Temat: LEFM - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Thermal fracture characteristics of an interface crack subjected to temperature variations
Autorzy:: Kalinović, Saša M.
Djoković, Jelena M.
Nikolić, Ružica R.
Hadzima, Branislav
Powiązania:: https://bibliotekanauki.pl/articles/1839517.pdf
Data publikacji:: 2020
Wydawca:: Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:: interface crack
two-layered sample
temperature variation
fracture properties
LEFM concept
pęknięcia
próba dwuwarstwowa
wahania temperatury
właściwości pękania
koncepcja LEFM
Opis:: Thermal fracture characteristics - the thermal energy release rate and thermal stress intensity factor of a semi-infinite crack at an interface between the two elastic isotropic materials, subjected to the temperature variations, are considered in this paper. Those characteristics are determined based on application of the linear elastic fracture mechanics (LEFM) concept. Expressions for obtained theoretical solutions are compared to solutions from literature and they are found to be more concise. Influence of the materials change on these two thermal fracture properties were observed, as well as the influence of the thickness ratio of the two layers constituting the interface.
Źródło:: Production Engineering Archives; 2020, 26, 2; 54-59
2353-5156
2353-7779
Pojawia się w:: Production Engineering Archives
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Prediction of static crack propagation in adhesive joints
Autorzy:: Hedayati, R
Jahanbakhshi, M
Ghorbani Khouzani, S
Powiązania:: https://bibliotekanauki.pl/articles/280484.pdf
Data publikacji:: 2014
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: fracture
adhesive joint
debonding
APDL
LEFM
Opis:: In this work, fracture mechanics methodology is used to predict crack propagation in the adhesive joining of aluminum and composite plates. Three types of loadings and two types of glass-epoxy composite sequences: [0/90]_2s and [0/45/-45/90]_s are considered for the composite plate. Therefore 2 × 3 = 6 cases are considered and their results are compared. The debonding initiation load, complete debonding load, crack face profile and load-displacement diagram have been compared for the six cases.
Źródło:: Journal of Theoretical and Applied Mechanics; 2014, 52, 4; 937-946
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Analysis of the LEFM concept for interfacial cracks application to coating buckling delamination in terms of substrate elastic characteristics
Autorzy:: Djoković, J. M.
Nikolić, R. R.
Miletić, I. M.
Mićunović, M. V.
Powiązania:: https://bibliotekanauki.pl/articles/280976.pdf
Data publikacji:: 2014
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: coating
buckling delamination
LEFM concept
interfacial cracks
Opis:: In this paper the buckling delamination of a coating on a flat substrate in form of a straightsided blister with special attention paid to the influence of elastic characteristics of the substrate is considered. Conditions for the buckling initiation are analyzed as well as the energy release rate and mode mixity of the interface crack as functions of the difference in elastic characteristics of the coating and the substrate. The problem is discussed from the aspect of application of the linear elastic fracture mechanics (LEFM) concept for the interfacial crack. The real angle function ! of the Dundurs parameters and and the ratio of thicknesses of the two layers are used for determination of the energy release rate and the load phase angle. Both the energy release rate along the sides of the blister and the average energy release rate at the front of the blister were calculated. The results thus obtained justify the application of the LEFM concept for interfacial cracks to the considered problem.
Źródło:: Journal of Theoretical and Applied Mechanics; 2014, 52, 1; 61-69
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Analysis of fatigue crack growth in ship structural details
Autorzy:: Leheta, H. W.
Elhewy, A. M. H.
Younes, H. A.
Powiązania:: https://bibliotekanauki.pl/articles/259607.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: fatigue crack
linear elastic fracture mechanics (LEFM)
finite element method (FEM)
Opis:: Fatigue failure avoidance is a goal that can be achieved only if the fatigue design is an integral part of the original design program. The purpose of fatigue design is to ensure that the structure has adequate fatigue life. Calculated fatigue life can form the basis for meaningful and efficient inspection programs during fabrication and throughout the life of the ship. The main objective of this paper is to develop an add-on program for the analysis of fatigue crack growth in ship structural details. The developed program will be an add-on script in a pre-existing package. A crack propagation in a tanker side connection is analyzed by using the developed program based on linear elastic fracture mechanics (LEFM) and finite element method (FEM). The basic idea of the developed application is that a finite element model of this side connection will be first analyzed by using ABAQUS and from the results of this analysis the location of the highest stresses will be revealed. At this location, an initial crack will be introduced to the finite element model and from the results of the new crack model the direction of the crack propagation and the values of the stress intensity factors, will be known. By using the calculated direction of propagation a new segment will be added to the crack and then the model is analyzed again. The last step will be repeated until the calculated stress intensity factors reach the critical value.
Źródło:: Polish Maritime Research; 2016, 2; 71-82
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: The fatigue life estimate by the LEFM concept of the tube joints exposed to axial load
Autorzy:: Djoković, J. M.
Nikolić, R. R.
Bujňák, J.
Hadzima, B.
Powiązania:: https://bibliotekanauki.pl/articles/131470.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Komisja Inżynierii Budowlanej PAN Oddział w Katowicach
Tematy:: tube joints
fatigue life
LEFM
Paris' law
złącza rurowe
trwałość zmęczeniowa
prawo paryskie
Opis:: In the tube joints the crack growth usually appears along the weld’s edge, i.e. at the spot where the chord and the brace are connected. The semi-elliptical crack the most frequently develops from the initial flaw that originated during the welding. The abrupt change in the material’s structure and response to loading are increasing the normal stresses in the lateral tube at certain spots around the crossing of the main and lateral tubes, producing the “hot spot” stress. Sensitivity to fatigue depends on combination of the cyclic loading, initial defects, environmental influences and the “hot spot” stresses which are the result of the tube walls bending during the loading of the structure. The principles of the Linear Elastic Fracture Mechanics (LEFM) are applied in this paper to analysis of the crack propagation behavior of a thin tube joints. Influence of various parameters was investigated individually and independently, and the share of the fatigue crack growth and subsequently the working life of the welded joint were estimated.
Źródło:: Roczniki Inżynierii Budowlanej; 2017, 17; 35-41
1505-8425
Pojawia się w:: Roczniki Inżynierii Budowlanej
Dostawca treści:: Biblioteka Nauki

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