the gear-shaft interference fit is prone to plastic hole expansion under long-term meshing impact and residual stress relaxation
leading to a reduction in interference magnitude and potential safety hazards. Therefore
it is crucial to reveal the plastic hole expansion mechanism of gear interference fits.
Methods
2
Aiming at the plastic hole expansion phenomenon of gears
based on the established shaft-hole interference fit model
the allowable interference magnitude for shaft-hole interference fit was calculated. A mathematical model describing the variation of plastic deformation with cyclic load was established
the influence law of shaft-hole force on interference magnitude under interference fit was analyzed
and the effect of residual stress on the stress distribution of gear inner hole was investigated. On this basis
test pieces were designed
and gear plastic hole expansion tests were carried out.
Results
2
The results show that the maximum force is borne on the interference fit surface
and the forces on the gear and shaft increase with the increase of interference magnitude. Residual stress causes significant changes in the radial and axial distribution of stress inside the gear. The principle-based tests conducted verify the accuracy of the theoretical prediction model for plastic hole expansion under shaft-hole interference fit.
LI Gang . Bending fatigue life simulation analysis of helical gear pair of high-speed EMU gearbox [D]. Taiyuan : Taiyuan University of Technology , 2017 : 1 - 10 .
LI Wan , LIU Haiyu , TAN Lizhi , et al . Research on thermo-mechanical coupling and residual stress on tooth surface of face gear grinding [J]. Packaging Journal , 2021 , 13 ( 6 ): 10 - 18 .
LIU Yang , LIU Baolong , TAN Riming , et al . Finite element analysis of heat treatment and grinding residual stress of helical bevel gear [J]. Machinery , 2023 , 61 ( 4 ): 38 - 44 .
CAO Zhigang , LIU Shijun , LI Yufeng , et al . Finite element simulation research on internal residual stress state of carburizing and quenching gear [J]. Internal Combustion Engine & Parts , 2022 ( 10 ): 17 - 19 .
WEN Xiumei . Numerical calculation of residual stress of carburizing-queching and grinding hard tooth surface [D]. Changsha : Hunan University , 2020 : 1 - 74 .
ZHANG S G , WANG W Z , ZHANG H B , et al . The effect of hardness distribution by carburizing on the elastic-plastic contact performance [J]. Tribology International , 2016 , 100 : 24 - 34 .
OOI G T C , ROY S , SUNDARARAJAN S . Investigating the effect of retained austenite and residual stress on rolling contact fatigue of carburized steel with XFEM and experimental approaches [J]. Materials Science and Engineering:A , 2018 , 732 : 311 - 319 .
ROY S , OOI G T C , SUNDARARAJAN S . Effect of retained austenite on micropitting behavior of carburized AISI 8620 steel under boundary lubrication [J]. Materialia , 2018 , 3 : 192 - 201 .
WALVEKAR A A , SADEGHI F . Rolling contact fatigue of case carburized steels [J]. International Journal of Fatigue , 2017 , 95 : 264 - 281 .
CHEN Difa . Bendig fatigue test and performance prediction of gear considering hardness and residual stress [D]. Chongqing : Chongqing University , 2022 : 1 - 60 .
WANG W , LIU H J , ZHU C C , et al . Effect of the residual stress on contact fatigue of a wind turbine carburized gear with multiaxial fatigue criteria [J]. International Journal of Mechanical Sciences , 2019 , 151 : 263 - 273 .
LI Xin . Study on the contact fatigue performance of RV reducer crankshaft considering residual stress and inclusions [D]. Changsha : Central South University , 2022 : 32 - 38 .
SHU Yiliang , LIU Zhiming , YANG Guangxue , et al . Research on influence of centrifugal load on interference fit of shaft components [J]. Journal of Central South University(Science and Technology) , 2023 , 54 ( 7 ): 2941 - 2951 .
DONG Jianming , ZHOU Junbo , WANG Yanhua , et al . Optimal design and finite element analysis on the interference fit of transmission gear and shaft [J]. Mechanical Engineer , 2022 ( 8 ): 64 - 66 .
QI Jiashuo . Investigation on subsequent anisotropic behavior of sheet metals based on mechanism of mesoscopic plastic deformation [D]. Jinan : Shandong University , 2021 : 1 - 35 .
MUGHRABI H . On the life-controlling microstructural fatigue mechanisms in ductile metals and alloys in the gigacycle regime [J]. Fatigue & Fracture of Engineering Materials & Structures , 1999 , 22 ( 7 ): 633 - 641 .
ZHANG Meili , CUI Shuai , FENG Yunwen , et al . An evaluation method for small sample test in radiation environment [J]. Aeronautical Computing Technique , 2013 , 43 ( 6 ): 54 - 58 .