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Experimental measurement of gear mesh stiffness of cracked spur gear by strain gauge technique
Affiliation:1. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, People''s Republic of China;2. State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400030, People''s Republic of China;3. Department of Mechanical and Materials Engineering, University of Cincinnati, Cincinnati, OH 45221-0072, USA;1. Carraro S.p.A., Via Olmo 37, 35010, Campodarsego, PD (Italy);2. University of Padova, Department of Industrial Engineering, Via Venezia 1, 35121, Padova (Italy);1. School of Mechanical Engineering and Automation, Northeastern University, Shenyang, Liaoning 110819, PR China;2. State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi''an 710049, PR China;1. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, People''s Republic of China;2. Department of Mechanical and Materials Engineering, University of Cincinnati, Cincinnati, OH 45221-0072, USA;1. Beijing Engineering Research Center of Precision Measurement Technology and Instruments (Beijing University of Technology), Chao Yang District, Beijing 100124, China;2. Key Laboratory of Advanced Manufacturing Technology, Beijing University of Technology, Chao Yang District, Beijing 100124, China;3. Engineering College, Jiangxi Agricultural University, Nanchang 330045, China
Abstract:In this paper, an experimental technique based on strain gauge has been proposed to measure the gear mesh stiffness of healthy spur gear as well as of cracked spur gear pair system. Calculation of mesh stiffness of healthy and cracked spur gear tooth are based on strain energy and strain energy release rate respectively. The location of strain gauge plays an important role in calculation of strain energy stored in gear tooth. The locations of strain gauge on gear tooth are illustrated for healthy and cracked gear. Stress intensity factor (SIF) has been calculated by strain gauge technique for calculating the stiffness of cracked pinion tooth. The effect of crack length on mesh stiffness has been investigated by strain gauge technique and results are compared with the established analytical method.
Keywords:Mesh stiffness  Spur gear  Crack  SIF  Strain gauge
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