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Analysis of Mechanical and Thermal Stresses in a Pressure Casting Machine Plunger

Jankowski Jacek, Kołakowski Dariusz, Pisarek Bogusław Piotr

Advances in Science and Technology. Research Journal

2020

Vol. 14, no 1

209--223

The study discusses the thermo‑mechanical stress distribution in the plunger of a cold chamber casting machine with a horizontal casting chamber in the stationary aspect. The main stresses as well as the reduced stresses were determined for four different strength hypotheses, two of which took into account different acceptable maximal tensile and compressive stresses. For comparative purposes, the calculations were performed for three different construction materials used for cold chamber pressure machine plungers: grey pearlitic cast iron, high silicon bronze and beryllium bronze, as well as one more type of bronze, which has not been used for plungers so far, i.e. aluminium‑iron‑nickel bronze, constituting the initial alloy for the newly‑developed complex bronzes with high wear resistance and elevated strength.

Numerical simulation of the elastic-plastic state of rock mass around horizontal workings

Shashenko A., Gapieiev S., Solodyankin A.

Archives of Mining Sciences

2009

Vol. 54, no 2

341-348

In the article one approach to the determine of geomechanic tasks, which take into account the rock deformation breed over the strength limit, is described. Approach is adapted to getting task's result with the help of numerical method. Verification showed that results which are got at application of this approach are adequate an analytical decision and a results of "in-situ".

Praca opisuje podejście stosowane przy określaniu zadań geomechaniki z uwzględnieniem deformacji skał powyżej granicy wytrzymałości. Podejście to stosuje się dla określenia problemu w oparciu o metody numeryczne. Weryfikacja wykazała, że uzyskane wyniki odpowiadają wynikom otrzymanym w oparciu o metody analityczne oraz o badania in situ.