发泡聚丙烯材料的动态力学行为研究
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摘要
目的研究发泡聚丙烯材料的厚度对其冲击性能的影响。方法对4种不同厚度的发泡聚丙烯材料进行动态压缩试验,分析其接触力、最大位移、最大应变以及吸收能,研究动态条件下发泡聚丙烯材料的力学性能。结果当冲击能一定时,增加发泡聚丙烯材料的厚度,其接触力会逐渐减小,接触时间会逐渐增加;冲击能和厚度一定时,厚度与最大位移、吸收能成正比例相关,但对最大接触力和最大应变无明显影响;任意厚度的发泡聚丙烯材料,其冲击能和厚度的增加会导致其最大接触力、最大位移、最大应变、吸收能的增加。结论在研究的冲击能量和厚度范围内,吸收能不受发泡聚丙烯材料厚度的影响,由冲击能决定。
The work aims to study the influence of thickness of expanded polypropylene material on its impact performance. The dynamic compression tests were carried out on four kinds of expanded polypropylene materials with different thicknesses to analyze their contact force, maximum displacement, maximum strain and absorption energy. The mechanical properties of expanded polypropylene material under dynamic conditions were studied. When the impact energy was constant, the contact force would decrease gradually and the contact time would increase gradually as the thickness of the expanded polypropylene material increased. When the impact energy and thickness were constant, the thickness was directly proportional to the maximum displacement and absorption energy, but had no obvious influence on the maximum contact force and maximum strain. The increase of impact energy and thickness of expanded polypropylene material of any thickness would lead to the increase of its maximum contact force, maximum displacement, maximum strain and absorption energy. Within the range of impact energy and thickness studied, the absorption energy is not affected by the thickness of expanded polypropylene material, but is determined by impact energy.
The work aims to study the influence of thickness of expanded polypropylene material on its impact performance. The dynamic compression tests were carried out on four kinds of expanded polypropylene materials with different thicknesses to analyze their contact force, maximum displacement, maximum strain and absorption energy. The mechanical properties of expanded polypropylene material under dynamic conditions were studied. When the impact energy was constant, the contact force would decrease gradually and the contact time would increase gradually as the thickness of the expanded polypropylene material increased. When the impact energy and thickness were constant, the thickness was directly proportional to the maximum displacement and absorption energy, but had no obvious influence on the maximum contact force and maximum strain. The increase of impact energy and thickness of expanded polypropylene material of any thickness would lead to the increase of its maximum contact force, maximum displacement, maximum strain and absorption energy. Within the range of impact energy and thickness studied, the absorption energy is not affected by the thickness of expanded polypropylene material, but is determined by impact energy.
引文
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[2]张泉.发泡聚丙烯生产技术与市场分析[J].橡塑技术与装备,2016,42(4):20-23.ZHANG Quan.Production Technology and Market Analysis of Foamed Polypropylene[J].Plastics Technology and Equipment,2016,42(4):20-23.
[3]靳新慧.发泡聚丙烯的制备及其表征[J].化工管理,2018(11):66-67.JIN Xin-hui.Preparation and Characterization of Foamed Polypropylene[J].Chemical Enterprise Management,2018(11):66-67.
[4]郑梯和,刘爱学,张志军.聚丙烯共混发泡材料研究进展[J].塑料科技,2009,37(10):84-87.ZHENG Ti-he,LIU Ai-xue,ZHANG Zhi-jun.Research Progress on PP Blend Foaming Material[J].Plastics Science and Technology,2009,37(10):84-87.
[5]LIU Q,FU J,MA J,et al.Axial and Lateral Crushing Responses of Aluminum Honeycombs Filled with EPPFoam[J].Composites Part B Engineering,2017,130:236-247.
[6]MAHMOUDABADI M Z,SADIGHI M.A Study on the Static and Dynamic Loading of the Foam Filled Metal Hexagonal Honeycomb-Theoretical and Experimental[J].Materials Science&Engineering A,2011,530(12):333-343.
[7]LEE Y S,PARK N H,YOON H S.Dynamic Mechanical Characteristics of Expanded Polypropylene Foams[J].Journal of Cellular Plastics,2010,46(1):43-55.
[8]CRONIN D S,OUELLET S.Low Density Polyethylene,Expanded Polystyrene and Expanded Polypropylene:Strain Rate and Size Effects on Mechanical Properties[J].Polymer Testing,2016,53:40-50.
[9]BLEDZKI A K,FARUK O.Injection Moulded Microcellular Wood Fiber-polypropylene Composites[J].Composites Part A Applied Science&Manufacturing,2006,37(9):1358-1367.
[10]宋吉威.微发泡聚丙烯材料力学性能研究及其模拟[D].贵阳:贵州师范大学,2015.SONG Ji-wei.Mechanical Performance Research and Simulation of Micro-foaming Polymer[D].Guiyang:Guizhou Education University,2015.
[11]沈训乐.发泡缓冲材料本构模型研究及其CAD应用[D].西安:陕西科技大学,2012.SHEN Xun-le.Research and Its CAD Applications of Constitutive Model of Cushioning Packaging Materials[D].Xi'an:Shaanxi University of Science&Technology,2012.
[12]霍银磊.低密度泡沫塑料的结构及其力学行为研究[D].无锡:江南大学,2008.HUO Yin-lei.The Study of Structure and Mechanics Behavior of Low Density Foamed Plastics[D].Wuxi:Jiangnan University,2008.
[13]BOUIX R,VIOT P,LATAILLADE J L.Polypropylene Foam Behaviour under Dynamic Loadings:Strain Rate,Density and Microstructure Effects[J].International Journal of Impact Engineering,2009,36(2):329-342.
[14]GT/B 8167-2008,包装用缓冲材料动态压缩试验方法[S].GB/T 8167-2008,Testing Method of Dynamic Compression for Packaging Cushioning Materials[S].
[15]SANCHEZ-SAEZ S,GARCIA-CASTILLO S K,BARBERO E,et al.Dynamic Crushing Behaviour of Agglomerated Cork[J].Materials&Design,2015,65:743-748.
[16]LANDRO L,SALA G,OLIVIERI D.Deformation Mechanisms and Energy Absorption of Polystyrene Foams for Protective Helmets[J].Polymer Testing,2002,21(2):17-28.
[17]VIOT P,BEANI F,LATAILLADE J L.Polymeric Foam Behavior under Dynamic Compressive Loading[J].Journal of Materials Science,2005,40:29-37.
[18]张静静,陈满儒,孙德强.蜂窝纸板异面动态冲击性能的实验分析[J].包装工程,2017,38(23):106-110.ZHANG Jing-jing,CHEN Man-ru,SUN De-qiang.Experimental Analysis of Out-of-plane Dynamic Impact Properties of Honeycomb Paperboard[J].Packaging Engineering,2017,38(23):106-110.