An acoustic model for stiffness measurement of tribological interface using ultrasound

Du, Fei; Hong, Jun; Xu, Ying

doi:10.1016/j.triboint.2013.11.015

Cited by 29 publications

(20 citation statements)

References 29 publications

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“…Du et al [35] shows that the contact stiffness calculated by this spring-damper model agrees well with the predictions of theoretical contact models. Since the acoustic impedances of tool holder and spindle nose are almost the same, the spring-damper model was used for contact stiffness measurement, and the spring model was also used to compare with the spring-damper model.…”

Section: Normal Contact Stiffness Measurementsupporting

confidence: 66%

“…If the wavelength of the ultrasonic wave is much larger than the sizes of the air gaps, the incident wave will falls over many gaps, and the reflected wave is not dependent on the exact shape and size of each air gap but mainly on the interface stiffness [34]. In the past few decades, several acoustic models have been developed to describe the relationship between ultrasonic reflection coefficient and interface stiffness [35]. On this basis, an ultrasound transducer could be used to scan an interface to estimate the contact characteristics of the whole interface.…”

Section: Theoretical Foundation Of Ultrasonic Measurementmentioning

confidence: 99%

“…However, Biwa et al [37] and Krolikowski et al [39] pointed out that there is ultrasound attenuation at interface, and the cause might be the friction or adhesion of contacting asperities. Thus, Du et al [35] considered contact interface to be a thin layer of Maxwell material to take into account the effect of ultrasound attenuation. On this basis, they proposed a spring-damper model, as shown in Fig.…”

Section: Normal Contact Stiffness Measurementmentioning

confidence: 99%

“…However, the ultrasonic method does not suffer from the above disadvantages. Ultrasound is partly reflected from a contact interface, and the ratio of reflected wave amplitude to incident wave amplitude (namely reflection coefficient) can be used for the contact condition estimation like contact area, contact pressure and contact stiffness [20,[25][26][27][28][29][30][31][32][33][34][35][36]. Ultrasonic technique is a non-invasive method and has been used to investigate many practical contact situations, such as wheel-rail interaction, bolted joints and interference fits [20,[26][27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Ultrasonic measurement of contact stiffness and pressure distribution on spindle–holder taper interfaces

Zhang

et al. 2015

International Journal of Machine Tools and Manufacture

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Section: Normal Contact Stiffness Measurementsupporting

confidence: 66%

Section: Theoretical Foundation Of Ultrasonic Measurementmentioning

confidence: 99%

Section: Normal Contact Stiffness Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ultrasonic measurement of contact stiffness and pressure distribution on spindle–holder taper interfaces

Zhang

et al. 2015

International Journal of Machine Tools and Manufacture

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“…Figure 12 shows the relationship between the nominal contact pressure P and the dimensionless sum of the radii of contact asperities a c * . The dimensionless form of a c * can be defined as [27] where a i is the radii of the i-th contact asperity, and A a is the apparent contact area. Figure 13 shows the relationship between the nominal contact pressure P and the dimensionless contact area A * .…”

Section: Discussionmentioning

confidence: 99%

An Integrated Mechanical–Electrical Predictive Model of Electrical Contact Resistance between Two Rough Surfaces

Hong

Shao

et al. 2015

Tribology Transactions

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This article introduces a novel approach for predicting the electrical contact resistance (ECR) between two rough surfaces based on a combination of contact modeling with surface topography analysis. Firstly, asperities distributed on rough surfaces are simulated as parabolas. An asperity shouldershoulder contact model is developed, which is similar to the well-known Kogut-Etsion (KE) model but requires extended capability regarding different degrees of contact misalignment. On the basis of such a contact model, Holm's principle is then incorporated to create a new theoretical formulation revealing the constitutive relations between the ECR and the deformation patterns of microcontacts arising at the contact interface. Then, a watershed approach is employed to get the contact surface topographies with which an iterative computational strategy is then proposed to alleviate the programming and computing efforts for implementing the calculation of the total ECR at the contact interface. To verify the feasibility of the proposed method, aiming at one case, the KE-based model is reviewed and compared numerically to the new model. The comparison shows good agreement between the two models. A slight difference is that the suggested model gives a relative lower estimation on the ECR value, which is mainly attributed to the different judgment of the deformation mechanism.

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A bolt preload monitoring method based on the refocusing capability of virtual time reversal

Zhang

2019

Struct Control Health Monit

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Bolted joints are widely used in aerospace and civil structures. Nevertheless, bolts may easily lose preload because of inappropriate initial preloads or time-varying servicing loads. Hence, bolt loosening monitoring is important for ensuring the safety and reliability of the bolt-jointed structures. In this paper, a guided wave method based on virtual time reversal (VTR) and tightness index representing refocusing capability is developed for bolt preload monitoring and to mitigate the requirement of baseline. In VTR, a response signal acquired from the bolted structure in fully tightened condition is reversed and used as the excitation signal for the bolted structure in loosening states. On this basis, the ratio of the energy of the refocused wave packet in final received wave signal to the energy of the entire signal is defined as tightness index (TI E ). In this way, the calculation of TI E does not need to compare with baseline acquired in fully tightened condition. The effects of roughness of contact surfaces on guided wave propagation and the refocusing capability are analyzed by a 2D FE model. The proposed method is also experimentally validated by bolt-jointed structures with single and multiple bolts. The experimental results show that TI E increased almost linearly with the decease of bolt preload and is effective at the early stage of bolt loosening. In addition, the effect of temperature on preload detection accuracy is weak. Furthermore, it is important to select a right frequency to ensure that the TI E is sensitive throughout the entire bolt torque range.

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An acoustic model for stiffness measurement of tribological interface using ultrasound

Cited by 29 publications

References 29 publications

Ultrasonic measurement of contact stiffness and pressure distribution on spindle–holder taper interfaces

Ultrasonic measurement of contact stiffness and pressure distribution on spindle–holder taper interfaces

An Integrated Mechanical–Electrical Predictive Model of Electrical Contact Resistance between Two Rough Surfaces

A bolt preload monitoring method based on the refocusing capability of virtual time reversal

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