Influence of sliding direction and sliding speed on the micro-hydrodynamic lubrication component of aluminium mill-finish sheets

Roizard, Xavier; Raharijaona, F; Stebut, J. von; Belliard, P.

doi:10.1016/s0301-679x(00)00008-6

Cited by 15 publications

(10 citation statements)

References 3 publications

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“…In this case, we attribute the frictional anisotropy to lubricant channeling effects as described in detail by Roizard, et al (11). In the longitudinal orientation, lubricant can flow along the sheet grit lines and escape the metal-tool contact region thus leading to higher friction.…”

Section: Frictional Anisotropymentioning

confidence: 83%

Effect of Lubricant Quantity and Surface Topography on the Frictional Behaviour of Can Body Stock

Chvedov¹,

Jones²,

Rosenfeld³

2003

Tribology Transactions

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The friction of can body stock, alloy AA3104. with various surfice topogruphies and I~ibricont coating weigl~ts was studied by nzeans of cr cc~pstan rest. ~~l t i c l~ goes sonle way towards simulating the ~I r u~~~t i g proce~s. The coefficient offriction varies significantly os a function of I~ibricctnt loud. The friction decreases ~Crlz irzcretising Irrbriccrnt n~eight coid rlwr plateaus, remaining consrant in~lc~penrlenr of f~rrtlzer I~rbricant weight increases. A significant rlrffercnce in coefficient offriction for santples tested while oriented dong the rolling diwcrion vs. oriented in the trunsverse direction has been inrerpretctl in terms of a pict~r,r of severe asperity rlefonnatior~ crt low I~ibricr~nt loarls and was related to the surface ropogruphy of the sl~eet. A siniple nioclel of nzised I~ibrication provides (1 recrsonr~hle corrrloriori betwcet~ the real urea of nzerollrool contctcr obtuinedfionz the crrpstan tcst nzcas~rren~etzts and the cotztuct ureu derived inclepet~dently from slzeet ropograpl~y.

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Section: Frictional Anisotropymentioning

confidence: 83%

Effect of Lubricant Quantity and Surface Topography on the Frictional Behaviour of Can Body Stock

Chvedov¹,

Jones²,

Rosenfeld³

2003

Tribology Transactions

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“…This conclusion was also drawn by Kirkhorn et al [ 67 ]. Despite the above-mentioned difficulties in the interpretation of the COF, the strip drawing test is a primary method for determination of the COF in SMF [ 52 , 68 , 69 , 70 ]. The highest value of COF in terms of the loads considered was observed during lubrication with L-HL 46 hydraulic oil.…”

Section: Resultsmentioning

confidence: 99%

Modeling of Friction Phenomena of Ti-6Al-4V Sheets Based on Backward Elimination Regression and Multi-Layer Artificial Neural Networks

2021

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This paper presents the application of multi-layer artificial neural networks (ANNs) and backward elimination regression for the prediction of values of the coefficient of friction (COF) of Ti-6Al-4V titanium alloy sheets. The results of the strip drawing test were used as data for the training networks. The strip drawing test was carried out under conditions of variable load and variable friction. Selected types of synthetic oils and environmentally friendly bio-degradable lubricants were used in the tests. ANN models were conducted for different network architectures and training methods: the quasi-Newton, Levenberg-Marquardt and back propagation. The values of root mean square (RMS) error and determination coefficient were adopted as evaluation criteria for ANNs. The minimum value of the RMS error for the training set (RMS = 0.0982) and the validation set (RMS = 0.1493) with the highest value of correlation coefficient (R2 = 0.91) was observed for a multi-layer network with eight neurons in the hidden layer trained using the quasi-Newton algorithm. As a result of the non-linear relationship between clamping and friction force, the value of the COF decreased with increasing load. The regression model F-value of 22.13 implies that the model with R2 = 0.6975 is significant. There is only a 0.01% chance that an F-value this large could occur due to noise.

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“…W procesie tłoczenia próbę ciągnienia paska blachy przypisuje się do modelowania zjawiska tarcia między stemplem i ścianką wytłoczki. Próba ta polega na przeciąganiu paska blachy umieszczonego między nieobrotowymi przeciwpróbkami, najczęściej o kształcie walcowym [5]…”

Section: Test Przeciągania Paska Blachyunclassified

Methods of determination of frictional resistances in sheet metal forming of car body sheets

Trzepieciński

Nowotyńska

2018

atest

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The friction phenomenon existed in almost all plastic working processes, in particular sheet metal forming, is a complex function of the material's properties, parameters of the forming process, surface topography of the sheet and tools, and lubrication conditions. During the stamping of the drawpieces there are zones differentiated in terms of stress and strain state, displacement speed and friction conditions. This article describes the methods for determining the value of the coefficient of friction in selected areas of sheet metal and presents the drawbacks and limitations of these methods.

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Influence of sliding direction and sliding speed on the micro-hydrodynamic lubrication component of aluminium mill-finish sheets

Cited by 15 publications

References 3 publications

Effect of Lubricant Quantity and Surface Topography on the Frictional Behaviour of Can Body Stock

Effect of Lubricant Quantity and Surface Topography on the Frictional Behaviour of Can Body Stock

Modeling of Friction Phenomena of Ti-6Al-4V Sheets Based on Backward Elimination Regression and Multi-Layer Artificial Neural Networks

Methods of determination of frictional resistances in sheet metal forming of car body sheets

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