@article{MTMT:34394297,
	title = {Végeselem környezetben definiált mozgó hőforrás analitikus validálása},
	url = {https://m2.mtmt.hu/api/publication/34394297},
	author = {Döbrentei, Sándor and Váradi, Károly},
	journal-iso = {GÉP},
	journal = {GÉP},
	volume = {74},
	unique-id = {34394297},
	issn = {0016-8572},
	year = {2023},
	pages = {53-56}
}

@article{MTMT:33711978,
	title = {FE micromodel of a cord-rubber composite tube sample subjected to uniaxial tension},
	url = {https://m2.mtmt.hu/api/publication/33711978},
	author = {Szabó, Gyula and Váradi, Károly},
	doi = {10.1177/07316844221100269},
	journal-iso = {J REINF PLAST COMP},
	journal = {JOURNAL OF REINFORCED PLASTICS AND COMPOSITES},
	volume = {42},
	unique-id = {33711978},
	issn = {0731-6844},
	abstract = {The aim of this study is to examine displacements, strains and stresses of a railway composite cord-rubber air brake tube undergoing uniaxial tension by microscale modelling.},
	year = {2023},
	eissn = {1530-7964},
	pages = {393-404}
}

@article{MTMT:33050251,
	title = {FE Micromodel of a Cord-rubber Composite Test Specimen Subjected to Uniaxial Tension},
	url = {https://m2.mtmt.hu/api/publication/33050251},
	author = {Szabó, Gyula and Váradi, Károly},
	doi = {10.3311/PPme.20363},
	journal-iso = {PERIOD POLYTECH MECH ENG},
	journal = {PERIODICA POLYTECHNICA-MECHANICAL ENGINEERING},
	volume = {66},
	unique-id = {33050251},
	issn = {0324-6051},
	abstract = {The aim of this study is to examine displacements, strains and stresses as well as to predict possible failure mechanisms arising at the yarn-matrix level of a test specimen of a railway composite cord-rubber air brake tube undergoing uniaxial tension by microscale modelling.
		Furthermore, this paper also aims to verify the material properties of the micromodel of the test specimen.
		The micromodel is based on macromodels (by matching the boundary conditions of the micromodels with displacements of the macromodels) created previously by authors of this article. The reinforcing yarns are described by an orthotropic, elastic material model, whereas the matrix has been described by a 2 parameter Mooney-Rivlin model, which all have been validated before by a uniaxial tensile test and a three-point bending test.
		Force-displacement curves of the micromodel and experimental results show a considerably good agreement.
		Yarns have a less dominant role in the load transfer mechanism of the reinforcement layers, because of the short-yarn reinforced nature of the specimen. Shear strains are high at free yarn ends marking the possible locations of failure initiation in debonding in the shear mechanism of the reinforcement layers. High shear strain values imply that the dominant mode of load transfer is shear in the matrix in the reinforcement layers.},
	year = {2022},
	eissn = {1587-379X},
	pages = {325-335}
}

@inproceedings{MTMT:32888991,
	title = {FE model of a cord-rubber railway brake tube subjected to extreme operational loads on a reverse curve test track},
	url = {https://m2.mtmt.hu/api/publication/32888991},
	author = {Szabó, Gyula and Váradi, Károly},
	booktitle = {Proceedings of the 35th ECMS International Conference on Modelling and Simulation ECMS 2021},
	unique-id = {32888991},
	abstract = {In certain cases, rolling stocks and railway vehicle components, i.e. brake tubes need to operate under extreme conditions such as at sub-zero temperature (e.g. -40°C) and on a reverse curve track, when displacements of the suspension points of the tubes cause large deformations in tubes. In this paper, displacements of the suspension points of the tubes are determined by a kinematic model validated by a draw and buffing gear test [1]. Afterwards, FE simulation has been carried out at minimum and maximum suspension point distance based on these displacements for the investigation of stress, strain states and possible failure considering the case of internal pressure and no internal pressure. Equivalent strain, stress and Tsai-Hill failure indices are much below the criterial values, so failure is not probable. The straight section between the curves of opposite curvatures reduces deformation in tubes in the critical positions leading to lower strain, stress and failure index values. © ECMS Khalid Al-Begain, Mauro Iacono, Lelio Campanile, Andrzej Bargiela (Editors)},
	keywords = {KINEMATICS; DEFORMATION; finite element method; Tubes (components); Brakes; Railroads; Equivalent strains; Suspensions (components); FE model; Extreme conditions; kinematic model; Railroad rolling stock; Critical positions; Railway vehicles; Sub-zero temperature; filament-wound composite tube; Sub-zero temperatures; Point distances; Buffing gear interaction test; Cord-rubber tube; Draw; Railway brake tube; Reverse curve; Operational loads},
	year = {2021},
	pages = {139-146}
}

