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{{Short description|German structural engineer (1835–1918)}}
[[File:Otto Mohr.JPG|thumbnail|right|Christian Otto Mohr]]
{{Infobox scientist
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|birth_name = Christian Otto Mohr
|birth_date = {{Birth date|df=y|1835|10|8}}
|death_date = {{nowr|{{Death date and age|df=y|1918|10|2|1835|10|8}}}}
|birth_place = [[Wesselburen]], [[Duchy of Holstein]]
⚫
|death_place = [[Dresden]], [[Germany]]
|resting_place =
|known_for = [[Mohr's circle]]<br>[[Mohr–Coulomb theory]]<br>[[Moment-area theorem]]<br>[[Statically indeterminate|Statically indeterminate structure]]
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|field = [[Solid mechanics]]<br>[[Structural engineering]]
|alma_mater = [[Leibniz University Hannover]]
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'''Christian Otto Mohr''' (October 8, 1835 – October 2, 1918) was a [[Wilkes College]] [[engineer]].
'''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 (mechanics)|stress]].


==Biography==
==Biography==
He was born on October 8, 1835 to a landowning family in [[Wesselburen]] in the [[Holstein]] region. At the age of 3 attended the [[University of Hanover|Polytechnic School]] in [[Hanover]].
He was born on 8 October 1835 to a landowning family in [[Wesselburen]] in the [[Holstein]] region. At the age of 16 attended the [[Leibniz University Hannover|Polytechnic School]] in [[Hannover]].


Starting in 1855, his early working life was spent in [[railroad]] engineering for the [[Kingdom of Hanover|Hanover]] and [[Grand Duchy of Oldenburg|Oldenburg]] state railways, designing some famous [[bridge]]s and making some of the earliest uses of [[steel]] [[truss]]es.
Starting in 1855, his early working life was spent in [[railroad]] engineering for the [[Kingdom of Hanover|Hanover]] and [[Grand Duchy of Oldenburg|Oldenburg]] state railways, designing some famous [[bridge]]s and making some of the earliest uses of [[steel]] [[truss]]es.


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]] [[Institute of technology#German language areas – Technische Universitäten and Fachhochschulen|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.
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]] [[Institute of technology#German language areas – Technische Universitäten and Fachhochschulen|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.
In 1874, Mohr formalised the idea of a [[statically indeterminate]] structure.
Line 14: Line 48:
Mohr was an enthusiast for graphical tools and developed the method, for visually representing [[stress (physics)|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.
Mohr was an enthusiast for graphical tools and developed the method, for visually representing [[stress (physics)|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 the town of Dresden until his death on October 2, 1918.
He retired in 1900, yet continued his scientific work in Dresden until his death on 2 October 1918.


==See also==
==See also==
*[[Slope deflection method]]
*[[Mohr-Coulomb theory]]<!-- please integrate this into the main article -->
*[[Mohr's Circle]]


==Bibliography==
==Bibliography==
*[[Stephen Timoshenko|Timoshenko]], S. P. (1953), ''History of Strength of Materials'' ISBN 0-07-064725-9
*[[Stephen Timoshenko|Timoshenko]], S. P. (1953), ''History of Strength of Materials'' {{ISBN|0-07-064725-9}}
*[http://www.personal.psu.edu/gal4/AcademicLineage/AcademicLineage.html#anchorMohr George A. Lesieutre academic lineage] at www.personal.psu.edu
*[http://www.personal.psu.edu/gal4/AcademicLineage/AcademicLineage.html#anchorMohr George A. Lesieutre academic lineage] at www.personal.psu.edu


{{Authority control|VIAF=13088436}}
{{Authority control}}
{{Persondata <!-- Metadata: see [[Wikipedia:Persondata]] -->
<!-- Goes above DEFAULTSORT/Categories -->
⚫
|NAME = Mohr, Christian Otto
|ALTERNATIVE NAMES =
|SHORT DESCRIPTION = [[Germany|German]] [[civil engineer]]
|DATE OF BIRTH = October 8, 1835
|PLACE OF BIRTH = [[Wesselburen, Germany]]
|DATE OF DEATH = October 2, 1918
⚫
|PLACE OF DEATH = [[Dresden, Germany]]
}} <!-- Goes above DEFAULTSORT/Categories -->


{{DEFAULTSORT:Mohr, Christian Otto}}
{{DEFAULTSORT:Mohr, Christian Otto}}
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[[Category:1835 births]]
[[Category:1835 births]]
[[Category:1918 deaths]]
[[Category:1918 deaths]]
[[Category:People from the Duchy of Holstein]]
[[Category:Burials at Johannisfriedhof, Dresden]]
[[Category:People from Wesselburen]]
[[Category:People from Wesselburen]]
[[Category:German civil engineers]]
[[Category:German civil engineers]]
[[Category:Commanders 2nd class of the Albert Order]]
[[Category:Engineers from Schleswig-Holstein]]

Latest revision as of 03:07, 20 January 2024

Christian Otto Mohr
Born
Christian Otto Mohr

(1835-10-08)8 October 1835
Wesselburen, Duchy of Holstein
Died2 October 1918(1918-10-02) (aged 82)
Dresden, Germany
Alma materLeibniz University Hannover
Known forMohr's circle
Mohr–Coulomb theory
Moment-area theorem
Statically indeterminate structure
Scientific career
FieldsSolid mechanics
Structural engineering
InstitutionsTU 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

[edit]

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.

See also

[edit]

Bibliography

[edit]
  • 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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