Tribology of polymers

Santner, E.; Czichos, Horst

doi:10.1016/0301-679x(89)90170-9

Cited by 120 publications

(57 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…They have become elements of real machines, and the need for tribological knowledge has risen from the many frictional applications now involving plastics. Some general knowledge of polymers and composites has been published summarising global experiences, e.g., wear mechanism and particle detachment, transfer films, and the effects of reinforcements and lubricants [6][7][8]. Large numbers of papers have addressed a given material family, e.g., polyamides, under different conditions, such as abrasive effects [9][10][11][12].…”

mentioning

confidence: 99%

An engineering approach to dry friction behaviour of numerous engineering plastics with respect to the mechanical properties

Kalácska¹

2013

Express Polym. Lett.

View full text Add to dashboard Cite

The effect of friction on the wear of engineering polymers is a complex and intricate consequence of the micro-and macroscopic interactions of surfaces moving against one another. Friction and the resulting wear are not material properties of plastics; therefore, they cannot be reduced to tabular data of material characteristics that can be found in relevant manuals. Determining friction and the resulting wear involves more complex examination because they are characteristics of a frictional contact system where the effects of the entire system are manifest. Precise knowledge of system conditions is essential to evaluate the friction and resulting wear [1]. These materials have system-dependent tribological behaviour; thus, trends can be defined at a given condition, and the materials can be compared. The system approach is well-known from the literature [2, 199 An engineering approach to dry friction behaviour of numerous engineering plastics with respect to the mechanical properties G. Kalácska Abstract. Twenty-one different commercial-grade engineering polymers, including virgin and composite types, were selected for testing, based on mechanical engineering practices. Three groups were formed according to typical applications: 1) Sliding machine element materials; 2) Mechanically load-carrying machine element materials that are often subjected to friction and wear effects; and 3) Additional two amorphous materials used as chemically resistant materials that have rare sliding load properties. The friction running-in state was tested using a dynamic pin-on-plate test rig. During steady-state friction tests, two pv regimes (0.8 and 2 MPa"ms -1 ) were analysed by a pin-on-disc test system. Based on the measured forces on ground structural steel, surface friction coefficients were calculated and analysed with respect to the mechanical effects of friction. The friction results were evaluated by the measured mechanical properties: yield stress, Shore D hardness, Young's modulus and elongation at the break. The three material groups exhibited different trends in friction with respect to changing mechanical properties. Linear (with varying positive and negative slopes), logarithmic and exponential relationships were observed, and occasionally there were no effects observed. At steady-state friction, the elongation at the break had less effect on the friction coefficients. The dynamic sliding model, which correlates better to real machine element applications, showed that increasing hardness and yield stress decreases friction. During steady-state friction, an increase in pv regime often changed the sign of the linear relationship between the material property and the friction, which agrees with the frictional theory of polymer/steel sliding pairs.

show abstract

mentioning

confidence: 99%

An engineering approach to dry friction behaviour of numerous engineering plastics with respect to the mechanical properties

Kalácska¹

2013

Express Polym. Lett.

View full text Add to dashboard Cite

show abstract

“…2 as follows: Figure 2, shows the variation of composite wear volume with the statically applied load It illustrates that the wear volume increases as applied load increase for four types of layers, the wear volume is in lower level in type (1) than type (4). Figure 3 shows the variation of wear volume with the varied of time and the wear volume increases for all conditions, but at second min.…”

Section: Resultsmentioning

confidence: 91%

“…Their use is always indicated where fluids are ineffective or cannot be tolerated because of the possibility of contamination of the product or the environment, or lack of opportunity for maintenance [4] . Today they include space and aeronautical technology, automobiles, agriculture machines, vacuum and cryogenic instruments … etc.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Time Variation on the Wear Sliding Behavior of Composites

Salih¹,

Salih²,

Salih³

2009

American J. of Applied Sciences

View full text Add to dashboard Cite

Abstract:Composites materials are widely used in all industries all over the world, replacing many other engineering materials. Reasons for such popularity are many, among such, are their physical and mechanical properties in addition to the simplicity of their manufacturing processes. Machine elements that are made of polymeric materials are usually exposed to different causes of failure such as wear. The time effect on the wear behaviour of some composite materials (polyester-commercially fiber reinforcement named (E-glass) was studied. In this study four type of composite different in number of layers, it had (3-6-9-12) layers (Wear volume 0.48, 0.41, 0.71 and 0.78 respectively). All experiments were conducted under dry condition. Preliminary results show the wear volume increases for all examined composites, as the statically applied load increases. Fourth type has the highest wear resistance, then third type and lastly first type. The wear volume increases for all examined composites, varied of time increases.

show abstract

“…They also showed that applied load has more effect on the wear than the speed for composites. Several authors [17][18][19][20][21][22] observed that the friction coefficient of polymers and its composites rubbing against metals decreases with the increase in load though some other researchers have different views. Stuart [23] and other researchers [24][25][26] showed that value of friction coefficient increases with the increase in load.…”

Section: Introductionmentioning

confidence: 99%