File:Martens curves.JPG
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Summary
[edit]DescriptionMartens curves.JPG | Typical “Stribeck” curves obtained by Martens showing coefficient of friction as a function of pressure in kgf/cm² (even if it looks like kg/mm²) at v = 0.5 m/s using water quenched, hardened steel shaft 99.6 mm diameter and 70.2 mm long, running in bearing shell made from “Rotguß” (red brass, a Cu-Sn-Zn cast alloy) with “Rüböl” (rape oil). The parameter lines represent temperature in °C. |
Date | |
Source |
Adolf Martens Schmieröluntersuchungen (Investigations on lubrication oils) Part I: Mitteilungen aus den Königlichen technischen Versuchsanstalten zu Berlin, Ergänzungsheft III 1888, p. 1-37, Verlag von Julius Springer, Berlin and Part II: Mitteilungen aus den Königlichen technischen Versuchsanstalten zu Berlin, Ergänzungsheft V, 1889, p. 1-57, Verlag von Julius Springer, Berlin (Note: These files can be downloaded from the archived 2015 website of BAM: https://web.archive.org/web/20151011094512/http://www.bam.de/de/ueber_uns/geschichte/adolf_martens.htm) |
Author | Adolf Martens |
Permission (Reusing this file) |
The author died 1914. 71 years after the death of the author are figures free. |
Licensing
[edit]Public domainPublic domainfalsefalse |
This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer. You must also include a United States public domain tag to indicate why this work is in the public domain in the United States. Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Jamaica has 95 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Honduras has a general copyright term of 75 years, but it does implement the rule of the shorter term. Copyright may extend on works created by French who died for France in World War II (more information), Russians who served in the Eastern Front of World War II (known as the Great Patriotic War in Russia) and posthumously rehabilitated victims of Soviet repressions (more information). | |
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
Original upload log
[edit]Date/Time | Dimensions | User | Comment |
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2009-07-14 10:48:01 | 378 × 377 | Mwoydt | {.{Information |Description = Typical “Stribeck” curves obtained by Martens showing coefficient of friction as a function of “pressure” (water quenched, hardened steel shaft 99.6 mm diameter, running in bearing shell made from “Rotguß” (r |
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current | 12:53, 2 October 2019 | 671 × 670 (98 KB) | Theosch (talk | contribs) | higher resolution | |
10:09, 4 March 2017 | 378 × 377 (30 KB) | FastilyClone (talk | contribs) | Transferred from en.wikipedia (MTC!) |
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