碳纤维增强定向刨花板弯曲性能的研究
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摘要
为了提高定向刨花板的性能,利用碳纤维布对定向刨花板进行增强并设计了对比实验。通过对比其力学性能,分析碳纤维布的增强效果,采用无损检测的方法对定向刨花板进行优选以降低木材变异性对实验结果的影响。对定向刨花板进行碳纤维增强研究的方法是分别在板材的上表面贴碳纤维布、下表面贴碳纤维布,以及上下表面均贴碳纤维布,将这三种表面贴碳纤维布的板材与不贴碳纤维布的板材进行对比,通过弯曲实验对不同增强方式的板材进行性能研究。实验结果表明:与不贴碳纤维布的定向刨花板相比,上表面贴碳纤维刨花板的强度增强较小,韧性降低;下表面贴碳纤维的刨花板强度增大明显,韧性大大增加;上下表面都贴碳纤维的刨花板强度和刚性增加最大,是不贴碳纤维刨花板强度和刚性的近3倍,但韧性有所下降。对表面都贴碳纤维刨花板的工艺进行研究,设计了正交实验,通过实验得出了最优工艺为加热温度100℃、加热时间2 h、环氧树脂和固化剂比例为1∶1,其中环氧树脂和固化剂的比例对强度的影响最大。最优工艺下的碳纤维增强刨花板强度相对于未增强的刨花板强度至少提高了15%。
In order to improve the properties of OSB,OSB was reinforced with carbon fiber fabric,and contrast experiments were designed. By comparing its mechanical properties,the reinforcing effects of carbon fiber were analyzed.The OSB was optimized by non-destructive testing to reduce the effect of wood variability on the experimental results.The method for reinforcing OSB with carbon fiber involves sticking carbon fiber cloth to the top surface,the bottom surface,and both top and bottom surfaces,comparing the boards with and without carbon fiber fabric. The properties of the boards strengthened in different ways were studied by bending testing.The results of the bending experiment on OSB show that: compared with the OSB without carbon fiber reinforcement,the OSB with carbon fiber on the upper surface has little strengthen reinforcement effect and lowed toughness;the OSB with carbon fiber on the bottom surface has obviously increased strength and greatly improved toughness; the OSB with carbon fiber on both top and bottom surfaces has the largest strength and stiffness increase,nearly three times the strength and stiffness of OSB without carbon fiber fabric,but with lowered toughness. To study the technological process of the OSB with surface strengthened with carbon fiber cloth,an orthogonal test was designed. The experimental results show the optimal process involving a heating temperature of 100℃,heating temperature of 2 h,1: 1 ratio of epoxy resin and curing agent,and the maximum effect of the 1: 1 ratio of epoxy resin and curing agent on strength. Compared with the OSB not strengthened with carbon fiber cloth,the strength of the OSB reinforced with carbon fiber cloth can increase by at least 15% under the optimal process conditions.
In order to improve the properties of OSB,OSB was reinforced with carbon fiber fabric,and contrast experiments were designed. By comparing its mechanical properties,the reinforcing effects of carbon fiber were analyzed.The OSB was optimized by non-destructive testing to reduce the effect of wood variability on the experimental results.The method for reinforcing OSB with carbon fiber involves sticking carbon fiber cloth to the top surface,the bottom surface,and both top and bottom surfaces,comparing the boards with and without carbon fiber fabric. The properties of the boards strengthened in different ways were studied by bending testing.The results of the bending experiment on OSB show that: compared with the OSB without carbon fiber reinforcement,the OSB with carbon fiber on the upper surface has little strengthen reinforcement effect and lowed toughness;the OSB with carbon fiber on the bottom surface has obviously increased strength and greatly improved toughness; the OSB with carbon fiber on both top and bottom surfaces has the largest strength and stiffness increase,nearly three times the strength and stiffness of OSB without carbon fiber fabric,but with lowered toughness. To study the technological process of the OSB with surface strengthened with carbon fiber cloth,an orthogonal test was designed. The experimental results show the optimal process involving a heating temperature of 100℃,heating temperature of 2 h,1: 1 ratio of epoxy resin and curing agent,and the maximum effect of the 1: 1 ratio of epoxy resin and curing agent on strength. Compared with the OSB not strengthened with carbon fiber cloth,the strength of the OSB reinforced with carbon fiber cloth can increase by at least 15% under the optimal process conditions.
引文
[1]于文吉,张方文,吴大为.定向刨花板市场应用和研究现状及新进展[J].中国人造板,2008,15(9):1-5.
[2]谢静华.定向刨花板生产工艺特点及应用[J].林业机械与木工设备,2010,38(1):43-44.
[3]吴娟,陈天全.我国定向刨花板的现状和开发前景[J].木材加工机械,2004,15(6):38-41.
[4]梅长彤,雍宬.我国定向刨花板工业发展历史、现状和机遇[J].中国人造板,2016,23(3):6-9.
[5]李志强,樊锐,陈五一,等.纤维增强复合材料的机械加工技术[J].航空制造技术,2003(12):34-37.
[6]程芳超,胡英成.纤维增强木梁的性能评价与无损检测[A]//海峡两岸材料破坏/断裂学术会议暨mts材料实验学术会议,2010.
[7] NjugunaJ,PielichowskiK,Alcock J R. EpoxyBased Fibre Reinforced Nanocomposites[J]. Advanced Engineering Materials,2007,9(10):835-847.
