Temat: design of experiment - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Approximating curve by a single segment of B-Spline or Bézier curve directly in CAD environment
Autorzy:: Sobolak, Mariusz
Połowniak, Piotr
Marciniec, Adam
Jagiełowicz, Patrycja Ewa
Powiązania:: https://bibliotekanauki.pl/articles/176192.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Bézier curve
curve approximation
design of experiment
algorithms of simulated annealing
Opis:: The paper presents the method of approximating curves with a single segment of the B-Spline and Bézier curves. The method for determining a single curve segment using the optimization methods in the CATIA environment is shown. The algorithms of simulated annealing and design of experiment are used for optimization. For the same purpose, a new original procedure for determining the distance between the given curves using explicit parameters in the CATIA environment was also used. This approximation of the cyclic curves results in the curve oscillation as shown in the examples. The results show that the approximation method with Bézier curve using control points as “free” points can be applied to obtain the best results of approximation.
Źródło:: Advances in Manufacturing Science and Technology; 2020, 44, 3; 84-92
0137-4478
Pojawia się w:: Advances in Manufacturing Science and Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Prediction of the optimum tensile – shear strength through the experimental results of similar and dissimilar spot welding joints
Autorzy:: Mahmood, Najmuldeen Yousif
Powiązania:: https://bibliotekanauki.pl/articles/140094.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: spot welding parameters
tensile-shear force
Taguchi method
optimization
design of experiment
Opis:: Resistance spot welding is the most significant joining technique utilized in various industries, like automotive, boilers, vessels, etc., that are commonly subjected to variable tensile-shear forces due to the unsuitable use of the input spot welding variables, which mainly cause the welded joints failure during the service life of the welded assembly. So, in order to avoid such failures, the welding quality of some materials like aluminum must be improved taking into consideration the performance and weight saving of the welded structure. Thus, the need for optimizing the used welding parameters becomes essential for predicting a good welded joint. Accordingly, this study aims at investigating the influence of the spot welding variables, including the squeeze time, welding time, and current on the tensile-shear force of the similar and dissimilar lap joints for aluminum and steel sheets. It was concluded that the use of Taguchi design can improve the welded joints strength through designing the experiments according to the used levels of the input parameters in order to obtain their optimal values that give the optimum tensile-shear force as the response. As a consequence of the present work, the optimal spot welding parameters were successfully obtained.
Źródło:: Archive of Mechanical Engineering; 2020, LXVII, 2; 197-210
0004-0738
Pojawia się w:: Archive of Mechanical Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Parametric analysis of the sensitivity of a prestressed concrete beam using the DOE simulation technique
Parametryczna analiza wrażliwości belki strunobetonowej za pomocą techniki symulacyjnej DOE
Autorzy:: Woliński, Sz.
Pytlowany, T.
Powiązania:: https://bibliotekanauki.pl/articles/230714.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: planowanie eksperymentu
DOE
belka strunobetonowa
ocena wrażliwości
niezawodność konstrukcji
design of experiment
pretensioned concrete beam
sensitivity assessment
structure reliability
Opis:: The paper presents the method of simplified parametric analysis of the sensitivity of a pre-tensioned concrete beam. The presented approach is based on the DOE (design of experiments) data collection which is simulation technique allowing for identification of variables deciding about the effectiveness and costs of designed structures. Additionally, application of the hyper-surface of the construction response allows designers to the development of multi-dimensional trade-off graphs to facilitate, the assessment of the scope of changes in random state variables permitted due to the adequate criteria and selection of their values close to optimum. Design basics, procedures and results of the presented considerations of sensitivity assessment and reliability of the structure has been shown on the example of a pre-stressed concrete beam designed in accordance with the requirements and procedures of Eurocode 2.
W artykule przedstawiono metodę analizy wpływu zmiennych wejściowych na parametry charakteryzujące stan konstrukcji sprężonych w początkowej i trwałej sytuacji obliczeniowej, opartą na symulacjach komputerowych i technice zbierania informacji DOE (Design Of Experiments). Założenia, procedury i wyniki zastosowania techniki DOE przedstawiono na przykładzie belki strunobetonowej zaprojektowanej zgodnie z wymaganiami Eurokodu 2. Przeprowadzono analizę typu „what-if” wpływu wartości obciążenia i siły sprężającej w poszczególnych cięgnach (uwzględniając straty wynikające z relaksacji stali sprężającej) oraz modułu sprężystości podłużnej betonu na nośność graniczną i maksymalne ugięcie belki.
Źródło:: Archives of Civil Engineering; 2019, 65, 4; 97-112
1230-2945
Pojawia się w:: Archives of Civil Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Influence of Sawdust Ash Addition on Molding Sand Properties and Quality of Iron Castings
Autorzy:: Khuengpukheiw, R.
Veerapadungphol, S.
Kunla, V.
Saikaew, Charn
Powiązania:: https://bibliotekanauki.pl/articles/2203934.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: sawdust ash
rubber wood
molding sand
iron castings
design of experiment
trociny
drewno kauczukowe
masa formierska
odlewy żeliwne
badania projektowe
Opis:: Sand molding casting has been widely used for a long time. But, one of its main drawbacks is that surface quality of the castings is not good enough for some applications. The purposes of this research were to investigate the effect of addition of sawdust ash of rubber wood (SARW) on molding sand properties and the surface quality of iron castings and to find an appropriate level of SARW with the appropriate properties of the iron castings. The molding sand compositions for making a sand mold consisted of the recycled molding sand, bentonite, water and SARW. The percentage levels of SARW were 0%, 0.1%, 0.2%, 0.3% and 0.4%. The different proportions of molding sand samples were investigated for the molding sand properties including permeability, compression strength and hardness. The results showed that addition of SARW had an effect on the molding sand properties. The appropriate percentage proportion of molding sand was obtained at 95.8% recycled molding sand, 0.8% bentonite, 3% water and 0.4% SARW. There were statistically significant differences of mean surface roughness and hardness values of the iron castings made from molding sand samples without SARW addition and the appropriate percentage proportion of molding sand. In addition, the average surface roughness value of the iron castings made from the sand mold with the appropriate percentage proportion of molding sand was ~40% lower than those of the iron castings made from molding sand samples without SARW addition.
Źródło:: Archives of Foundry Engineering; 2022, 22, 4; 53--64
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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