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Wyszukujesz frazę "Wegener, K." wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Simulation of single grain cutting using SPH method
Autorzy:
Ruttimann, N.
Buhl, S.
Wegener, K.
Powiązania:
https://bibliotekanauki.pl/articles/100039.pdf
Data publikacji:
2010
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
single grain cutting
engineered grinding tools
smooth particle hydrodynamics
Opis:
So-called Engineered Grinding Tools (EGT) have been developed in order to satisfy the industry's demand for more efficient and cost-effective grinding tools, which differ from classic grinding tools by placing and brazing single abrasive grains in a predefined pattern onto the grinding tool body. Single grain cutting simulations form an important part towards an advanced understanding of the engineered grinding process. Cutting simulations with FE Methods encounter problems arising from large deformation and material separation. These can be overcome using meshless methods. In this work, a Smooth Particle Hydrodynamics (SPH) Method is used to model the single diamond grain cutting, which can be used as the basis process for physical simulation of the grinding process. As results the influence of the grain geometry, grain orientation and grain placement on the cutting forces, the burr generation and the chip removal rate are presented. It is shown that the cutting forces for a given grain geometry as well as the burr generation are heavily influenced by the orientation of the minor and the main cutting faces. Also cutting in material being work hardened by preceding grains, is simulated in order to be able to synthesize the grinding process from single grain cutting.
Źródło:
Journal of Machine Engineering; 2010, 10, 3; 17-29
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mobile NMR for Analysis of Polyethylene Pipes
Autorzy:
Blümich, B.
Casanova, F.
Buda, A.
Kremer, K.
Wegener, T.
Powiązania:
https://bibliotekanauki.pl/articles/2043383.pdf
Data publikacji:
2005-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Lg
82.35.Lr
76.60.-k
Opis:
NMR relaxometry is a suitable tool to determine the morphology of semi-crystalline polymers by its ability to discriminate between rigid, mostly crystalline and soft, usually amorphous material. The NMR-MOUSE$\text{}^{®}$ (nuclear magnetic resonance mobile universal surface explorer) was explored in this work to supply morphological data of poly(ethylene) pipes nondestructively. PE-100 pipes were investigated in the new state, after squeezing them flat, and after annealing well below the glass temperature. Furthermore, the change in morphology induced by a pressure load from the inside and a point load from the outside was investigated as a function of depth, and the morphology change across a welding line was imaged. A shear-band was detected by destructive high-field NMR imaging in an area of severe deformation of a pipe, where an anomalous depths profile was observed by the NMR-MOUSE. These results demonstrate that the NMR-MOUSE is a suitable tool for non-destructive state assessment of polymer pipes on the basis of laboratory reference data.
Źródło:
Acta Physica Polonica A; 2005, 108, 1; 13-23
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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