Theorie der elastischen Ringe starker Krümmung

Ohne Zusammenfassung     

Die strenge Lösung für die Ergiebigkeit eines vollkommenen Brunnens

Ohne Zusammenfassung     

Bending of simply supported rectangular plates with clamped portions along arbitrary sections of the edges

Conclusion A method of handling such a rectangular plate having special mixed boundary conditions was presented and also its reliability was investigated. The labour required for computation amounts to a substantial quantity and thus an approximate method seems to be desirable. However, such a difficulty could be solved through the use of a high speed digital computer at present. Actually, the author has taken advantage of such a devise.In conclusion, the assistance of Mr. S. Hatano and Mr. H. Okamura on numerical computation and experiments is gratefully acknowledged.     

The plastic yielding of double notched bars due to pure bending

Conclusion It is believed that all practical cases of notch shapes are covered by the above analysis. The experiments are in favour of the upper bound solution, though, for practical cases, the mean value derived from the limit analysis differs very little from that of the bounds, and it can be used with confidence.Further tests, however, are needed to confirm the deformation pattern. It is also believed that this analysis will furnish useful informations on the study on the mechanism of fracture.     

Zur Ermittlung der Wirkungslinie des Massenwiderstandes eben bewegter Scheiben und Getriebeglieder

Ohne Zusammenfassung     

Elasto-plastic bending of an annular plate at large deflection

Summary The elasto-plastic bending of a simply supported annular plate with a free inner edge upon which an uniformly distributed lateral load acts is theoretically investigated, taking into account the influence of the membrane forces. A homogeneous and isotropic elasto-perfectly-plastic material satisfying the Mises' yield condition and the Hencky's stess-strain relation is assumed. The theoretical results are discussed and compared with experimental results obtained with a plate of mild steel; the relation between the real behavior of the actual material and the usual assumptions used in the analysis is emphazised. The theoretical result is also compared with the result of an analysis in which the membrane forces were neglected; in this manner the influence of these forces is shown.

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Übersicht Das elastisch-plastische Biegen einer einfach gelagerten Ringplatte wird theoretisch untersucht, wobei der Einfluß der Membrankräfte berücksichtigt wird. Der innere Rand der Platte ist frei gelagert und trägt eine stetig verteilte Querlast. Es wird ein homogenes, isotropes und ideal elastisch-plastisches Material vorausgesetzt, das der v. Misesschen Fließbedingung und dem Henkyschen Spannungs-Dehnungs-Gesetz genügt. Die Rechenergebnisse werden diskutiert und mit entsprechenden Versuchsergebnissen verglichen, wobei besonderen Wert auf die Beziehung zwischen dem wirklichen Materialverhalten und den üblicherweise in der Theorie verwendeten Annahmen gelegt wird. Die Ergebnisse werden außerdem mit entsprechenden Berechnungsergebnissen verglichen, bei denen die Membrankräfte vernachlässigt wurden, so daß der Einfluß dieser Kräfte deutlich wird.

     

A contribution to the problem of effective particle-hole interactions

Various effects arising in nuclear-structure calculations and leading all to a renormalisation of the nucleon-nucleon interaction are reviewed. A new treatment is proposed for the renormalisation due to mixing of the particle-hole subspace and then particle ?n hole (n=2, 3, 4 etc.) subspaces.