| 重组竹的耐冲击性能 |
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| 引用本文： | 于子绚,江泽慧,王戈,程海涛,张文福,邱亚新.重组竹的耐冲击性能[J].东北林业大学学报,2012,40(4):46-48. |
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| 作者姓名： | 于子绚 江泽慧 王戈 程海涛 张文福 邱亚新 |
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| 作者单位： | 国际竹藤网络中心 北京 100102 |
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| 基金项目： | 林业公益性行业科研专项，国家农业成果转化项目 |
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| 摘 要： | 探索竹/木复合材料在极端环境中(飓风、雹暴等)对冲击载荷的适应性,并在此基础上进行合理的结构设计。利用Instron 9250HV落锤冲击试验机对毛竹重组竹和竹木复合重组材进行了低速冲击试验,研究了密度和组坯形式对冲击性能和损伤模式的影响,并分析了组坯结构与吸能机制的关系。结果表明:高密度重组竹的耐冲击性能较好,纵横组坯的竹木复合重组材冲击性能优于同密度的重组竹。冲击损伤使重组竹沿纤维方向纵向开裂,导致材料整体失效;而竹木复合重组材的横纵结构抑制了裂纹的扩展,使缺陷仅发生在冲击点附近;落锤出射面表现为层状开裂,具有分层吸能的能量吸收机制。相同密度的竹木复合重组材可以更好地抵抗冲击破坏。
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| 关 键 词： | 重组竹 竹木复合重组材 冲击性能 能量吸收 破坏机制 |
Impact Resistance Properties of Bamboo Scrimber |
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| Yu Zixuan
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Jiang Zehui
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Wang Ge
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Cheng Haitao
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Zhang Wenfu
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Qiu Yaxin.Impact Resistance Properties of Bamboo Scrimber[J].Journal of Northeast Forestry University,2012,40(4):46-48. |
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| Authors: | Yu Zixuan Jiang Zehui Wang Ge Cheng Haitao Zhang Wenfu Qiu Yaxin |
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| Institution: | (International Center for Bamboo and Rattan,Beijing 100102,P.R.China) |
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| Abstract: | Low-velocity impact tests were conducted on bamboo scrimber and bamboo-wood scrimber by Instron Dynatup 9 250 HV drop weight impact testing machines in order to explore the adaptabilities of bamboo-wood composites under impact load in extreme circumstances(hurricane or hail storm) and provide a basis for reasonable structural design.The impact properties and damage mechanisms of the two kinds of materials were investigated.Results show that the impact properties of the bamboo scrimber with high density are better compared with that with low density,while the bamboo-wood scrimber with vertical and horizontal structure is prior to the bamboo scrimber at the same density level.The impact damage results in longitudinal crack along the fiber direction which leads to overall failure of the material.However,the bamboo-wood scrimber with vertical and horizontal structure could restrain the crack propagation,and defects only occur near the impact position,in which the exit plane of the hammer presents a layered cracking,indicating a layered energy absorbing mechanism.The bamboo-wood scrimber with the same density exhibits a strong ability to resist impact damage. |
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| Keywords: | Bamboo scrimber Bamboo-wood scrimber Impact properties Energy absorption Damage mechanisms |
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