郭俊宏,马德军,陈伟,宋仲康.摩擦系数对仪器化压入测试结果影响的有限元分析[J].表面技术,2012,(4):113-117.
GUO Jun-hong,MA De-jun,CHEN Wei,SONG Zhong-kang.Finite Element Analysis for Effect of Friction Coefficient on Instrumented Indentation Test.Surface Technology,2012,(4):113-117.
摩擦系数对仪器化压入测试结果影响的有限元分析
Finite Element Analysis for Effect of Friction Coefficient on Instrumented Indentation Test
投稿时间:2012-04-13  修订日期:2012-08-20
DOI:
中文关键词:  仪器化压入  弹性模量  金刚石压头  摩系数
英文关键词:instrumented indentation  elastic modulus  diamond indenter  friction coefficient
基金项目:国家自然科学基金项目(10672185)
作者单位
郭俊宏 装甲兵工程学院机械工程系,北京100072 
马德军 装甲兵工程学院机械工程系,北京100072 
陈伟 装甲兵工程学院机械工程系,北京100072 
宋仲康 装甲兵工程学院机械工程系,北京100072 
AuthorInstitution
GUO Jun-hong Department of Mechanical Engineering, Academy of Armored Force Engineering, Beijing 100072, China 
MA De-jun Department of Mechanical Engineering, Academy of Armored Force Engineering, Beijing 100072, China 
CHEN Wei Department of Mechanical Engineering, Academy of Armored Force Engineering, Beijing 100072, China 
SONG Zhong-kang Department of Mechanical Engineering, Academy of Armored Force Engineering, Beijing 100072, China 
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中文摘要:
      针对材料弹性模量仪器化压入识别的两种代表性方法———Ma方法和Oliver-Pharr方法,应用有限元数值模拟,分析了金刚石压头与具有典型加工硬化特性的金属类被测材料之间接触面摩擦系数对弹性模量识别精度的影响,分析结果表明:摩擦系数介于0~0.2范围时,采用两种方法,弹性模量识别精度对摩擦系数的变化较敏感;摩擦系数大于0.2之后,两种方法对摩擦系数变化的敏感性降低,弹性模量的识别精度趋于稳定。对两种方法的测试精度进行比较可以看出,Ma方法测试结果的精度和相对于摩擦系数变化的稳定性均好于Oliver-Pharr方法,仪器化压入实验应使用Ma方法识别材料的弹性模量。两种铝合金材料的实验数据表明,将摩擦系数对测试结果的影响进行修正,可有效提高Oliver-Pharr方法弹性模量的识别精度。
英文摘要:
      Frictional effects on instrumented indentation of strain hardening solids were examined. Finite-element simulations were carried out to study the effects of friction coefficient on the two representative indentation test methods: Ma method and Oliver-Pharr method. It is found that for different friction coefficient from 0 to 0.2, the test accuracy of elastic modulus derived by Ma method or Oliver-Pharr method is evidently sensitive to the values of friction coefficient; While the friction coefficient is > 0.2, the sensitivity of test accuracy tends to be stable. Comparing the test accuracy of the two methods, Ma method are better than Oliver-Pharr method in terms of test accuracy and stability. Ma method is recommended for instrumented indentation test. The experimental data of two aluminum alloys shows that, considering frictional effects, the amendment for Oliver-Pharr method is an effective method to improving its test accuracy.
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