Development of a Constitutive Friction Law based on the Frictional Interaction of Rough Surfaces
Journal Title: Tribology in Industry - Year 2015, Vol 37, Issue 4
Abstract
Friction has a considerable impact in metal forming. This is in particular true for sheet-bulk metal-forming (SBMF) in which local highly varying contact loads occur. A constitutive friction law suited to the needs of SBMF is necessary, if numerical investigations in SBMF are performed. The identification of the friction due to adhesion and ploughing is carried out with an elasto-plastic half-space model. The normal contact is verified for a broad range of normal loads. In addition, the model is used for the characterization of the occurring shear stress. Ploughing is determined by the work which is necessary to plastically deform the surface asperities of the new area that gets into contact during sliding. Furthermore, the surface patches of common half-space models are aligned orthogonally to the direction in which the surfaces approach when normal contact occurs. For a better reflection of the original surfaces, the element patches become inclined. This leads to a geometric share of lateral forces which also contribute to friction. Based on these effects, a friction law is derived which is able to predict the contact conditions especially for SBMF.
Authors and Affiliations
F. Beyer , F. Hauer , K. Willner
Keywords
Related Articles
- EP ID EP143554
- DOI -
- Views 74
- Downloads 0
Influence of Combined Hard and Fine Machining on the Surface Properties of Cemented Carbides
As a result of recent developments in cold forging cemented carbides are increasingly used as tool materials. Due to their high hardness only electrical discharge machining (EDM) and grinding are suitable for tool machi...
Study of Mechanical and Sliding Wear Behavior of Al-25Zn alloy/SiC/Graphite Novel Hybrid Composites for Plain Bearing Application
In this investigations, sliding wear performance of Al-25Zn based novel hybrid composites added with fixed weight percentage of graphite (3 wt.%) and varying weight percentage of silicon carbide (10, 20 and 30 wt.%) was...
The Effect of Compression Ring Profile on the Friction Force in an Internal Combustion Engine
In an internal combustion engine piston, piston ring and cylinder are the most important assembly for transmitting the forces produced by the combustion process. The friction between piston ring pack and cylinder account...
Comparison of PID and Fuzzy PID Controller for a Linearised Magnetic Bearing
This paper is a presentation of a linear model of a magnetic bearing and a comparison of two controllers concerning their control performance. Initially, the benefits obtained by the use of magnetic bearings in the elect...
Experimental Investigations on Tribological Behaviour of Alumina Added Acrylonitrile Butadiene Styrene (ABS) Composites
Composite materials are multifunctional in nature, which can be custom-made based on the nature of the applications. The challenge of composite materials lie on complementing the properties of one another i.e. materials...