Temat: thermo-mechanical analysis - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Analiza naprężeń i deformacji w cienkich blachach tytanowych podczas spawania wiązką elektronów
The analysis of thermally induced stresses and distortions in thin titanium sheets during electron beam welding
Autorzy:: Adamus, K.
Lacki, P.
Dudek, A.
Powiązania:: https://bibliotekanauki.pl/articles/211636.pdf
Data publikacji:: 2014
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Obróbki Plastycznej
Tematy:: spawanie wiązką elektronów
termiczno-mechaniczna analiza
cienkie blachy
dyfrakcja rentgenowska
naprężenia własne
deformacje spawalnicze
odstęp pomiędzy blachami
electron beam welding
thermo-mechanical analysis
thin sheets
X-ray diffraction
residual stresses
weld distortions
welding gap
Opis:: W pracy przedstawiono termiczno-mechaniczną analizę procesu spawania wiązką elektronów. W procesie spawania połączono dwie cienkie blachy wykonane z różnych gatunków tytanu, Grade 2 i Grade 5. W wyniku spawania powstały znaczne deformacje blach. Model numeryczny został opracowany na podstawie Metody Elementów Skończonych, MES. Model oblicza wpływ obciążenia termicznego na pole naprężeń i przemieszczeń. Wyniki uzyskane za pomocą modelu numerycznego zostały porównane z wynikami badań eksperymentalnych. Obliczone pole naprężeń zweryfikowano poprzez porównanie obliczonych naprężeń własnych z naprężeniami zmierzonymi na powierzchni blach za pomocą metody dyfrakcji rentgenowskiej.
This paper presents a thermo-mechanical analysis of an electron beam welding process. During the process two thin sheets made of dissimilar titanium grades, Grade 2 and Grade5, were joined together. The welding processes introduced significant distortions into the sheets. The numerical model is based on finite element method. The model calculates the impact of thermal load on stress and displacement fields. The results calculated by the model were compared with the experimental results. The calculated stress field was verified by comparing residual stresses at the external surface in a given cross-section with stress values obtained by x-ray diffraction measurements.
Źródło:: Obróbka Plastyczna Metali; 2014, 25, 2; 113-126
0867-2628
Pojawia się w:: Obróbka Plastyczna Metali
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Analysis of fatigue cracks of cylinder heads in diesel engines
Autorzy:: Ashouri, H.
Beheshti, B.
Ebrahimzadeh, M. R.
Powiązania:: https://bibliotekanauki.pl/articles/279801.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: thermo-mechanical fatigue
finite element analysis
cylinder head and valve bridge cracks
Opis:: Loading conditions and complex geometry have led cylinder heads to become the most challenging parts of diesel engines. One of the most important durability problems in diesel engines is due to cracks in the valves bridge area. The purpose of this study is thermo- -mechanical analysis of cylinder heads of diesel engines using a two-layer viscoplasticity model. The results of the thermo-mechanical analysis indicate that the maximum temperature and stress occurr in the valves bridge. The results of the finite element analysis correspond with the experimental tests carried out by researchers, and illustrate cracks in cylinder heads in this region. The results of the thermo-mechanical analysis show that when the engine is running, the stress in the region is compressive, caused by thermal loading and combustion pressure. When the engine is shut off, the compressive stress turns into tensile stress because of assembly loads. The valves bridge is under cyclic tensile and compressive stress state and thus is subject to low cycle fatigue. After several cycles fatigue cracks will appear in this region. The lifetime of this part can be determined through finite element analysis instead of experimental tests. The viscous strain is greater than the plastic strain which is not negligible.
Źródło:: Journal of Theoretical and Applied Mechanics; 2016, 54, 2; 369-383
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Stress evolution mechanism and thermo-mechanical reliability analysis of copper-filled TSV interposer
Autorzy:: Chen, Yuan
Su, Wei
Huang, Hong-Zhong
Lai, Ping
Lin, Xiao-ling
Chen, Si
Powiązania:: https://bibliotekanauki.pl/articles/1841909.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:: through silicon vias
thermo-mechanical reliability
failure mechanism
finite element analysis
3D integrated packaging
thermal cycling experiment
Opis:: Through silicon via (TSV) has become one of the key emerging trends of three-dimensional (3D) packages, as it can realize vertically interconnect between stacked-dies. Due to large mismatch in thermal expansion coefficients (CTE) between the copper via and the silicon, significant mechanical stresses are induced at the interfaces when TSV structure is subjected to thermal stresses, which would greatly affect the reliability and electrical performance of TSV 3D device. In this paper, the relationship between the state of stresses and failure of TSV had been explored by combining finite element model simulation (FEM) and failure physical analysis. The position of the maximum stress of the TSV structure was obtained by FEM analysis. The relationship of stress and displacement change with temperature was also studied. And a thermal cycling experiment was conducted to validate the simulation results. Physical failure analysis after thermal cycling experiment was used to verify the degradation mechanism predicted by thermo-mechanical simulation.
