| 圆弧形单向纤维增强树脂复合材料的I型层间断裂韧性测试及分析 |
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| 引用本文： | 康永胜,张小章,王黎明,李武胜.圆弧形单向纤维增强树脂复合材料的I型层间断裂韧性测试及分析[J].复合材料学报,2021,38(9):2904-2913. |
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| 作者姓名： | 康永胜 张小章 王黎明 李武胜 |
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| 作者单位： | 1.清华大学 工程物理系，北京 100084 |
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| 摘 要： | 层合板的I型层间断裂韧性的测量方法通常为单向纤维增强树脂复合材料的末端切口(End notched flexure, ENF)试样的双悬臂梁(Double cantilever beam, DCB)试验。为了得到带有弧度的层合复合材料结构的I型层间断裂韧性，对圆弧形末端切口(Arc-ENF)试样进行DCB试验。基于梁的弯曲理论和Irwin-Kies公式得到Arc-ENF试样的柔度公式与I型临界能量释放率GIC公式，并且利用ABAQUS软件对DCB试验进行数值模拟。最终，通过对比分析理论公式计算结果、数值模拟结果和DCB试验结果来验证柔度公式和GIC公式的合理性和有效性，对带有任意弧度的DCB试样的I型层间断裂韧性的测试与分析具有参考价值。
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| 关 键 词： | Arc-ENF试样 柔度 层间断裂韧性 数值模拟 DCB试验 |
| 收稿时间： | 2020-10-12 |
Test and analysis of the mode I delamination toughness of arc unidirectional fiber-reinforced resin composites |
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| Affiliation: | 1.Department of Engineering Physics, Tsinghua University, Beijing 100084, China2.Institute of Physical and Chemical Engineering of Nuclear Industry, Tianjin 300180, China |
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| Abstract: | The test method for mode I delamination toughness of composite layers was the double cantilever beam (DCB) test with end notched flexure (ENF) specimen of unidirectional fiber-reinforced resin composites. In order to obtain the mode I delamination toughness of composite structures with curvature, the DCB test was used on the Arc-ENF specimen. The formulas of compliance and GIC for Arc-ENF specimen were derived by using beam bending theory and Irwin-Kies formula, and the numerical simulation of the DCB test was finished with ABAQUS. Finally, The formulas of compliance and GIC are proved to be reasonable and effective by comparing the results of theory formulas, numerical simulation and the DCB test, which have reference value for the test and analysis of mode I delamination toughness of DCB specimens with any curvature. |
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