| 疲劳/蠕变交互作用下竹木复合层合板断裂损伤研究 |
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| 引用本文： | 李玲,李大纲,徐平,诸学清.疲劳/蠕变交互作用下竹木复合层合板断裂损伤研究[J].北京林业大学学报,2006(Z2). |
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| 作者姓名： | 李玲 李大纲 徐平 诸学清 |
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| 作者单位： | 南京林业大学木材工业学院，南京林业大学木材工业学院，无锡前程木业包装有限公司，无锡前程木业包装有限公司 |
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| 基金项目： | 国家自然科学基金资助项目(30271050) |
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| 摘 要： | 该文研究了在疲劳/蠕变交互作用下竹木复合层合板的断裂损伤行为.结果表明,在交变载荷最大值为竹木复合层合板破坏载荷的75%时,其疲劳/蠕变断裂曲线为三段式曲线;在交变载荷最大值为破坏载荷的55%时,6h内其疲劳/蠕变曲线为两段式曲线.随着蠕变时间的增加,层合板的断裂寿命降低.在交变载荷最大值为破坏载荷的75%时,蠕变时间为300s时,层合板的疲劳/蠕变负交互损伤程度大于蠕变时间为180s的.疲劳/蠕变交互作用下层合板的破坏形式主要为纤维撕裂、界面剪切破坏和层间开裂3种形式的综合表现.
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| 关 键 词： | 竹木复合层合板 疲劳/蠕变 断裂 损伤 |
Fracture damage behavior of wood-bamboo composite board under the mutual action of fatigue and creep |
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| LI Ling, LI Da-gang, XU Ping, ZHU Xue-qing. College of Wood Industry,Nanjing Forestry University,P. R. China, Wuxi Qiancheng Wood Packaging Corp.,Jiangsu Province,P. R. China..Fracture damage behavior of wood-bamboo composite board under the mutual action of fatigue and creep[J].Journal of Beijing Forestry University,2006(Z2). |
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| Authors: | LI Ling LI Da-gang XU Ping ZHU Xue-qing College of Wood Industry Nanjing Forestry University P R China Wuxi Qiancheng Wood Packaging Corp Jiangsu Province P R China |
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| Institution: | LI Ling~1, LI Da-gang~1, XU Ping~2, ZHU Xue-qing~2.1 College of Wood Industry,Nanjing Forestry University,210037,P. R. China, 2 Wuxi Qiancheng Wood Packaging Corp.,Jiangsu Province,214112,P. R. China. |
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| Abstract: | Fracture damage behavior of wood-bamboo composite board under the mutual action of fatigue and creep was studied. Results showed that the curves of fatigue/creep had three stages when the maximum of alternating load was 75% failure load of wood-bamboo composite board. However, the curves had two stages when the maximum of alternating load was 55% failure load. Breaking life lessened when creep time was longer. At 75% failure load, the mutual action of fatigue and creep in the board of 300-seconds creep time was stronger than that in the board of 180-seconds creep time. Under the mutual action of fatigue and creep, the destruction form of the composite board is mainly the syntheses of the fibre fracture, interface destruction and interbedded crack. |
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| Keywords: | wood-bamboo composite board fatigue/creep fracture damage |
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