单板层积材-木粉/高密度聚乙烯共挤出复合材料抗低速冲击性能
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摘要
通过共挤出技术制备具有核壳结构的共挤出复合材料,其中壳层为木粉/高密度聚乙烯(W/HDPE),核层为杨木单板层积材(LVL),测试了LVL-W/HDPE和LVL在50J、75J及100J能量下的低速冲击性能,并进一步研究水煮-冰冻-干燥环境处理后两者的低速冲击性能。结果表明,与LVL相比,在50J能量冲击过程中LVL-W/HDPE的吸收能量和损伤深度分别降低2.9%和15.9%;在75J能量冲击过程中LVL-W/HDPE的吸收能量和损伤深度分别降低3.9%和9.2%;而在100J能量冲击下,两者的抗冲击性能基本相同;经水煮-冰冻-干燥环境处理后,由于壳层WPC的保护作用,LVL-W/HDPE不仅保持了良好的抗冲击性能,还表现出了优异的耐环境性能。
The core-shell structure composites were prepared by co-extrusion technology with the wood/high density polyethylene(W/HDPE)as shell layer and the poplar laminated veneer lumber(LVL)as core layer.Both of the LVL-W/HDPE and LVL were treated with boiled-frozen-dry environment at one cycle,and the low velocity impact property was investigated at three different impact energies of 50 J,75 Jand 100 J.The results indicate that the absorption energy and damage depth of LVL-W/HDPE was decrease by 2.9% and 15.9%,respectively,compared with LVL at the impact energy of 50 J.And the decreasing magnitude of the absorption energy and damage depth are about 3.9% and 9.2% at 75 J.While the results are almost the same at 100 J.The treated results also prove that the LVL-W/HDPE has better environmental resistance as well as impact property because of the presence of the protection shell layer.
The core-shell structure composites were prepared by co-extrusion technology with the wood/high density polyethylene(W/HDPE)as shell layer and the poplar laminated veneer lumber(LVL)as core layer.Both of the LVL-W/HDPE and LVL were treated with boiled-frozen-dry environment at one cycle,and the low velocity impact property was investigated at three different impact energies of 50 J,75 Jand 100 J.The results indicate that the absorption energy and damage depth of LVL-W/HDPE was decrease by 2.9% and 15.9%,respectively,compared with LVL at the impact energy of 50 J.And the decreasing magnitude of the absorption energy and damage depth are about 3.9% and 9.2% at 75 J.While the results are almost the same at 100 J.The treated results also prove that the LVL-W/HDPE has better environmental resistance as well as impact property because of the presence of the protection shell layer.
引文
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[2]张广成,何祯,刘良威,等.夹层结构复合材料低速冲击试验与分析[J].复合材料学报,2012,29(4):170-177.ZHANG G C,HE Z,LIU L W,et al.Low-velocity impact experiment and analysis of sandwich structure composite[J].Acta Materiae Compositae Sinica,2012,29(4):170-177(in Chinese).
[3]HAZIZAN M A,CANTWELL W J.The low velocity impact response of an aluminium honeycomb sandwich structure[J].Composites Part B:Engineering,2003,34(8):679-687.
[4]VILLANUEVA G R,CANTWELL W J.The high velocity impact response of composite and FML-reinforced sandwich structures[J].Composites Science and Technology,2004,64(1):35-54.
[5]SCHUBEL P M,LUO J J,DANIEL I M.Low velocity impact behavior of composite sandwich panels[J].Composites Part A:Applied Science and Manufacturing,2005,36(10):1389-1396.
[6]ZHANG J,QIN Q,XIANG C,et al.Dynamic response of slender multilayer sandwich beams with metal foam cores subjected to low-velocity impact[J].Composite Structures,2016,153(12):614-623.
[7]江大志,郭洋,李长亮,等.双层夹芯复合材料结构横向冲击响应实验[J].爆炸与冲击,2009,29(6):590-595.JIANG D Z,GUO Y,LI C L,et al.Experimental investigation on response of two-core sandwich composite structures under transverse impact[J].Explosion and Shock Waves,2009,29(6):590-595(in Chinese).
[8]DANIEL I M,ABOT J L,SCHUBEL P M,et al.Response and damage tolerance of composite sandwich structures under low velocity impact[J].Experimental Mechanics,2011,52(1):37-47.
