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Thermo-structural analysis on evaluating effects of friction and transient heat transfer on performance of gears in high-precision assemblies

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Journal of Central South University 2017年第1期24卷 71-80页

作者： hossein golbakhshi Moslem Namjoo Department of Mechanical Engineering of Biosystems University of JiroftJiroft 78671-61167Iran

The high precision assemblies with considerable radial interference should be accompanied by heating and cooling ***,the mechanical properties of metals are greatly affected by thermal ***,for evaluating the stress distribution and distortion of teeth profiles in a gear/shaft assembly,a transient thermal analysis is necessary for finding the change in mechanical *** friction on the contact surface is another important parameter in interaction of the gear with the *** the gear stress and deformation fields for several modes of heat transfer and friction coefficients showed that the maximum radial or tangential stresses on contact surface of the joint may have more than 8%increase by increasing friction coefficient;while the intensity of heat transfer at cooling stage has lower effect on stress distribution.

关键词： friction coefficient transient heat transfer stress field distortion of teeth concurrent analyses

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维普期刊数据库

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An efficient design tool based on FEM for evaluating effects of components properties and operating conditions on interaction of tire with rigid road

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Journal of Central South University 2015年第1期22卷 189-195页

作者： Moslem Namjoo hossein golbakhshi Department of Agricultural Machinery Engineering Faculty of AgricultureUniversity of Jiroft

It is noted that any variation in operating conditions has a considerable effect on the tire/road interaction. Furthermore,choosing a range of proper values for carcass stiffness is very essential for both tire safety and effective driving action. In this work,an elaborated 3D model fully compliant with the geometrical size of radial tire 185/60 R15 is worked up, for evaluating the effects of components properties and working conditions on deformation and stress/strain fields created inside the tire. For the simulation, the tire structure is assumed to be composed of tread, carcass ply, and bead. The mechanical behavior of rubber as main component of tire is described by Mooney-Rivlin material model. The comparison of the obtained results and laboratory tests demonstrates the validity and high accuracy of analysis.

关键词： rubber simulation carcass ply stiffness Mooney-Rivlin model

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维普期刊数据库

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Numerical simulation of tire/soil interaction using a verified 3D finite element model

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Journal of Central South University 2014年第2期21卷 817-821页

作者： Namjoo Moslem golbakhshi hossein Department of Agricultural Machinery Engineering Faculty of AgricultureUniversity of Jiroft

The compaction and stress generation on terrain were always investigated based on empirical approaches or testing methods for tire/soil ***,the analysis should be performed for various tires and at different soil *** the increasing capacity of numerical computers and simulation software,finite element modeling of tire/terrain interaction seems a good approach for predicting the effect of change on the *** this work,an elaborated 3D model fully complianning with the geometry of radial tire 115/60R13 was established,using commercial code Solidwork *** hyper-elastic and incompressible rubber as tire main material was analyzed by Moony-Rivlin *** Drucker-Prager yield criterion was used to model the soil *** show that the model realistically predicts the laboratory tests outputs of the modeled tire on the soft soil.

关键词： tire/soil interaction finite element method(FEM) soil compaction stress distribution inflation pressure

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维普期刊数据库

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