Surface contact stress-based nonlinear virtual material method for dynamic analysis of bolted joint of machine tool

Zhao, Yaohua; Yang, Cheng; Cai, Ligang; Shi, Weimin; Liu, Zhifeng

doi:10.1016/j.precisioneng.2015.08.002

Cited by 55 publications

(33 citation statements)

References 30 publications

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“…Effect of D and G on A l . Similar to the above analysis of the A c , according to equations (10)- (13), the effect of D and G on A l can be obtained by numerical approximation method. In this section, the Newton iteration and the Chebyshev interval method are combined to obtain the interval of A l .…”

Section: Effects Of D and G On A C And A Lmentioning

confidence: 99%

“…You and Chen 12 presented that the simulation of the joint surface with the detailed division is closer to the practical surface. Zhao et al 13 presented a nonlinear virtual material method based on surface contact stress to describe the bolted joint for accurate dynamic performance analysis of the bolted assembly. R Grzejda 14 put forward a thesis that modeling dissymmetric nonlinear multi-bolted connections as a system is possible.…”

Section: Introductionmentioning

confidence: 99%

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Interval estimation for contact stiffness of bolted joint with uncertain parameters

Zhao

Yang

Liu

et al. 2019

Advances in Mechanical Engineering

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Bolted joints are elements used to create resistant assemblies in the mechanical system, whose overall performance is greatly affected by joints’ contact stiffness. Most of the researches on contact stiffness are based on certainty theory whereas in real applications the uncertainty characterizes the parameters such as fractal dimension D and fractal roughness parameter G. This article presents an interval estimation theory to obtain the stiffness of bolted joints affected by uncertain parameters. Topography of the contact surface is fractal featured and determined by fractal parameters. Joint stiffness model is built based on the fractal geometry theory and contact mechanics. Topography of the contact surface of bolted joints is measured to obtain the interval of uncertain fractal parameters. Equations with interval parameters are solved to acquire the interval of contact stiffness using the Chebyshev interval method. The relationship between the interval of contact stiffness and the uncertain parameters, that is, fractal dimension D, fractal roughness parameter G, and normal pressure, can be obtained. The presented model can be used to estimate the interval of stiffness for bolted joints in the mechanical systems. The results can provide theoretical reference for the reliability design of bolted joints.

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Section: Effects Of D and G On A C And A Lmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interval estimation for contact stiffness of bolted joint with uncertain parameters

Zhao

Yang

Liu

et al. 2019

Advances in Mechanical Engineering

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“…As Ref. [17], the fractal dimension and fractal roughness parameter of nodular cast iron (Material type is QT600-3 in China) with roughness . Corresponding to the value of D , the domain extension factor can be found in Ref.…”

Section: Numerical Simulationmentioning

confidence: 99%

Normal Contact Damping Predict Model of Joint Surface Based On Unit Area and Fractal Theory with Simulation

Zhao¹,

Hong²

2015

Proceedings of the 2015 3rd International Conference on Machinery, Materials and Information Technology Applications

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Joint surfaces widely exist in mechanical assembly structures, the local stiffness and damping have important effect on the whole dynamic analysis of the structure. In this study, proposed a normal contact damping forecast model and analyze its damping characteristics, based on the microcosmic mechanism between joint surfaces and citing the domain extension factor and unit area radio, combine with the modified fractal theory and energy dissipation. The simulation results show that the damping characteristic curve appear inflection point when the fractal dimension value D is 1.428. When, the normal contact damping increases with the increase of fractal dimension but decreases with the increase of contact area. When, the normal contact damping increase with the increase of contact area .Since the reaction of real contact area is relate to the change of the load, the relationship between the normal contact damping and the contact area can accurately predict the performance of assembly structure to a certain extent, the existence of the inflection point also provide a reference for the optimization design of assembly structure.

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“…Another feature of multi-bolted connections is that they are constructed of many structural components [7,22,27,28]. Due to irregular geometrical structures on the contact surfaces of the joined elements, these connections are usually treated as non-linear [33]. The subject of this paper is modelling of multi-bolted connections regarded as a non-linear system for the assembly condition.…”

Section: Introductionmentioning

confidence: 99%

Determination of Bolt Forces and Normal Contact Pressure Between Elements in the System with Many Bolts for its Assembly Conditions

Grzejda¹

2019

Adv. Sci. Technol. Res. J.

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The paper put forward a thesis that modelling dissymmetric non-linear multi-bolted connections as a system is possible. Modelling of the systems composed of four subsystems on the assembly state was presented. These subsystems included: a couple of joined elements (a flange and a support), a contact layer between them, and bolts. The physical model of the system was described considering the tightening of bolts according to a specific sequence. In this model: the flange and the support were built using spatial finite elements, the contact layer was formed as the non-linear Winkler model, and the bolts were replaced with simplified models made of flexible beams. The calculation model which can be applied to determine the changes in bolt forces, as well as in the normal contact pressure between the joined elements during the tightening of the system and at its end, was presented. The results of sample calculations for the selected multi-bolted system were shown.

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Surface contact stress-based nonlinear virtual material method for dynamic analysis of bolted joint of machine tool

Cited by 55 publications

References 30 publications

Interval estimation for contact stiffness of bolted joint with uncertain parameters

Interval estimation for contact stiffness of bolted joint with uncertain parameters

Normal Contact Damping Predict Model of Joint Surface Based On Unit Area and Fractal Theory with Simulation

Determination of Bolt Forces and Normal Contact Pressure Between Elements in the System with Many Bolts for its Assembly Conditions

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