性参数最小。当速率为30 mm/min时，在泡沫缓冲压头下，香梨横向摆放时的生物屈服极限为105.98 N，变形能为242 N•mm，破坏极限为155.25 N，破坏能为582 N•mm。香梨纵向摆放时的生物屈服极限为135.91 N，变形能为521 N•mm，破坏极限为177.07 N，破坏能为942 N•mm。结论 不同缓冲压头下的压缩特性参数曲线分布规律大致相同，屈服极限和破坏极限在随压缩速率增大而增加的过程中有极值存在。香梨纵向摆放受到外界的机械损伤小于横向摆放所受的机械损伤，在香梨包装、贮藏、运输过程中应考虑摆放位置，尽可能让香梨纵向受力。当使用泡沫材质进行包装时，香梨机械损伤最小，在香梨包装时应考虑选用泡沫包装材质。 |
| 英文摘要: |
| The work aims to solve the damage of Korla pear caused by static pressure during packaging and transportation. Under the condition of different compression rates, different positions and different cushioning heads, the universal test compressor was used to measure and analyze the variation of mechanical characteristics parameters of pear. The distribution law of each compression characteristic parameter was basically the same. The yield limit, deformation energy, failure limit and failure energy of the organism all increased gradually with the increase of the compression rate, and extreme value was found out in the process of the yield limit and failure limit increasing with the increase of the compression rate. The compression characteristics of the longitudinal part of the pear were greater than those of the transverse part. At the same position, the compression characteristic parameters of the foam cushioning head were the largest, while the compression characteristic parameters of the steel plate head were the smallest. When the rate was 30 mm/min, under the foam cushioning head, the biological yield limit of pear placed horizontally was 105.98 N, the deformation energy was 242 N•mm, the damage limit was 155.25 N, and the damage energy was 582 N•mm. When placed vertically, the yield limit of pear was 135.91 N, the deformation energy was 521 N•mm, the failure limit was 177.07 N, and the failure energy was 942 N•mm. The curve distribution law of the compression characteristic parameters under different cushioning heads is roughly the same. The extreme value is found out in the process the yield limit and the failure limit increasing with the increase of the compression rate. The mechanical damage of fragrant pear placed vertically is less than that of the pear placed horizontally. In the process of packaging, storage and transportation of fragrant pear, the placement position should be considered and the fragrant pear should be subjected to longitudinal stress as far as possible. When foam material is used for packaging, the mechanical damage of fragrant pear is minimal, so foam material should be considered during packaging of fragrant pear. |
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