以结构用竹杨层积复合材料为研究对象,采用落锤式冲击实验方法,研究垂直和平行层积方式两种冲击方向下的竹杨层积复合材料的冲击性能。结果表明:两种冲击方式下竹杨层积复合材料的冲击韧性、冲击过程和破坏方式均不相同。沿垂直方向冲击持续时间(17.21 ms)大于平行方向(11.37 ms),且垂直方向冲击过程吸收的总能量(524.42 J)也大于平行方向(403.56 J),冲击韧性垂直方向(24.16 J/cm2)优于平行方向(18.64 J/cm2)。由于垂直方向冲击过程中主要由纵向和横向应力波作用,裂纹扩展过程较长,破坏方式主要是弯曲破坏和层间胶层剪切破坏; 而平行方向冲击破坏以纵向应力波作用为主,主要发生弯曲剪切破坏。单元结构和胶合界面是影响竹杨层积复合材料冲击韧性的主要原因。
Abstract
In order to enrich the mechanical base data of bamboo/poplar laminated composites(BPLC)and broaden its application, the impact performance of the BPLC in perpendicular(R direction)and parallel(T direction)to the laminated direction were examined using the falling weight impact method. Results indicated that the impact toughness, impact process and fracture modes of BPLC were different in these two directions. When BPLC was impacted in the R direction, the impact time was longer than that in the T direction(17.21ms and 11.37ms), absorbing more energy(R direction 524.42 J, T direction 403.56 J)and representing higher impact toughness(R direction 24.16 J/cm2, T direction 18.64 J/cm2). In the R direction, the composite was impacted by the perpendicular and parallel stress waves. The crack propagation process extended, leading to bending and shearing fracture which consumed more energy. Thus, the impact toughness in the R direction was better than that in the T direction. However, in the T direction, the main stress wave was in perpendicular direction, corresponding to perpendicular shear fracture. Most failures occurred in the portions of bamboo and the interface between bamboo and poplar, which determined the impact toughness of BPLC.
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参考文献
[1] 江泽慧. 世界竹藤[M]. 沈阳:辽宁科学技术出版社, 2002.
[2] 江泽慧, 王戈, 费本华,等. 竹木复合材料的研究及发展[J]. 林业科学研究, 2002, 15(6): 712-718.Doi:10.3321/j.issn:1001-1498.2002.06.013.
Jiang Z H, Wang G, Fei B H, et al. The research and development on bamboo/wood composite material[J]. Forest Research, 2002,15(6):712-718.
[3] 江泽慧, 孙正军, 任海青. 先进生物质复合材料在风电叶片中的应用[J]. 复合材料学报, 2006, 26(3): 127-129.Doi: 10.3321/j.issn:1000-3851.2006.03.024.
Jiang Z H, Sun Z J, Ren H Q. Application of advanced bio-composites in wind blades[J].Acta Materiae Compositae Sinica, 2006, 26(3): 127-129.
[4] 张叶田, 岳慧. 竹材人造板一种理想的工程结构材料[J]. 建筑技术, 2004(3): 17-18.
Zhang Y T, Yue H. Bamboo panels—An ideal engineering structural material [J]. Architectural Knowledge, 2004(3): 17-18.
[5] 潘毅, 李家佳, 李玲娇,等. 现代竹材在建筑结构中的应用现状[J]. 土木建筑与环境工程, 2011,33(2):115-118.
Pan Y, Li J J, Li L J, et al. Application of the modern bamboo in building structure[J]. Journal of Civil, Architectural & Environmental Engineering, 2011,33(2):115-118.
[6] 江泽慧, 费本华, 王正,等. 新型竹材结构建筑研究初报:结构复合竹材的研究与应用[J].国际木业, 2003(6): 12-17.
Jiang Z H, Fei B H, Wang Z, et al. New bamboo structure research: the study and application of structure bamboo [J]. International Wood Industry, 2003(6): 12-17.
