Christian Otto Mohr

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Christian Otto Mohr

Born	Christian Otto Mohr (1835-10-08)8 October 1835 Wesselburen, Duchy of Holstein
Died	2 October 1918(1918-10-02) (aged 82) Dresden, Germany
Alma mater	Leibniz University Hannover
Known for	Mohr's circle Mohr–Coulomb theory Moment-area theorem Statically indeterminate structure
Scientific career
Fields	Solid mechanics Structural engineering
Institutions	TU Dresden University of Stuttgart

Christian Otto Mohr (8 October 1835 – 2 October 1918) was a German civil engineer. He is renowned for his contributions to the field of structural engineering, such as Mohr's circle, and for his study of stress.

Biography

He was born on 8 October 1835 to a landowning family in Wesselburen in the Holstein region. At the age of 16 attended the Polytechnic School in Hannover.

Starting in 1855, his early working life was spent in railroad engineering for the Hanover and Oldenburg state railways, designing some famous bridges and making some of the earliest uses of steel trusses.

Even during his early railway years, Mohr had developed an interest in the theories of mechanics and the strength of materials. In 1867, he became professor of mechanics at Stuttgart Polytechnic, and in 1873 at Dresden Polytechnic. Mohr had a direct and unpretentious lecturing style that was popular with his students. In addition to a lone textbook, Mohr published many research papers on the theory of structures and strength of materials.

In 1874, Mohr formalised the idea of a statically indeterminate structure.

Mohr was an enthusiast for graphical tools and developed the method, for visually representing stress in three dimensions, previously proposed by Carl Culmann. In 1882, he famously developed the graphical method for analysing stress known as Mohr's circle and used it to propose an early theory of strength based on shear stress. He also developed the Williot-Mohr diagram for truss displacements and the Maxwell-Mohr method for analysing statically indeterminate structures, it can also be used to determine the displacement of truss nodes and forces acting on each member. The Maxwell-Mohr method is also referred to as the virtual force method for redundant trusses.

He retired in 1900, yet continued his scientific work in Dresden until his death on 2 October 1918.

Bibliography

Timoshenko, S. P. (1953), History of Strength of Materials ISBN 0-07-064725-9
George A. Lesieutre academic lineage at www.personal.psu.edu

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International	ISNI VIAF WorldCat
National	Germany
Academics	Mathematics Genealogy Project zbMATH
People	Deutsche Biographie DDB
Other	IdRef

Biography

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Bibliography