Colloquium on Fatigue / Colloque de Fatigue / Kolloquium by F. Bastenaire (auth.), Waloddi Weibull, Folke K. G. Odqvist

By F. Bastenaire (auth.), Waloddi Weibull, Folke K. G. Odqvist (eds.)

Upon the request of the overseas Union of Theoretical and utilized Mechanics (IUTAM) the Swedish nationwide Committee for Mechanics geared up a colloquium on fatigue, which was once held on the Royal Institute of know-how (Kung!. Tekniska Hogskolan) in inventory­ holm, might 25-27, 1955. 35 lectures have been added, largely facing difficulties of statistical and easy nature. one of the themes have been to be came across statis­ tical thought of fatigue, cumulative harm, mechanism of fatigue, me­ tallurgical features on fatigue, speed of fatigue cracks, fatigue at increased temperature, and fatigue at mixed stresses. Lectures have been happening at the same time in sections. every one lecturer had quarter-hour for presentation of his communique, and afterwards quarter-hour have been reserved for dialogue. Abstracts of the lectures have been allotted a couple of month prior to the colloquium. The colloquium was once attended by means of 149 individuals from the stick to­ ing international locations: Denmark (1), Finland (2), France (5), Germany (6), Italy (2), Netherlands (2), Norway (2), Poland (2), Saar (1), Spain (3), Sweden (100), Switzerland (1), uk (10), united states (8), USSR (3), and Yugoslavia (1). a whole checklist of the individuals might be came across lower than. The languages of the Colloquium have been English, French, German and Italian. No lectures have been added in Italian. additionally, all contributions to the discussions were translated to at least one of the 1st 3 languages. Statements and reviews complicated are consistently these of the person authors or individuals within the discussions.

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Additional info for Colloquium on Fatigue / Colloque de Fatigue / Kolloquium über Ermüdungsfestigkeit: Stockholm May 25–27, 1955 Proceedings / Stockholm 25–27 Mai 1955 Comptes Rendus / Stockholm 25.–27. Mai 1955 Verhandlungen

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Pour Ies valeurs de Ia sollicitation de rupture on a toujours assume, selon ce que l'on fait d'habitude en base ades considerations statistiques [5], [6], Ia valeur rapportee a la section minima et non a la section reelle de rupture. l et 2. Pour chaque valeur de la contrainte ou respectivement de la vitesse d'accroissement de la charge on a effectue de trois a cinq essais. Pour les essais sous charge constante, la moyenne des durees Nest la moyenne 10garithInique et la dispersion statistique des resultats est definie [5] par l'ecart quadratique moyen en contrainte des points experimentaux par rapport a la meilleure courbe moyenne, determinee selon Ia methode proposee par PETERSON [6].

Effect of static torsion on alternating bending Data are available from three investigators showing the effect of static torsion on alternating bending. Tests by GOUGH [4] on nickelchromium-molybdenum steel show a decrease in fatigue strength of 7 to 8 per cent for static stresses which did not produce yielding, whether the static stresses were bending or torsion. If the complementary normal stresses are computed from these data it is observed that the reduction in the endurance limit corresponding to the complementary normal stress is in closely the same proportion whether the normal stress is produced by static bending or static torsion.

EinfluB der Oberflachenbeschaffenheit auf den Spannungsverlauf und die Schwingungsfestigkeit, Berlin 1931. [10] :MINER, M. : Mach. 12, 111-115 (1945). : Metallurg. ita!. ,44, 135-144 (1952). Theories relating to fatigue of materials under combinations of stress By W. N. Findley With 1 figure Analysis of available data suggests that the phenomenon of fatigue of materials results primarily from alternating shearing stress producing cracks along shear planes, and that the resistance to fatigue fracture is influenced by other factors.

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