纸瓦楞-蜂窝复合夹层结构的跌落冲击缓冲性能研究 |
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引用本文: | 吉美娟,郭彦峰,付云岗,韩旭香,康健芬,韦青. 纸瓦楞-蜂窝复合夹层结构的跌落冲击缓冲性能研究[J]. 工程力学, 2020, 37(10): 247-256. DOI: 10.6052/j.issn.1000-4750.2019.11.0668 |
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作者姓名: | 吉美娟 郭彦峰 付云岗 韩旭香 康健芬 韦青 |
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作者单位: | 西安理工大学包装工程系,西安 710048 |
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基金项目: | 国家自然科学基金项目(51345008);西安市科技计划(2017080CG/RC043(XALG024));陕西省重点研发计划项目(2018GY-191, 2011CB013600) |
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摘 要: | 针对纸瓦楞与纸蜂窝的复合夹层结构在跌落冲击动态压缩条件下的缓冲防护性能,研究了纸蜂窝厚度对单面、双面复合形式的冲击加速度响应、变形特征和缓冲吸能特性的影响规律。结果表明,瓦楞夹层先压溃,其次是蜂窝夹层,而且较大的蜂窝厚度会引起纸蜂窝芯层的次坍塌行为。在相同冲击质量或冲击能量条件下,同一蜂窝厚度的单面复合夹层结构的单位体积吸能、比吸能和行程利用率较双面复合结构分别增加了7.94%、28.34%和8.47%,但总吸能较于双面复合结构降低了16.12%,单面复合夹层结构的缓冲吸能特性优于双面复合夹层结构,而双面复合夹层结构的抗冲击性能优于单面复合夹层结构。对于纸蜂窝厚度10 mm、15 mm、20 mm和25 mm的复合夹层结构,低冲击能量作用下蜂窝厚度的增加降低了结构的缓冲吸能特性,高冲击能量作用下蜂窝厚度的增加提高能量吸收能力。纸蜂窝厚度10 mm、15 mm、20 mm和25 mm的复合夹层结构的比吸能、单位体积吸能和行程利用率是蜂窝厚度70 mm的复合夹层结构的1倍~3倍,较低厚度的纸蜂窝更有利于复合夹层结构的缓冲吸能。
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关 键 词: | 纸蜂窝 纸瓦楞 复合夹层结构 跌落冲击 缓冲吸能特性 |
收稿时间: | 2019-11-19 |
STUDY ON DROP IMPACT CUSHIONING PERFORMANCE OF PAPER CORRUGATED-HONEYCOMB COMPOSITE SANDWICH STRUCTURE |
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Affiliation: | Department of Packaging Engineering, Xi'an University of Technology, Xi'an 710048, China |
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Abstract: | Aiming at the cushioning and protection performance of the composite sandwich structure of paper corrugated and paper honeycomb under the condition of drop impact dynamic compression, the effects of paper honeycomb thickness on the impact acceleration response, on deformation characteristics and cushioning energy absorption characteristics of single-sided and double-sided composite forms were studied. The studying results show that, the corrugation layer gets crushed first, then the honeycomb layer, moreover larger honeycomb thickness will cause the secondary collapse of the paper honeycomb core layer. Under the same impact energy or mass, the cushioning energy absorbing characteristics of single-sided composite layered structures with the same honeycomb thickness are better than those of the double-sided composite layered structures, and the impact resistance of double-sided composite layered structures is better than that of the single-sided structures. For the composite layered structures with the honeycomb thicknesses of 10 mm, 15 mm, 20 mm, and 25 mm, the increase of honeycomb thickness decreases the cushioning energy absorption of the structure under low energy of drop impact, while the increase of honeycomb thickness reinforces the energy absorption capacity under the high energy of drop impact. The specific energy absorption, unit volume energy absorption and stroke utilization of the composite sandwich structure with paper honeycomb thickness of 10 mm, 15 mm, 20 mm and 25 mm are 1~3 times higher than that of the composite sandwich structure with honeycomb thickness of 70 mm. The paper honeycomb with lower thickness is more beneficial to the cushioning energy absorption of the composite sandwich structure. |
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