A theoretically determined model for friction in metal working processes

Wanheim, Tarras; Bay, Niels; Petersen, Alex

doi:10.1016/0043-1648(74)90165-3

Cited by 159 publications

(71 citation statements)

References 5 publications

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“…Another point to be noticed is that the increase in reduction gives a rise to the decrease of the final surface roughness, which is rather obviously reflected in the experimental data. The positive effect of friction coefficient on the flattening of surface asperities can also get convinced by Bay et al's work [28,29], where they argued that the real area of contact increased as the surface asperity flattening process was enhanced by the large friction factor. The exemplary simulation results with initial surface roughness of 10 μm are displayed in Table 5, together with the experimental data appearing in Ref.…”

Section: Numiform 2016mentioning

confidence: 62%

Finite element method analysis of surface roughness transfer in micro flexible rolling

Xie

Jiang

2016

MATEC Web Conf.

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Abstract. Micro flexible rolling aims to fabricate submillimeter thick strips with varying thickness profile, where the surface quality of products is mainly determined by initial workpiece surface roughness and subsequent surface asperity flattening process, which is affected by process parameters during rolling. This paper shows a 3D finite element model for flexible rolling of a 250 μm thick workpiece with reduction of 20 to 50%, and rolling phase with thinner thickness indicates a better ability to decrease the surface roughness. Four types of initial workpiece surface roughness are studied in the simulation, and the influences of process parameters, such as friction coefficient, rolling speed and roll gap adjusting speed, on surface asperity flattening of workpieces with different initial surface roughness have been numerically investigated and analysed.

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Section: Numiform 2016mentioning

confidence: 62%

Finite element method analysis of surface roughness transfer in micro flexible rolling

Xie

Jiang

2016

MATEC Web Conf.

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“…The amplitude, shape and spacing of the roughness all affect the slope of the asperities, which has a great ~ffect on the deformation friction as modeled by Green and by other researchers [52][53][54][55]. A steeper slope according to these models will lead to increased friction.…”

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confidence: 99%

The effect of surface morphology on the friction of electrogalvanized sheet steel in forming processes

Skarpelos

1993

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“…A more advanced friction models has been proposed by Wanheim et al who used the slip-line theory to determine a friction model which depends on the friction factor and the real contact of area [5]. Makinouchi and Ike performed FEM calculations in order to investigate the contact between tool and workpiece on a microscopic scale [6].…”

Section: Introductionmentioning

confidence: 99%

A Constitutive Friction Law for Sheet-Bulk Metal Forming

Beyer

Willner

2016

Tribology Online

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Friction has a significant effect on metal forming both in economic and technical terms. This is especially true for sheet-bulk metal forming, which is a combination of bulk metal forming and sheet metal forming. Contact loads of sheet forming processes are typically low to moderate. In contrast, very high contact loads occur in bulk metal forming. Therefore, a friction law, which is applicable for a broad range of contact loads, is necessary, if such a process has to be modelled accurately with the finite element method. A friction law fulfilling this demand is identified with the use of an elastic-plastic half-space model. The half-space model is used to determine the normal contact of rough surfaces and it is validated with experiments. In order to highlight the impact of the identified friction law, a typical sheet-bulk metal forming process is taken into account in the framework of the finite element method.

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A theoretically determined model for friction in metal working processes

Cited by 159 publications

References 5 publications

Finite element method analysis of surface roughness transfer in micro flexible rolling

Finite element method analysis of surface roughness transfer in micro flexible rolling

The effect of surface morphology on the friction of electrogalvanized sheet steel in forming processes

A Constitutive Friction Law for Sheet-Bulk Metal Forming

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