Źródło:: Eksploatacja i Niezawodność; 2020, 22, 4; 705-714
1507-2711
Pojawia się w:: Eksploatacja i Niezawodność
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Influence of thermo-derivative analysis conditions on microstructure of the Al-Si-Cu alloy
Autorzy:: Dobrzański, L. A.
Krupiński, M.
Labisz, K.
Rdzawski, Z.
Powiązania:: https://bibliotekanauki.pl/articles/380745.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: aluminium alloy
thermo derivative analysis
UMSA
alloy microstructure
mechanical properties
stop aluminium
analiza termopochodna
mikrostruktura stopu
właściwości mechaniczne
Opis:: Microstructure change of the metals and alloys as a result of variable crystallisation conditions also by mind of cooling rate change influence the mechanical properties. In this work there are presented the interdependences between the cooling rate, chemical composition and microstructure of the cast aluminium alloy Al–Si–Cu as a result of the thermo-derivative analysis, using the UMSA (Universal Metallurgical Simulator and Analyzer) device. An important tool for the microstructure evaluation of the Al type AC-AlSi7Cu3Mg alloy was the light and electron scanning microscopy technique.
Źródło:: Archives of Foundry Engineering; 2011, 11, 2 spec.; 19-22
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Numerical thermo-mechanical strength analysis of an IC engine component
Autorzy:: Ali, M. A. N.
Hussein, R. A.
Hussein, H. A.
Powiązania:: https://bibliotekanauki.pl/articles/2106442.pdf
Data publikacji:: 2021
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: analiza numeryczna
silnik spalinowy
naprężenie
trwałość zmęczeniowa
numerical analysis
IC engine piston
geometrical shape
thermo-mechanical strength
stress intensity
fatigue life
Opis:: This research investigates a thermo-mechanical strength of three geometrical shape designs of an internal combustion (IC) engine piston by a finite element analysis (FEA). FEA was performed using Solidworks software for modelling geometrical piston designs, and the models were imported into ANSYS software for thermo-mechanical fatigue simulation. The work focused on predicting high stress intensity and indicated the fatigue critical regions and life of the piston shape design. AL7075-T6 aluminium alloy was used as a piston material and thermo-mechanical fatigue simulation was conducted based on the experimental stress-number of cycles recorded data from literature. Analytical results showed the similarity of the critical failure positions to some real failures in the IC engine piston, and the shape design modification of the piston. Hence, this concept can be used to satisfy the IC engine design needs at low cost.
Źródło:: International Journal of Applied Mechanics and Engineering; 2021, 26, 3; 1--11
1734-4492
2353-9003
Pojawia się w:: International Journal of Applied Mechanics and Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Characteristics of stress distribution of a multi layered cylindrical pressure vessel
Autorzy:: Somadder, Somnath
Das, Palash
Islam, Md. Ashraful
Powiązania:: https://bibliotekanauki.pl/articles/2201648.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: stress distribution
thermo-mechanical load
multi-layer pressure vessels
centripetal
centrifugal
analytical analysis
numerical analysis
rozkład naprężeń
obciążenie termomechaniczne
wielowarstwowe naczynia ciśnieniowe
analiza analityczna
analiza numeryczna
Opis:: The operation of a multilayer pressure vessel subjected to thermomechanical loads is very significant. The cylindrical pressure vessel is widely used in industrial engineering: for example, to hold a variety of different types of liquid. On thick-walled cylinders, various loading circumstances such as internal overpressure, external overpressure, heat, bending, twisting, and combinations of these load characteristics are applied. Researchers have developed a number of strategies for enhancing the strength of cylinders, including the use of multilayer cylinders and increasing the thickness of the walls. This paper presents the results of an analytical and numerical analysis of a three-layer cylinder. The Abaqus FEA software is used to determine temperature, displacement, and stress distribution of a multilayer cylinder considering the effect of centripetal and centrifugal heat flow. From the numerical analysis, it is observed that centrifugal heat flux is more hazardous than centripetal heat flux for a multi-layered cylinder under thermo-mechanical loading.
Źródło:: Journal of Mechanical and Energy Engineering; 2022, 6, 2; 1--6
2544-0780
2544-1671
Pojawia się w:: Journal of Mechanical and Energy Engineering
Dostawca treści:: Biblioteka Nauki

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