Autor: Polzer, A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: On the Modern CNC Milling with a Compensation of Cutting Tools and Thin-Walled Workpiec Deflections
Autorzy:: Polzer, A.
Dufkova, K.
Pokorny, P.
Powiązania:: https://bibliotekanauki.pl/articles/99493.pdf
Data publikacji:: 2015
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: milling
CNC
deflection
surface quality
prediction
Opis:: Accuracy of machined components is one of the most critical considerations for any manufacturer. However, when milling the radial force deflects the cutting tool and workpiece. It affects the precision and quality of machined surfaces. The extent of the deviations can be predicted in various mathematical models. Thus, the errors can be compensated in NC programme effectively. So it is possible to machine with high cutting conditions, and also a high quality of machined surface can be achieved. In this paper are predicted deflection of milling tools and thin-walled workpiece. The experimental results show that the overall error in the flexible milling can be captured and predicted with very high accuracy.
Źródło:: Journal of Machine Engineering; 2015, 15, 3; 33-40
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: A simple method of incorporating the effect of the Uniform Stress Hypothesis in arterial wall stress computations
Autorzy:: Joldes, G. R.
Noble, C.
Polzer, S.
Taylor, Z. A.
Wittek, A.
Miller, K.
Powiązania:: https://bibliotekanauki.pl/articles/306753.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: naprężenia własne
metoda elementów skończonych
ściana tętnicy
Uniform Stress Hypothesis
residual stress
finite element method
arterial wall stress
Opis:: Residual stress has a great influence on the mechanical behaviour of arterial wall. Numerous research groups used the Uniform Stress Hypothesis to allow the inclusion of the effects of residual stress when computing stress distributions in the arterial wall. Nevertheless, the available methods used for this purpose are very expensive, due to their iterative nature. In this paper we present a new method for including the effects of residual stress on the computed stress distribution in the arterial wall. Methods: The new method using the Uniform Stress Hypothesis enables computing the effect of residual stress by averaging stresses across the thickness of the arterial wall. Results: Being a post-processing method for the computed stress distributions, the proposed method is computationally inexpensive and, thus, better suited for clinical applications than the previously used ones. Conclusions: The resulting stress distributions and values obtained using the proposed method based on the Uniform Stress Hypothesis are very close to the ones returned by an existing iterative method.
Źródło:: Acta of Bioengineering and Biomechanics; 2018, 20, 3; 59-67
1509-409X
2450-6303
Pojawia się w:: Acta of Bioengineering and Biomechanics
Dostawca treści:: Biblioteka Nauki

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