| 含诱导缺陷复合材料T型接头的弯曲失效实验 |
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| 引用本文： | 吴海,肖加余,邢素丽,文思维,杨孚标,杨金水. 含诱导缺陷复合材料T型接头的弯曲失效实验[J]. 国防科技大学学报, 2015, 37(4): 128-136 |
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| 作者姓名： | 吴海 肖加余 邢素丽 文思维 杨孚标 杨金水 |
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| 作者单位： | 国防科学技术大学,国防科学技术大学航天科学与工程学院,国防科学技术大学航天科学与工程学院,国防科学技术大学航天科学与工程学院,国防科学技术大学航天科学与工程学院,国防科学技术大学航天科学与工程学院 |
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| 基金项目： | “十二五”装备预先研究项目；国家自然科学基金资助项目(11202231)。作者介绍：吴海(1986-),男,博士研究生,E-mail：hongwugong86@163.com,Tel：15274880716； 肖加余(1956-),男,教授,博士,博士生导师,E-mail：Jiayuxiao@tom.com。 ,肖加余2,邢素丽,文思维,杨孚标,杨金水 |
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| 摘 要： | 通过实验研究含不同诱导缺陷的复合材料T型接头的弯曲力学性能和失效过程,采用引入脱黏缺陷和三角区填充率缺陷来诱导T型接头的不同失效模式。结果表明不同失效模式下T型接头所表现出来的弯曲力学性能差异极大,完好的T型接头所能承受的载荷为288.5N,界面脱黏会削弱其30%的承载能力,而三角区填充率的减少会导致裂纹在填充区内部引发和扩展,导致T型接头的弯曲力学性能大幅降低。
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| 关 键 词： | T型接头 弯曲力学性能 失效过程 界面脱粘 三角区填充率 |
| 收稿时间： | 2015-04-30 |
Experimental Study on the Bending Failure of Composite T-joints withInduced Defects |
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| WU Hai,XIAO Jiayu,XING Suli,WEN Siwei,YANG Fubiao and YANG Jinshui. Experimental Study on the Bending Failure of Composite T-joints withInduced Defects[J]. Journal of National University of Defense Technology, 2015, 37(4): 128-136 |
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| Authors: | WU Hai XIAO Jiayu XING Suli WEN Siwei YANG Fubiao YANG Jinshui |
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| Affiliation: | College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China,College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China,College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China,College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China,College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China and College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China |
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| Abstract: | Bending experiments have been carried out to investigate mechanical properties and failure processes of composite T-joints with two defects. The defects of interfacial debonding and reduced fillet-filling ratio were introduced to induce different failure modes of the T-joints. Results suggest that a great diversity brings on among the T-joints under various failure modes. The maximum bending load of the intact T-joint is 303.8N, while interfacial debonding will reduce its carrying capacity by 30%. The reduction of the fillet-filling ratio leads to the initiation and propagation of the cracks in the fillet, which decreases bending mechanical properties of the composite T-joints. |
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| Keywords: | Composite T-joints Bending mechanical properties Failure process Interfacial debonding Fillet-filling ratio |
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