Download Advances in Composite Tribology by Klaus Friedrich (Eds.) PDF

By Klaus Friedrich (Eds.)

A lot study has been performed, and many development has been made in the direction of using composite fabrics in a variety of tribological functions. in recent times, reports were made to figure out to what measure phenomena governing the tribological functionality of composites could be generalized, and to consolidate interdisciplinary details for polymer-, steel- and ceramic matrix composites. the significance of marketing higher wisdom within the parts of friction, lubrication and put on, normally, is validated by means of the contents of the quantity. It covers a variety of matters extending from primary study at the tribological features of varied multi-phase fabrics as much as ultimate purposes of composites in put on loaded, technical elements. as well as the emphasis on composites tribology, the sensible point of the sphere is additionally reviewed via authors who're engaged in utilized study in addition to these in additional educational actions. The articles during this quantity will be of worth to either researchers and mechanical designers of their paintings in the direction of a collection of predictive, fabrics engineering-related versions for a extra trustworthy use of composites as tribo-materials. in the course of the research and statement of the tribology of sensibly formulated composite platforms, a transparent and extra profound realizing of the topic of tribology may perhaps emerge. during this feel, this article deals a serious overview of the kingdom of knowing of the foundations of tribology and its skill to serve the sensible and advertisement wishes of this expertise usually, and especially within the context of composite platforms

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5. Pin-on-disk apparatus. of the counterpart can be varied by changing the disk. The sample was a pin of polymer, which was mounted on a sample holder as shown in fig. 5 and pressed against the rotating disk. The relative sliding velocity between the pin and disk was smoothly variable over a wide range by adjusting the rotation speed of the disk. The friction force was calculated from the torque as measured by the strain gauge mounted in the vertical arm. The wear-induced position of the pin holder was measured by a displacement pick-up.

Z v /. Song, G. W. Ehrenstein 48 T A B L E 12 Influence of normal load on the tribological properties. 29 ± 0 . 24 64 = 23°C. 48 18 - m m / N m ] , / : friction coefficient. 3 The same tendency for the influence of the normal load is observed with PA 66 as well (table 12). 2. Sliding velocity. Two effects of the sliding velocity on the tribological properties were investigated: - The influence of the sliding velocity on the stick-slip effect. According to ref. [37] a strongly marked falling friction coefficient with increasing sliding velocity leads to the stick-slip effect.

100 , , , 150 temperature [°C] , , . , 200 (b) Fig. 15. D S C curves of a self-reinforced (a) and a normal (b) PP specimen. 2. Results of the measurement of retardation on PE-HD The average retardation of a self-reinforced and a normal PE-HD specimen is compared in fig. 17. PE-HD is self-reinforced by oriented crystalline structures (shish-kebab struc­ tures) and it is highly crystalline. Therefore, the orientation of the crystalline structures can approximately be found by means of measurement of retardation, 5A J/g 0 130° C a 310°C V^TypI 132,1°C^- ^ -- temperature [°C] Fig.

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