| 疲劳对铝基SiC纤维增强复合材料界面性能影响 |
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| 引用本文： | 柳永宁,康伟,何家文,朱祖铭.疲劳对铝基SiC纤维增强复合材料界面性能影响[J].复合材料学报,2001,18(4):42-45. |
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| 作者姓名： | 柳永宁 康伟 何家文 朱祖铭 |
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| 作者单位： | 1.西安交通大学 金属材料强度国家重点实验室, 西安 710049; |
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| 基金项目： | 自然科学重点基金 :铝基层状复合材料界面性能评定及其与疲劳的关系 ( No:5 97310 2 0 )子项目内容之一 |
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| 摘 要： | 采用单纤维碎断法(Fragmentation)及声发射技术研究了富SiO2处理的SiC纤维增强铝基复合材料经一定疲劳载荷后的界面接合强度。发现疲劳与未疲劳状态对实验机刚度的测量影响极大, 这将直接影响纤维断裂强度的计算。采用直接溶出法测量经热压处理的纤维断裂强度,发现复合工艺对纤维的强度没有损耗,这与Clough关系的预测有巨大的差异。经一定周次疲劳后,纤维的临界长度增加,界面接合强度有所降低。
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| 关 键 词： | 复合材料 断裂 声发射 |
| 文章编号： | 1000-3851(2001)04-0042-04 |
| 收稿时间： | 2000-01-08 |
| 修稿时间： | 2000年1月8日 |
EFFECT OF FATIGUE ON INTERFACIAL SHEAR STRENGTH OF SiC FIBER REINFORCED MMC |
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| LIU Yong-ning,KANG Wei,HE Jia-wen,ZHU Zu-ming.EFFECT OF FATIGUE ON INTERFACIAL SHEAR STRENGTH OF SiC FIBER REINFORCED MMC[J].Acta Materiae Compositae Sinica,2001,18(4):42-45. |
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| Authors: | LIU Yong-ning KANG Wei HE Jia-wen ZHU Zu-ming |
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| Affiliation: | 1.State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049,China;2.State Key Laboratory for Fatigue and Fracture of Materials, Institute of Metal Research, Chinese Academy of Sciences |
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| Abstract: | The interfacial shear strength of SiC fiber reinforced aluminum composite treated with SiC 2 was studied by the method of fragmentation and acoustic emission after a certain cycle fatigue loading. The result shows that the pretreatment with fatigue and without fatigue displays a great influence on the stiffness of the test machine which will affect the calculations of fiber strength in composite. The measurement of fiber strength of hot pressed specimens by a dissolving method indicates that the fiber strength does not lose via composite process. The critical length of fiber increases a little after certain cycles of fatigue loading and thus, interfacial shear strength decreases. |
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| Keywords: | composite materials fracture acoustic emission interfacial shear strength |
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