| 材料性能和压入深度对球压痕堆积/沉陷的影响 |
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| 引用本文： | 金宏平,陈建国.材料性能和压入深度对球压痕堆积/沉陷的影响[J].湖北汽车工业学院学报,2013(1):42-47. |
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| 作者姓名： | 金宏平 陈建国 |
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| 作者单位： | 湖北汽车工业学院机械工程系 |
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| 基金项目： | 湖北省自然科学基金资助项目(2011CDB089) |
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| 摘 要： | 压痕硬度受材料堆积/沉陷影响明显,通过有限元仿真技术分析了材料性能和压入深度对堆积/沉陷的影响,结果表明,随着弹性模量与屈服强度比、压入深度增加或硬化指数减小,材料的沉陷量减小而堆积量增加;当弹性模量与屈服强度比相对较小时,堆积/沉陷受硬化指数的影响较明显。根据建立的等效应变与材料堆积/沉陷的拟合函数关系,可以判断压痕过程的堆积/沉陷状态,从而对计算得到的压痕硬度的准确性进行评判。
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| 关 键 词： | 弹性模量 屈服强度 硬化指数 压入深度 球形压痕 |
Influence of Material Properties and Indentation Depth on Pile-up/Sink-in of Spherical Indentation |
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| Jin Hongping,Chen Jianguo.Influence of Material Properties and Indentation Depth on Pile-up/Sink-in of Spherical Indentation[J].Journal of Hubei Automotive Industries Institute,2013(1):42-47. |
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| Authors: | Jin Hongping Chen Jianguo |
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| Institution: | (Dept.of Mechanical Engineering,Hubei University of Automotive Technology,Shiyan 442002,China) |
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| Abstract: | Taking into account of the significant impact of pile-up/sink-in on indentation hardness,the influence of material properties and indentation depth on pile-up/sink-in was analyzed using the finite element simulation technology.The results show that the amount of sink-in decreases or pileup increases with the increase of ratio of the elastic modulus and yield strength,indentation depth,or decrease of work hardening;the influence of work hardening on pile-up/sink-in is bigger when the ratio of the elastic modulus and yield strength is smaller.A fitting function relationship between the equivalent strain and pile-up/sink-in was established to determinate of the amount of pile-up/sinkin,so the accuracy of indentation hardness can be evaluated. |
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| Keywords: | elastic modulus yield strength work hardening indentation depth spherical indentation |
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