[8]易增博.碳纤维增强环氧树脂基复合材料的制备及力学性能研究[D].兰州:兰州交通大学,2015.
[9]李志凯.碳纤维增强复合材料切削实验与仿真研究[D].南昌:南昌航空大学,2014.
[10] Centeno A,Blanco C,Santamaría R,et al. Further studies on the use of Raman spectroscopy and X-ray diffraction for the characterisation of Ti C-containing carbon-carbon composites[J]. Carbon,2012,50(9):3240-3246.
[11]鞠苏,曾竟成,江大志,等.碳纤维增强复合材料接头研究进展[J].高科技纤维与应用,2006,31(3):29-35.
[12]张焕侠.碳纤维表面和界面性能研究及评[D].上海:东华大学,2014.
[13]徐昌华.碳纤维及其复合材料的发展和应用概况[A]//工程塑料优选论文集,1993.
[14] Brandner R,Schickhofer G. Glued laminated timber in bending:new aspects concerning modelling[J]. Wood Science and Technology,2008,42(5):401-425.
[15] Issa C A,Kmeid Z. Advanced wood engineering:glulam beams[J].Construction&Building Materials,2005,19(2):99-106.
[16] Moulin J M,Pluvinage G,Jodin P. FGRG:Fibreglass reinforced gluelam-a new composite.[J]. Wood Science and Technology,1990,24(3):289-294.
[17]钱伯章.国内外碳纤维应用领域、市场需求以及碳纤维产能的进展(2)[J].高科技纤维与应用,2010,35(1):43-46.
[18] Hu Y,Nakao T,Nakai T,et al. Vibrational properties of wood plastic plywood.[J]. Journal of Wood Science,2005,51(1):13-17.
[19]胡英成.木质复合材料的动态特性研究[D].哈尔滨:东北林业大学,2004.
[20]红岭,曹琪,刘瑶,等.单板种类对沙柳复合层积板力学性能影响[J].森林工程,2016,32(5):27-30.
[21]国家技术监督局. GB/T 17657-2013,人造板及饰面人造板理化性能实验方法静曲强度和弹性模量测定(三点弯曲)[S].北京:中国标准出版社,2013.
[2]谢静华.定向刨花板生产工艺特点及应用[J].林业机械与木工设备,2010,38(1):43-44.
[3]吴娟,陈天全.我国定向刨花板的现状和开发前景[J].木材加工机械,2004,15(6):38-41.
[4]梅长彤,雍宬.我国定向刨花板工业发展历史、现状和机遇[J].中国人造板,2016,23(3):6-9.
[5]李志强,樊锐,陈五一,等.纤维增强复合材料的机械加工技术[J].航空制造技术,2003(12):34-37.
[6]程芳超,胡英成.纤维增强木梁的性能评价与无损检测[A]//海峡两岸材料破坏/断裂学术会议暨mts材料实验学术会议,2010.
[7] NjugunaJ,PielichowskiK,Alcock J R. EpoxyBased Fibre Reinforced Nanocomposites[J]. Advanced Engineering Materials,2007,9(10):835-847.
[8]易增博.碳纤维增强环氧树脂基复合材料的制备及力学性能研究[D].兰州:兰州交通大学,2015.
[9]李志凯.碳纤维增强复合材料切削实验与仿真研究[D].南昌:南昌航空大学,2014.
[10] Centeno A,Blanco C,Santamaría R,et al. Further studies on the use of Raman spectroscopy and X-ray diffraction for the characterisation of Ti C-containing carbon-carbon composites[J]. Carbon,2012,50(9):3240-3246.
[11]鞠苏,曾竟成,江大志,等.碳纤维增强复合材料接头研究进展[J].高科技纤维与应用,2006,31(3):29-35.
[12]张焕侠.碳纤维表面和界面性能研究及评[D].上海:东华大学,2014.
[13]徐昌华.碳纤维及其复合材料的发展和应用概况[A]//工程塑料优选论文集,1993.
[14] Brandner R,Schickhofer G. Glued laminated timber in bending:new aspects concerning modelling[J]. Wood Science and Technology,2008,42(5):401-425.
[15] Issa C A,Kmeid Z. Advanced wood engineering:glulam beams[J].Construction&Building Materials,2005,19(2):99-106.
[16] Moulin J M,Pluvinage G,Jodin P. FGRG:Fibreglass reinforced gluelam-a new composite.[J]. Wood Science and Technology,1990,24(3):289-294.
[17]钱伯章.国内外碳纤维应用领域、市场需求以及碳纤维产能的进展(2)[J].高科技纤维与应用,2010,35(1):43-46.
[18] Hu Y,Nakao T,Nakai T,et al. Vibrational properties of wood plastic plywood.[J]. Journal of Wood Science,2005,51(1):13-17.
[19]胡英成.木质复合材料的动态特性研究[D].哈尔滨:东北林业大学,2004.
[20]红岭,曹琪,刘瑶,等.单板种类对沙柳复合层积板力学性能影响[J].森林工程,2016,32(5):27-30.
[21]国家技术监督局. GB/T 17657-2013,人造板及饰面人造板理化性能实验方法静曲强度和弹性模量测定(三点弯曲)[S].北京:中国标准出版社,2013.