Jakob Johann von Weyrauch

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James Weyrauch as a member of the Corps Tigurinia Zurich, 1868

Jakob Johann (James) Weyrauch , from 1899 from Weyrauch , (born October 8, 1845 in Frankfurt am Main , † February 13, 1917 in Stuttgart ) was a German mathematician , engineer and rector of the Technical University in Stuttgart .

Life

Weyrauch was born in Frankfurt am Main as the son of the businessman Robert Weyrauch and his wife Berta, nee. Waenz born. He lost his parents at an early age and grew up in the home of a Protestant pastor. He studied engineering (and at the same time mathematics and physics for teaching) from 1864 to 1867 at the Polytechnikum (member of the Corps Helvetia Zurich (WSC) ) and at the University of Zurich (member of the Corps Tigurinia ) and received his doctorate in 1868. He then did his military service and worked temporarily on the construction of the Berlin connecting line . He took part in the Franco-Prussian War in 1870/71 and then continued his studies in Brussels and Paris (Sorbonne) and traveled through England, Belgium, Germany and Austria. After his habilitation (1874) at the TH Stuttgart, he became an associate professor in 1876 and a full professor for engineering, elasticity theory , thermal theory and aeromechanics at the Technical University in Stuttgart in 1880 . He held the office of rector several times (1889–1892, 1899–1902). He turned down several appointments at other universities.

In his book General Theory and Calculation of Continuous and Simple Beams from 1873, he introduced the method of influence lines (the name comes from him). In 1874 he published the first historical analysis of graphic statics ( Die Graphische Statik. Historisches und Kritisches ).

He published the work of Robert Mayer and represented his priority (compared to Hermann von Helmholtz ) as the founder of the law of conservation of energy . He also tried to justify the structural engineering from general principles - for example based on the law of energy - and thus, according to Kurrer, assumed a pioneering role in the classical phase of structural mechanics. Because of his liberal mentality and some sharp polemics in which he was involved, he was denied recognition after Kurrer in Germany (he was neither a member of academies nor did he receive an honorary doctorate).

He was involved in a polemic with Julius Weingarten about the thermodynamic aspects of Castigliano's theorem .

Honors

politics

In 1907 he was a member of the Württemberg state parliament for a few months as a representative of the TH Stuttgart . He resigned from the mandate for health reasons.

Publications

  • General theory and calculation of continuous and simple carriers , Teubner 1873.
  • The graphic statics. Historisches und Kritisches , Zeitschrift für Mathematik und Physik, Volume 19, 1874, pp. 361–390.
  • Elastic body theory. An introduction to mathematical physics and technical mechanics , Teubner 1884.
  • About statically indeterminate frameworks and the concept of deformation work , Zeitschrift für Architektur und Ingenieurwesen 1908, pp. 91-108.
  • About the concept of deformation work in the theory of elasticity of solid bodies , Nachrichten Ges. Wiss. Göttingen 1909, pp. 242-246.
  • The Escher-Linth Canal. A historical-technical study , Orell-Füßli, Zurich 1868.
  • The strength properties and methods of calculating the dimensions of iron and steel structures , Teubner, 1876, 2nd edition. 1889.
    • English translation: Strength and calculation of dimensions of iron and steel constructions, with reference to the latest experiments , Van Nostrand, New York 1877.
  • Outline of the heat theory , Stuttgart: Konrad Wittwer, 2 volumes, 1905–1907.
  • Theory of elastic arch supports , Munich: Ackermann 1879, 2nd edition 1897.
  • Elastic arch supports , Stuttgart, K. Wittwer, 3rd edition 1911.

The presentation of his theory of retaining walls by Malverd Howe appeared in 1886 by John Wiley & Sons in New York (Retaining walls for earth, 2nd edition 1891).

literature

  • Württemberg necrology , 1917.
  • Johannes von Muralt: The Corps Tigurinia zu Zürich 1850-1940 , Zürich, 1940, pp. 199–200.
  • Karl-Eugen Kurrer The History of the Theory of Structures. Searching for Equilibrium , Ernst & Sohn 2018, p. 508f, p. 514ff, p. 926f and p. 1079f (biography), ISBN 978-3-433-03229-9 .
  • Frank Raberg : Biographical handbook of the Württemberg state parliament members 1815-1933 . On behalf of the Commission for Historical Regional Studies in Baden-Württemberg. Kohlhammer, Stuttgart 2001, ISBN 3-17-016604-2 , p. 1010-1011 .

Individual evidence

  1. ↑ Samuel Mühlberg: The Corps Helvetia Zurich (so-called Schwarz-Helvetia), co-founder of the WSC . In: Einst und Jetzt, yearbook of the Association for Corpsstudentische Geschichtsforschung eV , Volume 50, 2005, p. 490.
  2. ↑ Court and State Manual of the Kingdom of Württemberg 1907, p. 35.
personal data
SURNAME Weyrauch, Jakob Johann von
ALTERNATIVE NAMES Weyrauch, James von; Weyrauch, Johann Jakob
BRIEF DESCRIPTION German mathematician, engineer and university professor
DATE OF BIRTH October 8, 1845
PLACE OF BIRTH Frankfurt am Main
DATE OF DEATH February 13, 1917
Place of death Stuttgart