| 木塑复合材料疲劳性能的研究 |
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| 引用本文： | 程羽,郭成,景成芳,金浩,叶克林.木塑复合材料疲劳性能的研究[J].复合材料学报,2001,18(4):119-122. |
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| 作者姓名： | 程羽 郭成 景成芳 金浩 叶克林 |
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| 作者单位： | 1. 西安交通大学机械工程学院,西安,710049
2. 中国林业科学院木材工业研究所,100091 |
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| 基金项目： | 林业部木材科学技术重点实验室开放基金资助项目 |
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| 摘 要： | 研究了杨木和桦木两种不同结构的木材与木塑复合材料(WPC)的疲劳性能和疲劳裂纹的扩展机理。研究结果表明,WPC的最大应力与循环寿命的对数呈线性关系;木材的疲劳载荷随树脂含量的增加呈线性增大,杨木的S-N曲线斜率受树脂含量的影响,疲劳裂纹沿木纤维方向扩展。桦木塑料复合材料(PC>30wt.％)疲劳裂纹以"Z"字型方式扩展。
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| 关 键 词： | 木塑复合材料 疲劳性能 裂纹扩展 |
| 文章编号： | 1000-3851(2001)04-0119-04 |
| 收稿时间： | 1999-12-17 |
| 修稿时间： | 1999年12月17 |
FATIGUE PROPERTIESOF WOOD PLASTIC COMPOSITES |
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| CHENG Yu,GUO Cheng,JING Cheng-fang,JING Zhi-hao,YE Ke-Lin.FATIGUE PROPERTIESOF WOOD PLASTIC COMPOSITES[J].Acta Materiae Compositae Sinica,2001,18(4):119-122. |
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| Authors: | CHENG Yu GUO Cheng JING Cheng-fang JING Zhi-hao YE Ke-Lin |
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| Affiliation: | 1. Xi'an Jiaotong University, Xi'an 710049,China;
2. Chinese Academy of Forestry, Beijing 100091,China |
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| Abstract: | The fatigue properties of two types of wood (P. Ussurensis and B. Platyphylla) and wood plastic composites were analyzed by three point bend fracture testing, and fatigue crack propagation models were investigated. Test results show that the maximum stress of wood plastic composites presents a linear relationship with logarithmic fatigue life. Fatigue load increases linearly with enhanced polymer content. For P. Ussurensis, the slope of S N fatigue curve is influenced by polymer content in wood, and fatigue crack grows along wood fibre. For B. Platyphylla plastic composites (PC>30 wt.%), fatigue crack grows in the shape of 'Z' along the height of the specimen. |
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| Keywords: | wood plastic composites fatigue properties crack propagation |
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