[7] 莫弦丰,关明杰,朱一辛,等. 毛竹的冲击韧性及冲击试样断口形貌[J]. 林业科技开发, 2010, 24(1): 45-47.Doi:10.3969/j.issn.1000-8101.2010.01.011.
Mo X F, Guan M J, Zhu Y X, et al. Fracture pattern and toughness of Maso bamboo[J]. China Forestry Science and Technology, 2010, 24(1): 45-47.
[8] 于子绚, 江泽慧, 王戈,等. 重组竹的耐冲击性能[J]. 东北林业大学学报,2012, 40(4): 46-48.Doi: 10.3969/j.issn.1000-5382.2012.04.011.
Yu Z X, Jiang Z H, Wang G, et al. Impact resistance properties of bamboo scrimber[J]. Journal of Northeast Forestry University, 2012, 40(4): 46-48.
[9] 朱一辛,关明杰,张晓东. 竹材增强杨木单板层积材冲击性能的研究 [J]. 南京林业大学学报(自然科学版),2005, 29(6): 99-102.Doi: 10.3969/j.issn.1000-2006.2005.06.025.
Zhu Y X, Guan M J, Zhang X D. Studies on impact performance of bamboo strengthened laminated veneer lumber of poplar[J]. Journal of Nanjing Forestry University(Natural Science Edition), 2005, 29(6): 99-102.
[10] Maio L, Monaco E, Ricci F, et al. Simulation of low velocity impact on composite laminates with progressive failure analysis[J]. Composite Structures, 2013(103): 75-85.Doi: 10.1016/j.compstruct.2013.02.027.
[11] Apetre N A, Sankar B C, Ambur D R. Low-velocity impact response of sandwich beams with functionally graded core[J]. International Journal of Solids and Structures, 2006(43): 2479-2496.Doi: 10.1016/j.ijsolstr.2005.06.003.
[12] 徐波, 张子汉, 宋焕成. 纤维复合材料及其混杂结构的冲击性能研究 [J]. 材料工程, 1989(2):13-15.
Xu B, Zhang Z H, Song H C. Study on the impact properties of fiber composites and their hybrid structures[J]. Journal of Materials Engineering, 1989(2):13-15.
[13] Yarmohammad T M, Alderliestenb R C, Ghajar R, et al. Experimental investigation on distance effects in repeated low velocity impact on fiber-metal lamina test[J]. Composite Structures, 2013(99): 31-40.Doi: 10.1016/j.compstruct.2012.11.045.
[14] Giovanni B, Roberto V. Low velocity impact tests of laminate glass-fiber-epoxy matrix composite material plates[J]. International Journal of Impact Engineering, 2002(27): 213-229.Doi: 10.1016/S0734-743X(01)00040-9.
[15] 任春雨,朱锡,梅志远. 复合材料层合板冲击模型研究现状[J]. 兵器材料科学与工程, 2005, 28(4): 59-67.Doi:10.3969/j.issn.1004-244X.2005.04.017.
Ren C Y, Zhu X, Mei Z Y.The developments of impact models for laminated composites[J]. Oranance Material Science and Engineering, 2005, 28(4): 59-67.
[16] Shyr T W,Pan Y H.Impact resistance and damage characteristics of composite laminates[J].Composites Structures,2003, 62: 193-203.Doi: 10.1016/S0263-8223(03)00114-4.
基金
基金项目:国际竹藤中心基本科研业务费专项资金项目(1632015001); “十二五”国家科技支撑计划(2012BAD23B01)
第一作者:刘焕荣(liuhuanrong@icbr.ac.cn),副研究员。
*通信作者:张秀标(zhangxb@icbr.ac.cn),助理研究员。
引文格式:刘焕荣,严彦,孙正军,等. 竹杨层积复合材料的冲击性能[J]. 南京林业大学学报(自然科学版),2016,40(6):157-161.
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