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1 Wöhler curve
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2 Wöhler-Kurve
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3 Wöhler-Kurve
Deutsch-Englisch Fachwörterbuch Architektur und Bauwesen > Wöhler-Kurve
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4 Wöhler curve
English-German dictionary of Architecture and Construction > Wöhler curve
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5 Wohler curve
- Wohler curve
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кривая Вёлера, кривая усталости
Англо-русский строительный словарь. — М.: Русский Язык. С.Н.Корчемкина, С.К.Кашкина, С.В.Курбатова. 1995.
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6 Wöhler curve
- Wöhler curve
- nкривая Вёлера, кривая усталости
Англо-русский строительный словарь. — М.: Русский Язык. С.Н.Корчемкина, С.К.Кашкина, С.В.Курбатова. 1995.
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7 Wöhler, August
SUBJECT AREA: Metallurgy[br]b. 22 June 1819 Soltau, Germanyd. 21 June 1914 Hannover, Germany[br]German railway engineer who first established the fatigue fracture of metals.[br]Wöhler, the son of a schoolteacher, was born at Soltau on the Luneburg Heath and received his early education at his father's school, where his mathematical abilities soon became apparent. He completed his studies at the Technical High School, Hannover.In 1840 he obtained a position at the Borsig Engineering Works in Berlin and acquired there much valuable experience in railway technology. He trained as an engine driver in Belgium and in 1843 was appointed as an engineer to the first Hannoverian Railway, then being constructed between Hannover and Lehrte. In 1847 he became Chief Superintendent of rolling stock on the Lower Silesian-Brandenhurg Railway, where his technical abilities influenced the Prussian Minister of Commerce to appoint him to a commission set up to investigate the reasons for the unusually high incidence of axle failures then being encountered on the railways. This was in 1852, and by 1854, when the Brandenburg line had been nationalized, Wöhler had already embarked on the long, systematic programme of mechanical testing which eventually provided him with a clear insight into the process of what is now referred to as "fatigue failure". He concentrated initially on the behaviour of machined iron and steel specimens subjected to fluctuating direct, bending and torsional stresses that were imposed by testing machines of his own design.Although Wöhler was not the first investigator in this area, he was the first to recognize the state of "fatigue" induced in metals by the repeated application of cycles of stress at levels well below those that would cause immediate failure. His method of plotting the fatigue stress amplitude "S" against the number of stress cycles necessary to cause failure "N" yielded the well-known S-N curve which described very precisely the susceptibility to fatigue failure of the material concerned. Engineers were thus provided with an invaluable testing technique that is still widely used in the 1990s.Between 1851 and 1898 Wöhler published forty-two papers in German technical journals, although the importance of his work was not initially fully appreciated in other countries. A display of some of his fracture fatigue specimens at the Paris Exposition in 1867, however, stimulated a short review of his work in Engineering in London. Four years later, in 1871, Engineering published a series of nine articles which described Wöhler's findings in considerable detail and brought them to the attention of engineers. Wöhler became a member of the newly created management board of the Imperial German Railways in 1874, an appointment that he retained until 1889. He is also remembered for his derivation in 1855 of a formula for calculating the deflections under load of lattice girders, plate girders, and other continuous beams resting on more than two supports. This "Three Moments" theorem appeared two years before Clapeyron independently advanced the same expression. Wöhler's other major contribution to bridge design was to use rollers at one end to allow for thermal expansion and contraction.[br]Bibliography1855, "Theorie rechteckiger eiserner Brückenbalken", Zeitschrift für Bauwesen 5:122–66. 1870, "Über die Festigkeitversuche mit Eisen und Stahl", Zeitschrift für Bauwesen 20:73– 106.Wöhler's experiments on the fatigue of metals were reported in Engineering (1867) 2:160; (1871) 11:199–200, 222, 243–4, 261, 299–300, 326–7, 349–50, 397, 439–41.Further ReadingR.Blaum, 1918, "August Wöhler", Beiträge zur Geschichte der Technik und Industrie 8:35–55.——1925, "August Wöhler", Deutsches biographisches Jahrbuch, Vol. I, Stuttgart, pp. 103–7.K.Pearson, 1890, "On Wöhler's experiments on alternating stress", Messeng. Math.20:21–37.J.Gilchrist, 1900, "On Wöhler's Laws", Engineer 90:203–4.ASD -
