| 随机取向短纤维增强SMC复合材料疲劳损伤模型 |
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| 引用本文： | 张子龙,张双寅.随机取向短纤维增强SMC复合材料疲劳损伤模型[J].航空学报,1995,16(4):118-121. |
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| 作者姓名： | 张子龙 张双寅 |
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| 作者单位： | 北京航空材研究所７室(张子龙)，中国科学院力学所１２室(张双寅) |
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| 基金项目： | 中国科学院力学所非线性连续介质力学开放试验室资助 |
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| 摘 要： | 讨论了复合材料疲劳损伤的数学描述方法，引用等效模量随疲劳过程的降低作为损伤的度量，借助于连续介质损伤力学ＣＤＭ，建立起损伤速率与循环次数之间的幂函数关系。试验发现，疲劳损伤的演变可分为３个阶段，而在一定的应力水平下，稳定扩展的第２阶段占据主导地位，为从理论上预测疲劳寿命成为可能。
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| 收稿时间： | 1993-09-28; |
A FATIGUE DAMAGE MODEL FOR RANDOM SHORT FIBER COMPOSITE SMC |
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| Zhang Zilong.A FATIGUE DAMAGE MODEL FOR RANDOM SHORT FIBER COMPOSITE SMC[J].Acta Aeronautica et Astronautica Sinica,1995,16(4):118-121. |
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| Authors: | Zhang Zilong |
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| Institution: | 1. Faculty 7, Beijing Institute of Aeronautical Materials Beijing,100095;2. Faculty 12, Institute of Mechanics,Chinese Academy of Sciences Beijing,10080 |
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| Abstract: | The characterization of fatigue damage of composite materials was discussed.The degradation of effective modulus was used as a measurement of damage. Using continuous damage mechanics(CDM) theory, a power relationship is setup between the damage rate (d D /d n ) and cyclic numbers. This provides a well model for the life prediction of composite materials under cyclic loading. Experimental procedures were also performed in order to investigate the damage development during fatigue process.It was found that damage development shows three different stages. This makes it possible to describe fatigue damage theoretically. |
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| Keywords: | composite materials fatigue life impairment mathematical models |
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