Gerard de Josselin de Jong

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Gerard de Josselin de Jong (born March 27, 1915 in Amsterdam ; † December 2, 2012 ) was a Dutch geotechnician who was long the nestor of soil mechanics in the Netherlands.

Life

De Jong attended high school in Haarlem and in May 1941 began researching the well-known foundation engineering laboratory at the TU Delft (later GeoDelft), which had pioneered soil mechanics in the Netherlands under Keverling Buisman . Because of the occupation of the country, he was only able to finish his studies in Delft after the Second World War. De Jong was apprehended by the German Navy in September 1942 while trying to get to England in a folding boat and sentenced to death in November 1942, the sentence being commuted to 15 years imprisonment. In 1945 he was liberated in northern Germany by English troops. He then lived for two years in Amsterdam, where he mainly dealt with painting and drawing, and from 1947 for two years in Paris, where he worked for architects and at the Institute for Prestressed Concrete (Bureau d'Etude de Béton Précontraint). From 1949 he conducted research again at the Delft soil mechanics laboratory. In 1959 he received his doctorate in Delft, was Visiting Assistant Professor at the University of California, Berkeley in 1959/60 and in 1960 he became Professor of Soil Mechanics in Delft. In 1980 he retired. His successor in Delft was his student Arnold Verruijt .

De Jong is known for his theory of groundwater flow in porous media and his theory of the kinematics of granular matter in the plastic flow zone (double sliding free rotating model). In addition to theoretical work, he also developed geotechnical measurement methods.

As a pensioner he devoted himself more to his hobby, painting. But he also remained scientifically active until the 1990s.

Another student besides Verruijt is Otto Strack (University of Minnesota).

He was married to Clara Waller since 1947.

Fonts

  • Ruud J. Schotting, Hans van Duijn , Arnold Verruijt (editors): Soil mechanics and transport in porous media: Selected Works of G. de Josselin de Jong , Springer 2006 (with biographical information)
  • Josselin de Jong Statics and Dynamics in the available zone of a granular material , Delft, Uitgerij Waltman, 1959 (Dissertation TU Delft)
  • Josselin de Jong discontinuities in boundary stress fields , Geotechnics, Volume 2, 1979, p. 125

literature

Web links

Individual evidence

  1. ↑ A. Verruij: In Memoriam prof.dr.ir. G. de Josselin de Jong . In: TU Delta, Magazine van de Technische Universiteit Delft . Article from December 17, 2012 only online ( memento of the original from June 22, 2013 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. . @1@ 2Template: Webachiv / IABot / www.delta.tudelft.nl
  2. ↑ Josselin de Jong The double sliding free rotating model for granular assemblies , Geotechnique, Volume 21, 1971, pp. 155–163, Mathematical elaboration of the double sliding free rotating model , Archives of Mechanics, Volume 29, 1977, p. 561– 591, Constitutive relations for the flow of a granular material in the limit state of stress , Proc. 9. ICSMFE, Tokyo 1977, pp. 87-95, Elasto-Plastic version of the double sliding model in undrained simple shear tests , Geotechnique, Volume 38, 1988, pp. 533-555
personal data
SURNAME Josselin de Jong, Gerard de
ALTERNATIVE NAMES Jong, Gerard de Josselin de
BRIEF DESCRIPTION Dutch civil engineer and university professor
DATE OF BIRTH March 27, 1915
PLACE OF BIRTH Amsterdam
DATE OF DEATH December 2, 2012