| 非直纤维的细观动态拔出模型分析 |
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| 引用本文： | 徐松林,唐志平,戴翔宇,郭扬波.非直纤维的细观动态拔出模型分析[J].复合材料学报,2004,21(1):109-113. |
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| 作者姓名： | 徐松林 唐志平 戴翔宇 郭扬波 |
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| 作者单位： | 中国科学院 材料的力学行为与设计重点实验室, 合肥 230026;中国科学技术大学 力学和机械工程系, 合肥 230026 |
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| 基金项目： | 国家自然科学青年基金(No.10202022)，冲击波物理和爆轰波物理国家重点实验室，中国科学院材料的力学行为和设计重点实验室资助。 |
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| 摘 要： | 在Chanvillard关于非直纤维静态拔出模型基础上,建立非直纤维的细观动态模型。此模型通过纤维与基体接触界面剪应力的传递考虑纤维的动态拔出过程,并考虑应变率效应。同时,适当选取阈值,建立基于细观损伤演化的纤维脱粘和拔出动态模型。此模型可以很好地模拟Chanvillard关于非直纤维的静态实验结果,并能反映复合材料的应变率影响。
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| 关 键 词： | 细观动态模型 拔出行为 非直纤维 |
| 文章编号： | 1000-3851(2004)01-0109-05 |
| 收稿时间： | 2002-10-29 |
| 修稿时间： | 2003-05-12 |
DYNAMIC MESO-SCALE MODEL OF THE PULLOUT BEHAVIOR FOR A NON-STRAIGHT FIBER |
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| XU Songlin,TANG Zhiping,DAI Xiangyu,GUO Yangbo.DYNAMIC MESO-SCALE MODEL OF THE PULLOUT BEHAVIOR FOR A NON-STRAIGHT FIBER[J].Acta Materiae Compositae Sinica,2004,21(1):109-113. |
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| Authors: | XU Songlin TANG Zhiping DAI Xiangyu GUO Yangbo |
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| Affiliation: | Key Laboratory for Mechanical Behavior and Design of Materials (LMBD), CAS,Hefei 230026,China;Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026,China |
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| Abstract: | A dynamic meso-scale model for non-straight steel fiber is proposed on the work of Chanvillard G. The model is time-dependent and related to the impact loading through the interfacial shearing stress along the embedded part of the steel fiber. Thus, properly setting the thresholds, a dynamic model of the fiber's debonding and pullout process considering the evolution of meso-damage is eventually constructed. The rate sensitivity of the reinforcing effect of the steel fibers can be demonstrated in this model. The model prediction fits the experimental data of Chanvillard G for non-straight steel fiber under static condition well. |
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| Keywords: | dynamic meso-scale model pullout behavior non-straight fiber |
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