[9]MORAIS W A D,MONTEIRO S N,D’ALMEIDA J R M.Evaluation of repeated low energy impact damage in carbonepoxy composite materials[J].Composite Structures,2005,67(3):307-315.
[10]HACHEMANE B,ZITOUNE R,BEZZAZI B,et al.Sandwich composites impact and indentation behaviour study[J].Composites Part B:Engineering,2013,51(4):1-10.
[11]KHALILI S M R,SOROUSH M,DAVAR A,et al.Finite element modeling of low-velocity impact on laminated composite plates and cylindrical shells[J].Composite Structures,2011,93(5):1363-1375.
[12]YANG P,SHAMS S S,SLAY A,et al.Evaluation of temperature effects on low velocity impact damage in composite sandwich panels with polymeric foam cores[J].Composite Structures,2015,129(6):213-223.
[13]龚海亮,刘伟庆,万里,等.低速冲击作用下泡桐木夹层梁界面分层损伤机理[J].材料科学与工程学报,2013,31(5):723-727.GONG H L,LIU W Q,WAN L,et al.Interface delamination damage mechanism of paulownia wood sandwich beams under low-velocity impact[J].Journal of Materials Science&Engineering,2013,31(5):723-727(in Chinese).
[14]谭年富.复合材料泡沫夹层结构低速冲击后的面内力学性能研究[D].上海:上海交通大学,2012.TAN N F.Mechanical properties of foam sandwich composites with low-velocity impact damage[D].Shanghai:Shanghai Jiao Tong University,2012(in Chinese).
[15]YANG B,WANG Z,ZHOU L,et al.Study on the low-velocity impact response and CAI behavior of foam-filled sandwich panels with hybrid facesheet[J].Composite Structures,2015,132(14):1129-1140.
[16]中华人民共和国国家质量监督检疫总局.人造板及饰面人造板理化性能试验方法:GB/T 17657—2013[S].北京:中国标准出版社,2013.General Administration of Quality Supervision,Inspection and Quarantine of the People’s Republic of China.Test methods of evaluating the properties of wood-based panels and surface decorated wood-based panels:GB/T 17657—2013[S].Beijing:China Standards Press,2013(in Chinese).
[17]American Society for Testing and Materials International.Standard test method for measuring the damage resistance of a fiber-reinforced polymer matrix composite to a drop-weight impact event:ASTM D7136—2005[S].West Conshoohocken:ASTM International,2005.
[18]张典堂,陈利,孙颖,等.UHMWPE/LLDPE复合材料层板低速冲击及冲击后压缩性能实验研究[J].复合材料学报,2013,30(s1):107-111.ZHANG D T,CHEN L,SUN Y,et al.Low velocity impact and residual compressive strength after impact properties of UHMWPE/LLDPE composite laminates[J].Acta Materiae Compositae Sinica,2013,30(s1):107-111(in Chinese).
[19]李坚.生物质复合材料学[M].北京:科学出版社,2008.LI J.Science of biomass composites[M].Beijing:Science Press,2008(in Chinese).
[20]STOKKE D D,GARDNER D J.Fundamental aspects of wood as a component of thermoplastic composites[J].Journal of Vinyl and Additive Technology,2003,9(2):96-104.
[21]MISHRA S,JAGMOHAN V.Effect of eompatibilizers on water absorption kinetics of polypropylene/wood flour foamed composites[J].Journal of Applied Polymer Science,2006,101(4):2530-2537.
[22]NAJAFI S K,TAJVIDI M,HAMIDINA E.Effect of temperature,plastic type and virginity on the water uptake of sawdust/plastic composites[J].European Journal of Wood and Wood Products,2007,65(5):377-382.
[23]王伟宏,宋永明,高华,等.木塑复合材料[M].北京:科学出版社,2010.WANG W H,SONG Y M,GAO H,et al.Wood-plastic composites[M].Beijing:Science Press,2010(in Chinese).
[24]薛盘芳.PP/木质纤维复合材料的制备及其性能研究[D].南京:南京农业大学,2008.XUE P F.Study on the preparation and properties of PP composites filled with lignocellulose[D].Nanjing:Agricultural University of Nanjing,2008(in Chinese).