Effect of roughness scale on contact stiffness between solids

Zahouani, H.; Mezghani, S.; Pailler-Mattéi, C.; Elmansori, Mohamed

doi:10.1016/j.wear.2008.04.067

Cited by 16 publications

(11 citation statements)

References 7 publications

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“…The effect of the contact interface evolution (profile evolution and third body flows) on the contact stiffness was highlighted for both the sticking and the sliding conditions for the two values of the initial roughness. The presented results were in good agreement with the results recovered by the analytical/numerical models presented in [43,[46][47][48].…”

Section: Discussionsupporting

confidence: 88%

“…The estimated stiffness ranged between 2.7 × 10 11 (Pa/m) and 6.1 × 10 11 (Pa/m), when increasing the contact pressure between 0.1 MPa and 1 MPa. The increase in contact stiffness as a function of the contact pressure was in agreement with the theoretical and numerical results presented in [46], in which contact stiffness was studied by using an elastic contact model between a smooth plane and a rough surface.…”

Section: Contact Stiffness Identificationsupporting

confidence: 89%

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Estimation of the Normal Contact Stiffness for Frictional Interface in Sticking and Sliding Conditions

et al. 2019

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Modeling of frictional contact systems with high accuracy needs the knowledge of several contact parameters, which are mainly related to the local phenomena at the contact interfaces and affect the complex dynamics of mechanical systems in a prominent way. This work presents a newer approach for identifying reliable values of the normal contact stiffness between surfaces in contact, in both sliding and sticking conditions. The combination of experimental tests, on a dedicated set-up, with finite element modeling, allowed for an indirect determination of the normal contact stiffness. The stiffness was found to increase with increasing contact pressure and decreasing roughness, while the evolution of surface topography and third-body rheology affected the contact stiffness when sliding.

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Section: Discussionsupporting

confidence: 88%

Section: Contact Stiffness Identificationsupporting

confidence: 89%

Estimation of the Normal Contact Stiffness for Frictional Interface in Sticking and Sliding Conditions

et al. 2019

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“…However, compared to the other two models, the IBS appears to be less impacted by the global events. Nonetheless, the results for the short and long-run relationships between the ASE, CBS and IBS models' variable are generally in line with the conclusions of other studies [12][13][14].…”

Section: The Results and Findingssupporting

confidence: 90%

Analysing the Short-run and Long-run Relationships between Macroeconomic Variables and Financial Development in Jordan From 1978-2013

Mohammad¹

2017

J Glob Econ

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The main objective of this study was to examine the short and long-run relationships between macroeconomic variables such as : gross domestic product, foreign direct investment, money supply, consumer price index, interest payment on external debt and fuel import and Jordan's financial development represented by Amman Stock Exchange (ASE), Conventional Banking System (CBS) and Islamic Banking System (IBS). Moreover; to examine the directional causality between Jordanian economy and financial development. The annual time series data for the period from 1978 to 2013 is used to obtain these objectives. The Granger Causality Test revealed a unidirectional causality relationship between economic growth and Jordan's financial development. Also, the economic growth appear to lead the ASE while, CBS and IBS appear to lead the economic growth. These results are in support of the theories and the hypotheses of this study which postulates that the financial development were positively affected by GDP, FDI, MS2 and F1 and negatively affected by CPI and IP is the short and long-run analysis. Further, the macroeconomic variables appeared to strongly predict Jordanian financial development performance. Jordan's government and policy-makers should encourage the investors to establish more Islamic banks, launch awareness campaigns and financial market's programs, and continue governing the monetary policy in the right direction to combat inflation. Future studies may focus on the influence of other variables such as: the privatisation programs, total debt, public and private domestic savings and economic openness on Jordan's financial development.

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“…To correlate the cutting signature of NFRP with the cutting contact scale, we introduce a multiscale decomposition method of the surface topography based on wavelets transform [41][42][43]. This approach determine the multiscale transfer function of the morphological modification in surface topography after profile milling process denoted by Multiscale Process Signature (MPS) [29].…”

Section: Multiscale Surface Analysismentioning

confidence: 99%

Fiber type effect on tribological behavior when cutting natural fiber reinforced plastics

Chegdani

Mezghani

Mansori

et al. 2015

Wear

Self Cite

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. AbstractRecently, natural fiber reinforced plastic (NFRP) materials are becoming a viable alternative to synthetic fiber in many industrial applications which not require high structural performances. However, machining of NFRP such as milling process is almost unavoidable operation to facilitate the parts assembly in addition to the finishing of final products. The present study thus focused on the influence of natural fiber types on tribological behavior during profile milling process. Three types of short natural fibers (bamboo, sisal and miscanthus) reinforced polypropylene (PP) composites are investigated. The quality of NFRP machined surface is quantified using a multi-scale analysis based on wavelets decomposition. The natural fiber effect related to the machined surface quality is hence identified at all scales from roughness to waviness. The Bamboo fibers reinforced plastics which exhibit high contact stiffness shows the smoother surface finish after machining. Therefore, the multiscale surface roughness is used as descriptor of natural fiber's influence on the machining mechanisms and to establish the cutting signature of NFRP materials.

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Effect of roughness scale on contact stiffness between solids

Cited by 16 publications

References 7 publications

Estimation of the Normal Contact Stiffness for Frictional Interface in Sticking and Sliding Conditions

Estimation of the Normal Contact Stiffness for Frictional Interface in Sticking and Sliding Conditions

Analysing the Short-run and Long-run Relationships between Macroeconomic Variables and Financial Development in Jordan From 1978-2013

Fiber type effect on tribological behavior when cutting natural fiber reinforced plastics

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