Temat: boundary behavior - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Analysis of Tilted Columnar Dendrites at Grain Boundaries During Wire and Laser Additive Manufacturing: a Phase-Field Study
Autorzy:: Zong, Nanfu
Sun, Weizhao
Liang, Xinghong
Jing, Tao
Powiązania:: https://bibliotekanauki.pl/articles/27313866.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: wire and laser additive manufacturing
tilted columnar dendrites
overgrowth behavior
phase field simulation
grain boundary
Opis:: Tilted columnar dendritic morphologies are usually existed in wire and laser additive manufactured parts of GH3039 alloy. Overgrowth behaviors induced by the tilted dendritic arrays with a large tilted angle, and the effect of the angle between the growth direction and the direction vertical locally to the solid substrate on primary spacing, solute concentration and morphological evolution have been investigated at both the converging and the diverging grain boundaries through the phase-field simulation. The formation of cracking depends on solidification behaviors including columnar dendrites growth and micro-segregation in the interdendritic region. Furthermore, the effect of the tilted columnar dendrites on the susceptibility of crack is investigated during wire and laser additive manufacturing.
Źródło:: Archives of Metallurgy and Materials; 2023, 68, 2; 469--475
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Blow-up behavior in nonlocal vs local heat equations
Autorzy:: Souplet, Philippe
Powiązania:: https://bibliotekanauki.pl/articles/1207661.pdf
Data publikacji:: 2000
Wydawca:: Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:: asymptotic behavior
boundary behavior
nonlinear parabolic equations
blow-up profiles
nonlocal source
finite time blow-up
Opis:: We present some recent results on the blow-up behavior of solutions of heat equations with nonlocal nonlinearities. These results concern blow-up sets, rates and profiles. We then compare them with the corresponding results in the local case, and we show that the two types of problems exhibit "dual" blow-up behaviors.
Źródło:: Banach Center Publications; 2000, 52, 1; 221-226
0137-6934
Pojawia się w:: Banach Center Publications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Strong decay for one-dimensional wave equations with nonmonotone boundary damping
Autorzy:: Pierre, M.
Vancostenoble, J.
Powiązania:: https://bibliotekanauki.pl/articles/205904.pdf
Data publikacji:: 2000
Wydawca:: Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:: równanie falowe
stabilność
asymptotic behavior
boundary control
d'Alembert formula
distribute parameter system
global existence
nonliner control system
nonmonotone feedback
stabilization
wave equation
Opis:: This paper is a contribution to the following question : consider the classical wave equation damped by a nonlinear feedback control which is only assumed to decrease the energy. Then, do solutions to the perturbed system still exist for all time? Does strong stability occur in the sense that the energy tends to zero as time tends to infinity? We prove here that the answer to both questions is positive in the specific case of the one-dimensional wave equation damped by boundary controls which are functions of the observed velocity. The main point is that no monotonicity assumption is made on the damping term.
Źródło:: Control and Cybernetics; 2000, 29, 2; 473-484
0324-8569
Pojawia się w:: Control and Cybernetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Novel Technique to Produce Hybrid P/M Components Using Dissimilar Ferrous Alloys
Autorzy:: Oh, Min Chul
Seok, Hyunjoo
Jo, Yeongcheol
Ahn, Byungmin
Powiązania:: https://bibliotekanauki.pl/articles/356957.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: hybrid Fe alloy
multi-compaction
interface boundary
diffusion behavior
Opis:: The objective of the present research is to develop the novel multi-compaction technology to produce hybrid structure in powder metallurgy (P/M) components using dissimilar Fe-based alloys. Two distinct powder alloys with different compositions were are used in this study: Fe-Cr-Mo-C pre-alloyed powder for high strength and Fe-Cu-C mixed powder for enhanced machinability and lower material cost. Initially, Fe-Cu-C was pre-compacted using a bar-shaped die with lower compaction pressure. The green compact of Fe-Cu-C alloy was inserted into a die residing a half of the die, and another half of the die was filled with the Fe-Cr-Mo-C powder. Then they subsequently underwent re-compaction with higher pressure. The final compact was sintered at 1120°C for 60 min. In order to determine the mechanical behavior, transverse rupture strength (TRS) and Vickers hardness of sintered materials were measured and correlated with density variations. The microstructure was characterized using optical microscope and scanning electron microscope to investigate the interfacial characteristics between dissimilar P/M alloys.
Źródło:: Archives of Metallurgy and Materials; 2019, 64, 2; 613-616
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Omnipresent holomorphic operators and maximal cluster sets
Autorzy:: González, Luis
Powiązania:: https://bibliotekanauki.pl/articles/967650.pdf
Data publikacji:: 1992
Wydawca:: Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:: holomorphic operators
maximal cluster sets
boundary behavior
residual sets
derivatives and antiderivatives
Źródło:: Colloquium Mathematicum; 1992, 63, 2; 315-322
0010-1354
Pojawia się w:: Colloquium Mathematicum
Dostawca treści:: Biblioteka Nauki

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