| 引用本文: | 吴海,肖加余,邢素丽,等.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.[点击复制] |
| WU Hai,XIAO Jiayu,XING Suli,et al.The failure experiment of composite T-joints with induced defects under bending load[J].Journal of National University of Defense Technology,2015,37(4):128-136[点击复制] |
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| 含诱导缺陷复合材料T型接头的弯曲失效实验 |
| 吴海, 肖加余, 邢素丽, 文思维, 杨孚标, 杨金水 |
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(国防科技大学 航天科学与工程学院， 湖南 长沙 410073)
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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。 |
| 关键词: 复合材料T型接头 弯曲力学性能 失效过程 界面脱黏 三角区填充率 |
| DOI：10.11887/j.cn.201504022 |
| 投稿日期：2015-04-30 |
| 基金项目:国家自然科学基金资助项目（11202231） |
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| The failure experiment of composite T-joints with induced defects under bending load |
| WU Hai, XIAO Jiayu, XING Suli, WEN Siwei, YANG Fubiao, YANG Jinshui |
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(College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| Bending experiments were carried out to investigate mechanical properties and failure processes of composite T-joints with two defects. The defects of interfacial debonding and fillet-filling ratio were introduced to induce different failure modes of the T-joints. Results suggest that a great diversity exists among the T-joints under various failure modes. The maximum bending load of the intact T-joint is 288.5N, 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 greatly decreases bending mechanical properties of the composite T-joints. |
| Keywords: composite T-joints bending mechanical properties failure process interfacial debonding fillet-filling ratio |
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