Static Pressure Damage Characteristics of Korla Pear under Different Cushioning Head

SHI Guang-qiang, TIAN Yong-hao, WU Jian-bang, YANG Feng, ZHANG Cun-yong, LIU Yang, ZHAO Jin-fei, ZHANG Hong

Packaging Engineering ›› 2020 ›› Issue (1) : 51-57.

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Packaging Engineering ›› 2020 ›› Issue (1) : 51-57. DOI: 10.19554/j.cnki.1001-3563.2020.01.008

Static Pressure Damage Characteristics of Korla Pear under Different Cushioning Head

  • SHI Guang-qiang1, LIU Yang1, ZHAO Jin-fei1, ZHANG Hong1, TIAN Yong-hao2, WU Jian-bang2, YANG Feng2, ZHANG Cun-yong2
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Abstract

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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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(1): 51-57 https://doi.org/10.19554/j.cnki.1001-3563.2020.01.008
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