Mathematical modeling of phenomena of dynamic recrystallization during hot plastic deformation in high-carbon bainitic steel

Based on the research results, coefficients were determined in constitutive equations, describing the kinetics of dynamic recrystallization in high-carbon bainitic steel during hot deformation. The developed mathematical model takes into account the dependence of changing kinetics in the size evolution of the initial austenite grains, the value of strain, strain rate, temperature and time. Physical simulations were carried out on rectangular specimens measuring 10 × 15 × 20 mm. Compression tests with a plane state of deformation were carried out using a Gleeble 3800

The determination of correlation between compactibility and liquidity of molding compounds under high pressures

W pracy przedstawiono wyniki badań mających na celu określenie korelacji pomiędzy zagęszczalnością a płynnością mas formierskich pod wysokim ciśnieniem prasowania. Zakres przeprowadzonych pomiarów obejmował: oznaczenie płynności, zagęszczalności, przepuszczalności, wytrzymałości na ściskanie.The paper presents results to determine the correlation between compactibility and liquidity of molding compounds under high pressures. The scope of the research includes: liquidity, compactibility, permeability, compressive strength

Mathematical modeling of phenomena of dynamic recrystallization during hot plastic deformation in high-carbon bainitic steel

Based on the research results, coefficients were determined in constitutive equations, describing the kinetics of dynamic recrystallization in high-carbon bainitic steel during hot deformation. The developed mathematical model takes into account the dependence of changing kinetics in the size evolution of the initial austenite grains, the value of strain, strain rate, temperature and time. Physical simulations were carried out on rectangular specimens measuring 10 × 15 × 20 mm. Compression tests with a plane state of deformation were carried out using a Gleeble 3800

The determination of correlation between compactibility and liquidyty of molding compounds under high pressures

W artykule przedstawiono chronologię wykonania fizycznego prototypu przez studentów Akademii im. Jana Długosza w Częstochowie. Przedstawiono zaprojektowane modele przestrzenne w myśl zasady od pomysłu do produktu. Opisano metodę szybkiego prototypowania z wykorzystanie techniki druku 3D, dobór filamentów oraz parametrów druku.The article presents a chronology of the physical prototype implementation by students of the Jan Dlugosz University in Częstochowa. Designed spatial models were presented in accordance with the principle from idea to product. The method of rapid prototyping with the use of 3D printing technology, selection of filaments and printing parameters has been described

Design and motion analysis of rotary engine

W ramach badań opracowano model przykładowego silnika z wirującym tłokiem oraz przeprowadzono analizy dynamiki ruchu poszczególnych jego elementów w celu identyfikacji ewentualnych problemów eksploatacyjnych wynikających z przemieszczenia translacyjnego wkładki uszczelniacza rotora.The rotary engine model was designed within the research. Moreover the analysis of dynamics of engine components were performed in order to identify the possible exploitation problems concerning displacement of rotor sealer insert