| 考虑压头曲率半径的J2形变理论压痕有限元分析 |
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| 引用本文： | 陶彩军,王自强,陈少华.考虑压头曲率半径的J2形变理论压痕有限元分析[J].固体力学学报,2005,26(1):115-120. |
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| 作者姓名： | 陶彩军 王自强 陈少华 |
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| 作者单位： | 中国科学院力学研究所,LNM,北京,100080;中国科学院力学研究所,LNM,北京,100080;中国科学院力学研究所,LNM,北京,100080 |
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| 基金项目： | 国家自然科学基金(10272103)和(10202023)资助. |
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| 摘 要： | 采用经典J2形变理论，在考虑压头曲率半径的前提下，针对几组微压痕实验进行了有限元数值模拟，给出理论计算结果并与实验进行了系统比较．结果发现考虑了压头曲率半径后的经典J2形变理论得到的整段计算曲线不能和实验曲线吻合，可以推理出即使考虑压头曲率半径的的影响，经典J2形变理论也不能很好地解释实验现象．
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| 关 键 词： | 尺度效应 微压痕实验 经典J2形变理论 压头曲率半径 |
| 修稿时间： | 2003年12月9日 |
INFLUENCE OF INDENTER TIP RADIUS ON MICRO-INDENTATION HARDNESS |
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| Tao Caijun,Wang Tzuchiang,Chen Shaohua.INFLUENCE OF INDENTER TIP RADIUS ON MICRO-INDENTATION HARDNESS[J].Acta Mechnica Solida Sinica,2005,26(1):115-120. |
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| Authors: | Tao Caijun Wang Tzuchiang Chen Shaohua |
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| Abstract: | Recent studies show that materials display a great increase in hardness when the characteristic length scale is on the order of microns, known as the indentation size effects.This paper inversitigates the effect of the indenter tip radius of curvature on the micro indentation hardness by using finite element method with conventional plasticity theory.The predicted load and hardness based on the conventional J 2 theory do not agree well with the experimentally measured miscroindentation load and hardness at small scales, implying that the indenter tip radius is not the main factor for the size effect. |
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| Keywords: | size effect indentation tests conventional plasticity theory curvature radius |
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