Temat: numerical simulation studies - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Numerical Simulation Studies on the Process of Machining of Shafts with Low Rigidity
Autorzy:: Świć, A.
Gola, A.
Powiązania:: https://bibliotekanauki.pl/articles/117946.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Promocji Wiedzy
Tematy:: turning
shaft with low rigidity
numerical simulation studies
Opis:: The paper presents a computer program developed for the determination of the basic dynamic characteristics of the process of machining, numerical simulations of the dynamic system of the process of machining, and graphic presentations of the numerical simulations performed. Results of simulations of the runs of time and frequency characteristics of the process of machining with variable machining parameters are presented. High goodness-of-fit of the model with the actual process of turning was achieved.
Źródło:: Applied Computer Science; 2016, 12, 2; 42-53
1895-3735
Pojawia się w:: Applied Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Modeling of Solid Propellants Viscoplastic Behavior Using Evolutionary Algorithms
Autorzy:: Zalewski, R.
Pyrz, M.
Wolszakiewicz, T.
Powiązania:: https://bibliotekanauki.pl/articles/357992.pdf
Data publikacji:: 2010
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: solid rocket fuel
experimental studies
modeling
constitutive law
evolutionary algorithms
numerical simulation
Opis:: In the paper an initial attempt to the experimental analysis of viscous effects, characteristic for homogeneous solid rocket fuels is proposed. For this reason uniaxial tensile experiments, carried out on dumbbell homogeneous solid propellants have been chosen. Laboratory tests have been carried out on INSTRON tensile testing machine. Research schedule involved destructive tensile tests with various strain rates. Three different values of strain rates have been taken into consideration. Experimentally obtained hardening curves are presented in suitable diagrams. Basing on obtained results, authors confrm the viscoplastic behavior of studied materials. Essential impact of the applied strain rate on the position of experimental hardening curves is observed. Acquired results are the base for the further stage of investigations of homogeneous solid propellants – the modeling of their physical properties. Additionally, numerical modeling of studied phenomena, using the viscoplastic Chaboche’s model, identifed on the basis of experimental data, is presented. The material parameters of the constitutive law are determined numerically using an evolutionary algorithm procedure. The effciency of the model and the identifcation approach are discussed.
Źródło:: Central European Journal of Energetic Materials; 2010, 7, 4; 289-300
1733-7178
Pojawia się w:: Central European Journal of Energetic Materials
Dostawca treści:: Biblioteka Nauki

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