8 Wöhler-Kurve
f <qualit.mat> (Dauerfestigkeits-Schaubild) ■ Wöhler curve; stress-number curve; stress-cycle curve; SN-curve -
9 Wöhler curve
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10 Wöhler-Kurve Wöhler-Linie Wöhlerschaubild
сущ.тех. диаграмма Вёлера, кривая выносливости, кривая усталостиУниверсальный немецко-русский словарь > Wöhler-Kurve Wöhler-Linie Wöhlerschaubild
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11 Wohler's curve
кривая усталости, кривая ВелераБольшой англо-русский и русско-английский словарь > Wohler's curve
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12 Wohler's curve
кривая усталости, кривая Вёлера -
13 Wohler curve
Автоматика: кривая Велера, кривая усталости -
14 Wohler diagram
Техника: диаграмма Вёлера -
15 Wöhler test
<qualit.mat> (fatigue test) ■ Wöhlerversuch m -
16 Wöhler-Kurve
fкривая усталости [выносливости], диаграмма Вёлера -
17 Wöhler-Linie
fкривая усталости [выносливости], диаграмма Вёлера -
18 Wöhler-Schaubild
nдиаграмма деформации при растяжении, диаграмма в координатах "напряжения - деформации"Deutsch-Russische Wörterbuch polytechnischen > Wöhler-Schaubild
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19 Wöhler curve
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20 Wohler's synthesis
См. также в других словарях:
Wöhler — ist der Familienname folgender Personen: August Wöhler (1819–1914), deutscher Werkstoffwissenschaftler August Anton Wöhler (1771–1850), deutscher Agrarwissenschaftler, Tierarzt und Pädagoge Cordula Wöhler (1845–1916), deutsche Dichterin und… … Deutsch Wikipedia
Wöhler — Wohler may refer to:* Wöhler (crater), a crater on Earth s moon * Wöhler process, a chemical process used in the production of aluminum * Wöhler synthesis, the chemical reaction in which ammonium cyanate is converted into urea * August Wöhler… … Wikipedia
Wöhler — Wöhler, 1) August, Ingenieur, * Soltau 22. 6. 1819, ✝ Hannover 21. 3. 1914; ab 1840 im Eisenbahnbau tätig. Wöhler führte experimentelle und theoretische Untersuchungen von Materialeigenschaften durch und entwickelte entsprechende Apparate und… … Universal-Lexikon
WÖHLER (F.) — WÖHLER FRIEDRICH (1800 1882) Chimiste allemand né à Eschersheim, près de Francfort sur le Main et mort à Göttingen. Wöhler commence ses études de médecine à Marburg en 1820, puis à Heidelberg. Là, L. Gmelin le persuade de se consacrer à la chimie … Encyclopédie Universelle
Wöhler — Wöhler, Friedrich, geb. 31. Juli 1800 zu Eschersheim (im Kurhessischen) bei Frankfurt a. M., studirte 1820–23 in Marburg u. Heidelberg Medicin, ging dann bis 1824 zu weiterer Ausbildung zu Berzelius nach Stockholm, wurde 1824 Privatdocent der… … Pierer's Universal-Lexikon
Wöhler — Wöhler, Friedrich, Chemiker, geb. 31. Juli 1800 in Eschersheim bei Frankfurt a. M., gest. 23. Sept. 1882 in Göttingen, studierte seit 1819 in Marburg Medizin, dann in Heidelberg auch Chemie und Mineralogie, arbeitete ein Jahr lang in Berzelius… … Meyers Großes Konversations-Lexikon
Wöhler — Wöhler, Friedrich, Chemiker, geb. 31. Juli 1800 in Eschersheim bei Frankfurt a. M., 1825 Lehrer an der Gewerbeschule in Berlin, 1831 in Cassel, seit 1836 Prof. in Göttingen, gest. das. 25. Sept. 1882; entdeckte mit der Umwandlung des cyansauren… … Kleines Konversations-Lexikon
Wöhler — Wöhler, Friedrich, ausgezeichneter Chemiker, geb. 1800 zu Eschersheim bei Frankfurt, 1828 Professor an der Gewerbeschule zu Berlin, 1836 Professor der Medicin u. Director des chemischen Instituts in Göttingen, zugleich Generalinspector der hannöv … Herders Conversations-Lexikon
Wöhler — Wöhler, Friedrich … Enciclopedia Universal
Wohler — Recorded in England as Wohler and Wohlers, and in Germany as Wolle, Wollen, Woller, Wollers, Woehler, Wohler, Wohlers, Wohlerss and possibly others, this is a surname of some antiquity. It is understood to be cognate with the English name Wooler… … Surnames reference
Wöhler process — was used in the production of aluminium. It involved the reduction of anhydrous aluminium chloride with potassium, and produced powdered aluminium.In 1827, Friedrich Wöhler refined a process discovered by Hans Christian Oersted, a Danish chemist … Wikipedia