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| Study on Dynamic Force Calibration of Axial Fatigue Testing Machines |
| HU gang1,YANG Zong-ying2 |
1.National Institute of Metrology, Beijing 100013, China
2.Beijing Institute of Aeronautical Materials, Beijing 100095, China |
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Abstract Based on the vibration analysis of mechanical model of electro-hydraulic-servo and electro-magnetic-resonant fatigue testing machines,the expressions of dynamic force errors of the two types of fatigue testing machines are derived. The main factors effect on amplitude of the inertial force,such as working frequency,mass and stiffness of gripping devices or specimen and so on,are analyzed. Based on the theoretic research,a series of comparison experiments of dynamic force calibration were carried out to test and verify the results of theoretic analysis. The correction of dynamic force error of fatigue testing machine is discussed,and the advice on choice of calibration devices and gripping devices is given.
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［1］张贵仁.材料试验机［M］.北京:中国计量出版社,2010.
［2］张妮.高频疲劳试验机动态特性的研究［D］.杭州:浙江工业大学,2009.
［3］Sawla A. Measurement of dynamic forces and compensation of errors in fatigue testing［C］//Proceedings of the 12th triennial world congress of the international measure-mentation confederation(IMEKO),Beijing,1991,403-408.
［4］Hessling J P. Dynamic calibration of uni-axial material testing machines ［J］.Mechanical systems and signal processing,2008,22:451-466.
［5］由广珍.现代疲劳试验机机械振动系统力学特性及分析方法的探讨(1) ［J］.试验机与材料试验,1981,（5）:27-32.
［6］由广珍.现代疲劳试验机机械振动系统力学特性及分析方法的探讨(2) ［J］.试验机与材料试验,1981,（6）:23-35.
［7］由广珍.现代疲劳试验机机械振动系统力学特性及分析方法的探讨(3) ［J］.试验机与材料试验,1982,（1）:23-29.
［8］ISO 4965:1979,Axial load fatigue testing machines-Dynamic force calibration-Strain gauge technique［S］.
［9］ASTM E467-2008,Standard Practice for Verification of Constant Amplitude Dynamic Force in an Axial Fatigue Testing System ［S］.
［10］BS 7935,Constant amplitude dynamic force calibration ［S］.
［11］JJG 556-2011,轴向加荷疲劳试验机检定规程［S］.2011.
［12］JB/T 5488-1991,高频疲劳试验机［S］.1991.
［13］Rao S S.机械振动［M］.李欣业,张明路,译.北京:清华大学出版社,2009.
［14］瞿林楠.轴向疲劳试验机的校正［J］.试验机与材料试验,1983,（5）:54-58. |
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2012, Vol. 33 
