| 多向编织碳／碳复合材料的强度与断裂 |
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| 引用本文： | 韩杰才,赫晓东.多向编织碳／碳复合材料的强度与断裂[J].宇航学报,1995,16(1):69-74. |
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| 作者姓名： | 韩杰才 赫晓东 |
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| 作者单位： | 哈尔滨工业大学 |
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| 摘 要： | 本文研究了细编穿刺三向Ｃ／Ｃ复合材料的拉压特性，分析相应的微观破坏模式，实测了Ｃ／Ｃ复合材料中Ｚ向纤维束力学性能的统计分布规律。结果表彰：细编穿刺三向Ｃ／Ｃ复合材料在拉伸和压缩载荷作用下具有双模量和呈现非线性。Ｚ向强度受穿刺纤维束纤维根数和间距控制，用最弱环连接理论考虑Ｚ向纤维强度的统计分布，预报σ－ε关系与实验符合较好。ＸＹ向强度由碳布强度贡献，其破坏主要是碳布层间的拉剪断裂。
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| 关 键 词： | 碳复合材料 断裂机理 统计 强度 航空材料 |
ON THE STRENGTH AND FRACTURE OF 3D CARBON-CARBON COMPOSITES |
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| Han Jiecai,He Xiaodong, Du Shanyi.ON THE STRENGTH AND FRACTURE OF 3D CARBON-CARBON COMPOSITES[J].Journal of Astronautics,1995,16(1):69-74. |
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| Authors: | Han Jiecai He Xiaodong Du Shanyi |
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| Abstract: | The mechanical properties and failure model of 3D carbon/carbon composites under tension and compression were investigated. The statistical analysis of in-situfiber bundle failure was also examined in view of two-parameter Weibull distribution.The results show that 3D C/C composite exhibited the nonlinear stress-strain behaviourand different elastic moduli in tension and compression. The strength depended upon thevolume fraction and spacing of fiber bundles in z-direction. A probablistic model describing the tensile stress -strain curves has been developed. The specimens in x-y directionfailed due to a combination of tensile and bending stresses between the weave fabric reinforcements. |
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| Keywords: | Carbon/Carbon composite Failure mechanisms Statistical strength |
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