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The Institute of Theoretical and Applied Mechanics 33 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
1.
(75)
NUMERICAL SIMULATION OF TRANSVERSE FATIGUE CRACK IN THE ROTOR SYSTEM SUPPORTED BY RADIAL ACTIVE MAGNETIC BEARINGS
Ferfecki, P.
For the purpose of efficient diagnostics of fault conditions the influence of transverse fatigue crack on dynamical behaviour of a rotor system supported by active magnet [...]
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2.
(75)
ESTIMATION OF CRITICAL VALUES FOR CRACK PROPAGATION FROM SHARP V-NOTCH
Majer, Z. ; Knésl, Z.
The aim of this paper is to investigate the beginnings of crack propagation from sharp V-notches. Stress distribution around the tip of a V-notch is described on the basi [...]
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3.
(75)
CRACK PROPAGATION CRITERIA FOR THE CRACK TERMINATING ON THE INTERFACE OF A THIN ORTHOTROPIC LAYER AND AN ORTHOTROPIC SUBSTRATE
Ševeček, O. ; Kotoul, M.
The contribution discusses possible approach for the formulation of fracture criteria for the general stress concentrators – especially a surface crack terminating at t [...]
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4.
(75)
FE analysis of growing crack of fibre reinforced composites specimen with chevron notch under three point bending
Vysloužil, T. ; Kotoul, M.
In this paper is solved a 3D analysis of growing crack of the chevron notched three-point-bending specimen. On macroscale the specimen body is modeled as an elastic homog [...]
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5.
(75)
EASY GENERATION OF MODELS/MESHES USING AN OPEN-SOURCE SOFTWARE SALOME
Hlaváček, P. ; Patzák, B.
Computer-aided engineering (CAE) represents the broad usage of computers for engineering problems. It includes computer-aided design (CAD) or computer-aided analysis (CAA [...]
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6.
(75)
PREDICTING THE DIRECTION OF CRACK PROPAGATION ALONG THE CIRCUMFERENCE OF A MODEL RAILWAY CARRIAGE UNDER VARIOUS OPERATING CONDITIONS
Janíček, P. ; Jandora, R.
This contribution deals with reliability of railway wheels as influenced by the occurrence of impaired limiting material strength. Results are presented of material inves [...]
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7.
(75)
Causes of arising inherent defects as nuclei of brittle fracture
Polák, K. ; Bošanský, J.
The occurrence of deformation twins in the ductile-to-brittle transition (DBT) temperature region were observed under different testing conditions. Mechanical twinning c [...]
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8.
(75)
Stress and strain cycle ahead the curved fatigue crack front in the thick wall
Oliva, V. ; Denk, T.
A 3D elastic-plastic FEM model with small strains was used for simulation of the deformation mechanics at the curved front of the planar fatigue crack growing in the thic [...]
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9.
(75)
3D FE analysis of bridged crack growing from the chevron notch of 3-point bending specimen
Vysloužil, T. ; Kotoul, M.
The contribution deals with the 3D analysis of the chevron notched three point bending specimen which is used to determine the fracture toughness of brittle matrix compos [...]
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10.
(75)
Monitoring of the crack growth in grooved CT-sample by potential method
Balík, J. ; Korec, L.
The calibration of the potential method DC/PD is calculated for the side-grooved CT-sample with point current inputs. The grooves are modelled by a line transition resist [...]
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11.
(76)
Component-wise partitioned finite element method for wave propagation and dynamic contact problems
Kolman, R ; Park, K.
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12.
(76)
Crack propagation in welded polyolefin pipes
Mikula, J. ; Nahlík, L.
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13.
(76)
INFLUENCE OF BI-MATERIAL INTERFACE ON CRACK PROPAGATION DIRECTION IN MULTILAYER COMPOSITE
Šestáková, L. ; Hutař, P.
A substantial number of experimentally based works indicate the changes in crack propagation direction on bi-material interface in composite laminate materials. The paper [...]
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14.
(77)
Crack propagation under nonzero mean combined loading
Janoušek, J. ; Chocholoušek, M.
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15.
(77)
INFLUENCE OF BI-MATERIAL INTERFACE AND PLASTICITY INDUCED CRACK CLOSURE ON THRESHOLD VALUES
Náhlík, L. ; Hutař, P.
The paper is devoted to fatigue crack propagation in layered materials. The influence of plasticity induced crack closure on threshold values for fatigue crack propagatio [...]
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16.
(78)
THE INFLUENCE OF CORNER POINT SINGULARITY ON CRACK BEHAVIOUR
Hutař, P. ; Náhlík, L.
