| 碳纤维/环氧树脂复合材料动态拉伸试验研究与损伤分析 |
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| 引用本文： | 黄桥平,赵桂平,李杰.碳纤维/环氧树脂复合材料动态拉伸试验研究与损伤分析[J].复合材料学报,2009,26(6):143-149. |
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| 作者姓名： | 黄桥平 赵桂平 李杰 |
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| 作者单位： | 1. 同济大学建筑工程系,上海,200092
2. 西安交通大学航天航空学院,强度与振动教育部重点实验室,西安710049 |
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| 基金项目： | 国家自然科学基金航空联合资助项目 |
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| 摘 要： | 利用MTS试验机和分离式Hopkinson拉杆对2种碳纤维/环氧树脂(T300/epoxy)层合板试件(45/-45)4]S和(0/45/90/-45)2]S进行了准静态(应变率10-5~10-4 s-1)、中速(应变率10-1~101 s-1)和高速(应变率102~104 s-1)冲击拉伸试验。在热力学框架内建立了基于损伤能释放率的弹塑性动力损伤本构模型，用该损伤模型来分析试件的动态拉伸失效过程。模型中提出了3种基本损伤机制(纤维断裂、基体开裂及面内剪切)的演化规律，通过对损伤阈值黏性归一化的方法考虑了应变率对损伤演化的影响。编写了该模型有限元用户材料子程序，并模拟了拉伸试验过程，计算结果表明该模型能够较好地模拟碳纤维/环氧树脂层合板动态拉伸失效过程。
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| 关 键 词： | 碳纤维复合材料 应变率效应 损伤 损伤能释放率 归一化 |
| 收稿时间： | 2008-12-08 |
| 修稿时间： | 2009-03-11 |
Experimental study on carbon fiber/epoxy laminates under dynamic tensile and their damage analysis |
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| HUANG Qiaoping,ZHAO Guiping,LI Jie.Experimental study on carbon fiber/epoxy laminates under dynamic tensile and their damage analysis[J].Acta Materiae Compositae Sinica,2009,26(6):143-149. |
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| Authors: | HUANG Qiaoping ZHAO Guiping LI Jie |
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| Affiliation: | (1. Department of Building Engineering, Tongji University, Shanghai 200092, China;2. School of Aerospace, Xi'an Jiaotong University, MOE Key Laboratory for Strength and Vibration, Xi'an 710049 China) |
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| Abstract: | Tensile tests were carried out on two kinds of carbon fiber/epoxy laminates specimen((45/-45)4]S and (0/45/90/-45)2]S) at quasi-static(strain rate 10-5~10-4 s-1),intermediate(strain rate 10-1~101 s-1) and high strain rate(strain rate 102~104 s-1) using the MTS material machine and tensile split Hopkinson bar.A damage constitutive model based on the damage energy release rate was derived within a thermodynamic framework to analyze the dynamic failure of carbon fiber/epoxy.Three damage evolution laws associ... |
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| Keywords: | carbon fiber reinforced composites strain rate effect damage damage energy release rate regularization |
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