| 湿效应对竹木复合材料刚度性能的影响 |
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| 引用本文： | 王泉中,张晓冬,周雪华.湿效应对竹木复合材料刚度性能的影响[J].浙江林学院学报,2010,27(4):591-594. |
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| 作者姓名： | 王泉中 张晓冬 周雪华 |
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| 作者单位： | 1. 南京林业大学,机械电子工程学院,江苏南京210037
2. 南京林业大学,竹材工程研究中心,江苏南京210037 |
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| 基金项目： | 国家高新技术发展计划(863计划)资助项目 |
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| 摘 要： | 首先根据经典层合板理论和一阶剪切变形理论的基本假设，建立起相关的位移模式，进一步推导出考虑湿效应下竹木复合层合梁的势能函数表达式，然后运用材料力学的等效梁理论推导出考虑湿效应下的竹木复合层合梁的等效弹性模量。比较了不同理论下湿效应前后的等效弹性模量与弯曲变形。研究表明，吸湿比例达30%时，竹木复合材料的等效弹性模量损失逾一半，而同样载荷下弯曲变形则是原有的2倍。图1表3参8
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| 关 键 词： | 林业工程 竹木复合层合板 湿效应 经典理论 一阶剪切变形理论 |
Hygro-effect on stiffness properties for a wood-bamboo composite laminate |
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| WANG Quan-zhong,ZHANG Xiao-dong,ZHOU Xue-hua.Hygro-effect on stiffness properties for a wood-bamboo composite laminate[J].Journal of Zhejiang Forestry College,2010,27(4):591-594. |
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| Authors: | WANG Quan-zhong ZHANG Xiao-dong ZHOU Xue-hua |
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| Institution: | 1. College of Electronic and Mechanical Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu, China; 2. Bamboo Engineering and Research Centre, Nanjing Forestry University, Nanjing 210037, Jiangsu, China) |
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| Abstract: | To determine the potential energy function derived from a wood-bamboo composite laminate employing the hygro-effect, a displacement model was established based on assumptions of the classical laminated plate theory （CLPT） and the first-order shear deformation theory （FSDT）. Then, the equivalent elastic modulus of wood-bamboo composite laminate with the hygro-effect was derived according to the equal beam theory. Using several theories, a comparison of the equivalent elastic modulus and bending deformation was made before and after the hygro-effect was used. Results showed when moisture concentration increased up to 30%, the equivalent elastic modulus of bamboo and wood composite materials decreased more than half, and under the same load, bending deformation was twice that of the original. |
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| Keywords: | forest engineering wood-bamboo composite laminate hygro-effect classical laminated plate theory first-order shear deformation theory |
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