The influence of corner singularity on crack behaviour for a threedimensional structure is described in this paper. The distribution of stress singularity through the thi [...]
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17.
(78)
COMPUTATIONAL FATIGUE STRENGTH PREDICTION OF TURBINE BLADE PIN JOINT
Španiel, M. ; Hrubý, Z.
Presented paper deals with computational fatigue strength prediction of high pressure level steam turbine blade pin joints. Quazi-static FE analysis of one turbine disk s [...]
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18.
(78)
INFLUENCE OF SURFACE DENTS ON ELASTOHYDRODYNAMIC AND MIXED LUBRICATION
Vaverka, M. ; Vrbka, M.
Machine parts with non-conformal contact surfaces frequently operate in elastohydrodynamic or mixed regime of lubrication. In surroundings of asperities significant chang [...]
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19.
(79)
Experimental analysis of contact stresses and contact fatigue
Macura, P. ; Halama, R.
The paper is devoted to the analysis of the contact stresses and contact fatigue, especially at the rolls of rolling mils and railway wheels. The experimental and analyti [...]
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20.
(79)
Fracture behaviour of the short crack near the stress concentrator
Hutař, P. ; Knésl, Z.
A two-parameter fracture mechanics method is applied to small cracks near a stress concentrator. The small crack in the present contribution is considered as crack influe [...]
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21.
(80)
Experimental and numerical solutions of contact fatigue
Frydrýšek, K. ; Halama, R.
This article shows: 1. Some studies of a low-cycle material fatigue caused by cyclical contact between two spheres with the same diameters. The spheres are made up from m [...]
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22.
(80)
Kinetics of fatigue crack growth in eurofer 97 steel
Kruml, T. ; Polák, J.
The fatigue crack growth rate in the Eurofer 97 steel was measured by two different methodologies. Small crack growth data were obtained using cylindrical specimens with [...]
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23.
(80)
Mandrel coldworking: computation of residual stresses and fatigue crack growth retardation
Materna, A. ; Michlík, P.
Abstrakt:
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24.
(80)
Creep-fatigue crack growth in a superheater header
Korouš, J. ; Masák, J.
Structures operating at high temperatures are damaged by creep processes. If the structure is also subjected to cyclic loading, the fatigue damage is usually significant. [...]
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25.
(80)
Fatigue crack growth prediction in the small transport aircraft landing gear bracket
Doubrava, R. ; Růžek, R.
The crack growth prediction techniques in the critical area of the small transport aircraft undercarriage bracket has been describe in this paper. Stress-state was determ [...]
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26.
(81)
Simulation of crack propagation in steam turbine blade lock
Růžička, J. ; Jurenka, J.
This paper presents a simulation of 3D curved crack propagation in a steam turbine blade lock. These fatigue cracks are often initiated near a blade root contact zone. Tw [...]
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27.
(82)
IMPLEMENTATION OF K-T TWO PARAMETER APPROACH INTO NUMERICAL MODEL OF FATIGUE CRACK PROPAGATION
Jurenka, J. ; Kuželka, J.
V příspěvku jsou uvedeny některé výsledky výzkumu MKP modelování šíření únavových trhliny v podmínkách smíšeného módu namáhání. Pro simulování r [...]
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28.
(82)
Fatigue crack propagation in railway axles
Pokorný, P. ; Hutař, P.
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29.
(82)
The effect of V-notch on the propagation rate of a fatigue crack
Hutař, V. ; Knésl, Z.
Abstrakt:
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30.
(82)
MODELING OF FATIGUE CRACK GROWTH IN CERAMICS UNDER COMPRESSIVE CYCLING
Eliáš, J. ; Le, J.-L.
This contribution presents a simple numerical model for crack growth under mode-I compressive fatigue loading. Residual tensile stress at the crack tip, which is responsi [...]
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31.
(82)
Quantitative assessment of the T-stress in short fatigue crack propagation
Seitl, S. ; Knésl, Z.
Abstrakt:
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32.
(83)
Crack growth aspects of mixed modes
Brož, P. ; Novotný, R.
To the interpretation of crack growth, it is substantial to estimate the plastic region geometry in front of a crack. Performed here is a study for predicting crack growt [...]
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33.
(100)
SIMULATION OF FATIGUE CRACK PROPAGATION UNDER CONTACT LOADING CONDITIONS
Jurenka, J. ; Kuželka, J.
The article is a contribution to numerical simulations of pitting arise phenomena on the gear teeth. The basic assumption of the presented simulations was that pitting (p [...]
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