Heinrich Hertz: Difference between revisions

{{Use dmy dates|date=April 2021}}

{{Infobox scientist

| image = Heinrich Rudolf Hertz.jpg

| birth_date = {{birth date|df=y|1857|2|22}}

| death_date = {{death date and age|df=y|1894|1|1|1857|2|22}}

| death_place = [[Bonn]], [[German Empire]]

| signature = Autograph of Heinrich Hertz.png

}}

 

==Biography==

In 1892, Hertz was diagnosed with an infection (after a bout of severe [[migraines]]) and underwent operations to treat the illness. He died due to complications after surgery which had attempted to cure his condition, some consider his ailment to have been caused by a malignant bone condition.<ref>{{Cite web |last=Robertson, O'Connor |title=Heinrich Rudolf Hertz |url=https://mathshistory.st-andrews.ac.uk/Biographies/Hertz_Heinrich/ |access-date=20 October 2020 |website=MacTutor |publisher=University of Saint Andrews, Scotland}}</ref> He died at the age of 36 in [[Bonn]], Germany, in 1894, and was buried in the [[Ohlsdorf Cemetery]] in Hamburg.<ref name="Friedhof_Hamburg">[http://www.friedhof-hamburg.de/ohlsdorf/prominente/h/ Hamburger Friedhöfe » Ohlsdorf » Prominente]. Friedhof-hamburg.de. Retrieved 22 August 2014.</ref><ref name="Map_of_Cemetery_Ohlsdorf">[https://web.archive.org/web/20120131202611/http://www.friedhof-hamburg.de/fileadmin/Dateien/pdf/ohlsdorf/plan_ohlsdorf_A4.pdf Plan Ohlsdorfer Friedhof (Map of Ohlsdorf Cemetery)]. friedhof-hamburg.de.</ref><ref name="IEEE_Did_you_know">IEEE Institute, [http://theinstitute.ieee.org/technology-focus/technology-history/did-you-know-historical-facts-that-are-not-true Did You Know? Historical ‘Facts’ That Are Not True] {{webarchive|url=https://web.archive.org/web/20140110200549/http://theinstitute.ieee.org/technology-focus/technology-history/did-you-know-historical-facts-that-are-not-true |date=10 January 2014 }}</ref><!-- Note: [[Ohlsdorf Cemetery]] is not the same as [[Ohlsdorf Jewish Cemetery]]. Heinrich Hertz is buried at Q24, 53-58. The map shows that this is located in the middle of the Ohlsdorf Cemetery. The Ohlsdorf Jewish Cemetery is located about a kilometer southwest of the Ohlsdorf Cemetery. -->

 

 

==Scientific work==

===Contact mechanics===

{{Main|Contact mechanics}}

 

In 1881 and 1882, Hertz published two articles<ref>{{Cite journal |last=Hertz, Heinrich |year=1882 |title=Ueber die Berührung fester elastischer Körper |url=https://www.degruyter.com/document/doi/10.1515/crll.1882.92.156/html |journal=Journal für die reine und angewandte Mathematik |volume=1882 |issue=92 |pages=156–171 |doi=10.1515/crll.1882.92.156 |s2cid=123604617}}</ref><ref>{{Cite journal |last=Hertz |first=Heinrich |date=1882 |title=Über die Berührung fester elastischer Körper und über die Härte |url=https://d-nb.info/1138446343/34 |journal=Verhandlungen des Vereins zur Beförderung des Gewerbefleißes |volume=1882 |pages=449–463 |access-date=9 February 2022}}</ref><ref>{{Cite book |last=Hertz |first=Heinrich |url=https://books.google.com/books?id=0wM1AQAAMAAJ |title=Miscellaneous Papers |date=1986 |publisher=Macmillan and Co, Ltd. |location=London |pages=146–183 |access-date=13 February 2022}}</ref> on what was to become known as the field of [[contact mechanics]], which proved to be an important basis for later theories in the field. [[Joseph Valentin Boussinesq]] published some critically important observations on Hertz's work, nevertheless establishing this work on contact mechanics to be of immense importance. His work basically summarises how two [[axi-symmetric]] objects placed in contact will behave under [[Structural load|loading]], he obtained results based upon the classical theory of [[elasticity (physics)|elasticity]] and [[continuum mechanics]]. The most significant flaw of his theory was the neglect of any nature of [[adhesion]] between the two solids, which proves to be important as the materials composing the solids start to assume high elasticity. It was natural to neglect adhesion at the time, however, as there were no experimental methods of testing for it.<ref>[https://www.researchgate.net/publication/282260101_Understanding_the_tip-sample_contact_An_overview_of_contact_mechanics_at_the_nanoscale Tevis D. B. Jacobs, C. M. Mate, Kevin T. Turner, Robert W Carpick, Understanding the tip-sample contact: An overview of contact mechanics at the nanoscale, November 2013]</ref>

A [[Impact crater|crater]] that lies on the [[Far side (Moon)|far side]] of the [[Moon]], just behind the eastern limb, is the [[Hertz (crater)|Hertz crater]], named in his honor.

 

 

==Works==