Warner T. Koiter

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Warner Tjardus Koiter (born June 16, 1914 in Amsterdam , † September 2, 1997 in Delft ) was a Dutch mechanical engineer. He worked as a professor at the TH Delft .

life and work

Koiter was the son of a teacher and grew up in Zutphen . From 1931 he studied engineering (mechanics) at the TU Delft, where he graduated with honors in 1936. He then worked as an engineer at the National Aircraft Research Institute in Amsterdam (Rijks Studiedienst voor de Luchtvaart, later Nationaal Lucht- en Ruimtevaartlaboratorium , NLR) with A. van der Neut, from 1938 to the patent authority and from 1939 to the state civil aviation authority, where he was head of the Engineering department was. During the Second World War he worked again at the predecessor institute of the NLR, which led to his dissertation with Cornelis B. Biezeno at the TU Delft in 1945 ( Over de Stabiliteit van het Elastisch Evenwicht , stability of the elastic equilibrium , Dutch). The dissertation was ready in 1942, but he waited until after the occupation to submit it, as he did not want to swear an oath on the occupying power. It was also translated into English in 1960 and published by NASA after reporting its findings at Harvard University in the late 1950s . In 1949 he became professor for applied mechanics at the TU Delft, where he switched to a specially created chair for the theory of the strength and stability of structures in 1973 (since he was considering retiring from the university after the student unrest) and retired in 1979.

He was an internationally recognized expert in mechanics and received both the Von Karman Medal (1965) and the Tymoshenko Medal (1968). At first he was known for his fundamental investigations into elastic equilibrium in continua (especially with nonlinearities in the transition to the buckling area), he dealt with linear and nonlinear shell theory and other problems of elasticity theory and plasticity theory.

In 1976 Koiter was elected a member of the Leopoldina . He was also a member of the Royal Netherlands Academy of Sciences , the American Academy of Arts and Sciences (1974), the Académie des Sciences (1981), the Royal Society (1982) and the National Academy of Engineering . In 1996 the American Society of Mechanical Engineers (ASME) donated the Warner T. Koiter Medal with him as the first prize winner in 1997. A mechanics institute at the TU Delft is named after him. He was an honorary doctor of the Universities of Glasgow, Bochum, Gent and Liège.

Jacob Willem Cohen is one of his doctoral students .

Fonts

  • WT Koiter's Elastic stability of solids and structures , Cambridge University Press 2009, editor Arnold MA van der Heijden
  • Editor of the Proceedings of the IUTAM Symposium on the theory of thin elastic shells. Delft, 24.-28. August 1959 , North Holland 1960
  • Publisher Theory of Shells , Proc. 3rd IUTAM Symposium Shell Theory, Tbilisi 1978, North Holland 1980
  • Editor Theoretical and applied mechanics. Proc. 14th IUTAM Congress, Delft 1976 , North Holland 1977
  • Stress-strain relations, uniqueness and variational theorems for elastic-plastic materials with a singular yield surface , Quarterly of Applied Mathematics, Volume 11, 1953, pp. 350-354
  • General theorems for elastic-plastic solids , in Ian Sneddon , Rodney Hill (Eds.) Progress in solid mechanics , Volume 6, North Holland, 1960/61, pp. 165-221
  • A consistent first approximation in the theory of thin elastic shells , in Koiter (Ed.) Proc. IUTAM Symp. On the theory of thin elastic shells, North Holland, 1960, pp. 12-33
  • On the nonlinear theory of thin elastic shells , parts 1-3, Proc. Con. Ned. Akad. Wet., Vol. 69, 1966, pp. 1-54
  • On the foundation of the linear theory of thin elastic shells , Proc. Con. Ned. Akad. Wet., Vol. 73, 1970, pp. 169-195
  • Stijfheid en sterkte 1: grondslagen , Haarlem, Scheltema & Holkema 1972
  • Omzien en verwondering, maar niet in wrok , in JF Besseling, AMA van der Heijden (Ed.) Trends in solid mechanics. Proc. of the Symposium dedicated to the 65th Birthday of WT Koiter , Delft University Press 1979, pp. 237-246

literature

  • Biography of DH van Campen, Biogr. Memoirs Fellows Royal Society, Volume 45, 1999
  • Karl-Eugen Kurrer The History of the Theory of Structures, Searching for Equilibrium . Berlin: Ernst & Sohn , 2018, p. 1016f. (Biography), ISBN 978-3-433-03229-9 .
  • René de Borst Warner Tjardus Koiter. Het instabiele hanteerbaar , in KF Wakker, B. Herbergs, M. vd Sanden (Ed.) Delfts Goud - leven en werk van 18 striking hoogleraren , Delft, Beta Imaginations, 2002, pp. 222-231

Individual evidence

  1. ↑ Published in 1945 by HJ Paris, Amsterdam
  2. ↑ He could have obtained his doctorate from the Rector Wilhelm Flügge (later professor at Stanford), who was then sent from Germany .
  3. ↑ The moral uncompromisingness expressed in it (he was also characterized as a samurai in a world of the Pharisees ) later remained a fixed characteristic of Koiter. M. Pignataro, Obituary in Meccanica, Volume 33, 1998, pp. 605-606.
  4. ^ The stability of elastic equilibrium , NASA, NASA-TT-F-10833; N67-25033, Washington DC 1960, 1967, Translation of the OW Leiber Research Laboratories, Online
  5. ^ List of members since 1666: letter K. Académie des sciences, accessed on January 6, 2020 (French).
  6. ^ Official ASME website for the Warner T. Koiter Medal
  7. ↑ Warner T. Koiter in the Mathematics Genealogy Project (English)Template: MathGenealogyProject / Maintenance / id used
  8. ↑ Looking back in amazement, but not in resentment
personal data
SURNAME Koiter, Warner T.
ALTERNATIVE NAMES Koiter, Warner Tjardus
BRIEF DESCRIPTION Dutch mechanical engineer
DATE OF BIRTH June 16, 1914
PLACE OF BIRTH Amsterdam
DATE OF DEATH September 2, 1997
Place of death Delft