徐朝阳,徐德良,贾翀,周兆兵.硬松类木材横纹压缩时能量吸收特性研究[J].包装工程,2014,35(17):11-14,38.
XU Zhao-yang,XU De-liang,JIA Chong,ZHOU Zhao-bing.Energy Absorption Characteristics of Hard Pine during Across-compression[J].Packaging Engineering,2014,35(17):11-14,38. |
| 硬松类木材横纹压缩时能量吸收特性研究 |
| Energy Absorption Characteristics of Hard Pine during Across-compression |
| 投稿时间：2014-05-23 修订日期：2014-09-01 |
| DOI： |
| 中文关键词: 木材 横纹压缩 能量吸收 |
| 英文关键词: wood across-compression energy absorption |
| 基金项目:国家自然科学基金资助项目（31300483）； 江苏省自然科学基金资助项目（BK20130971）； 江苏省苏北科技发展计划（BN2013003）； 江苏高校优势学科建设工程资助项目 |
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| 中文摘要: |
| 目的 研究木材能量吸收特性。 方法 采用横纹压缩试验。 结果 径向横压应力-应变曲线呈现线弹性区、平台区和密实化区等 3 个阶段， 径向横压比例极限大于弦向。 当绝对含水率为 13.1%、径向横压应变为 0.55 时， 能量吸收值和缓冲系数分别为 3.919 MJ· m3和 2.847。 当绝对含水率为 13.1%、弦向横压应变为 0.11 时，吸收能量值和缓冲系数仅为 0.472 MJ· m3和 12.746，且木材已压溃失效。 随着绝对含水率的下降， 横纹压缩强度、吸能能力和径向横压最大吸能效率均呈上升趋势， 最大横纹压缩强度、能量吸收值和径向吸能效率分别为 10.15 MPa， 4.430 MJ· m3和 0.362%， 而弦向横压时吸能效率呈下降趋势。 结论 木材绝对含水率和纹理方向对木材能量吸收有一定影响。 |
| 英文摘要: |
| Objective To investigate the energy absorption capacity of hard pine wood with different moisture content. Methods Across-compression tests were carried out. Results The radial across-compressive stress-strain curve of hard pine was composed of three stages, which were linear elasticity region, platform region and densification region. The proportional limit stress of radial across-compression was higher than that of tangential across-compression. When the absolute moisture content was 13.1% , the energy absorption capacity of radial across-compression and cushioning coefficient were 3.919 MJ· m3 and 2.847 at 0.55 strain, respectively. The energy absorption capacity of tangential across-compression and cushioning coefficient were only 0.472 MJ· m3 and 12.746 at 0.11 strain, respectively. Meanwhile, the wood was completely destroyed. When the absolute moisture content decreased, the across-compressive stress, energy absorption capacity and maximum energy absorption efficiency of radial across-compression were increased. The maximum across-compression strength， energy absorption capacity and energy absorption of radial across-compression were 10.15 MPa， 4.430 MJ· m3 and 0.362%, respectively. However， the energy absorption efficiency of tangential across-compression was decreased when the moisture content decreased. Conclusion The energy absorption capacity of wood was influenced by the absolute moisture content and the direction of wood grain. |
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