@inproceedings{MTMT:32888455,
	title = {FE Simulation Of A Cord-Rubber Composite Tube Subjected To Bending Due To Operational Loads On A Railroad Reverse Curve With Extremely Low Curve Radius At Sub-Zero Temperature},
	url = {https://m2.mtmt.hu/api/publication/32888455},
	author = {Szabó, Gyula and Váradi, Károly},
	booktitle = {Proceedings of the 33rd International ECMS Conference on Modelling and Simulation},
	doi = {10.7148/2019-0377},
	unique-id = {32888455},
	year = {2019},
	pages = {377-383}
}

@article{MTMT:31082962,
	title = {Hybrid solution combining osteosynthesis and endoprosthesis for double column acetabular fractures in the elderly provide more stability with finite element model},
	url = {https://m2.mtmt.hu/api/publication/31082962},
	author = {Kocsis, András Bernát and Váradi, Károly and Szalai, Gabor and Kovacs, Tamas and Bodzay, Tamás},
	doi = {10.5606/ehc.2019.66592},
	journal-iso = {EKLEM HAST CERRAHISI},
	journal = {EKLEM HASTALIKLAN VE CERRAHISI - JOINT DISEASES AND RELATED SURGERY},
	volume = {30},
	unique-id = {31082962},
	issn = {1305-8282},
	abstract = {Objectives: This study aims to compare mechanical stability of osteosynthesis (plate and screw fixation) alone versus the same method supplemented with hip arthroplasty (hybrid solution) for double column fractures in elderly.Patients and methods: Mechanical investigations were performed on an advanced finite element pelvis model developed for double column fractures. The following simulated implant combinations were analyzed: modular acetabular basket with a ring with polyaxial screws and U-plate; plates with polyaxial screws placed on the medial-horizontal (linea terminalis) and quadrilateral bone surfaces; modular acetabular cup with U-plates; and polyaxial screws in sizes optimized based on a finite element model (FEM). Using the models, the possible shifts in peak load positions arising in different movement patterns caused by load and tension and implant deformation were measured.Results: Hybrid systems resulted in minimal deformation of the implants already available on the market. We observed less possible shifts and greater stability in the acetabular fracture zones, compared to conventional osteosynthesis alone. Optimization with available and compatible implant sizes led to a further significant increase in stability.Conclusion: Hybrid method combining osteosynthesis and prosthesis implantation provide more stability in biomechanical models in the treatment of double column fractures in elderly.},
	keywords = {acetabulum; Finite element model; Pelvic trauma; Acetabular fracture; total hip replacement; plate osteosynthesis},
	year = {2019},
	eissn = {1309-0313},
	pages = {106-111}
}

@article{MTMT:31008678,
	title = {Instability analysis of a filament-wound composite tube subjected to compression/bending},
	url = {https://m2.mtmt.hu/api/publication/31008678},
	author = {Szabó, Gyula and Váradi, Károly},
	doi = {10.1177/0963693519877417},
	journal-iso = {ADV COMPOS LETT},
	journal = {ADVANCED COMPOSITES LETTERS},
	volume = {28},
	unique-id = {31008678},
	issn = {0963-6935},
	keywords = {3D-finite element analysis; filament-wound composite tube},
	year = {2019},
	eissn = {2633-366X},
	pages = {1-13},
	orcid-numbers = {Szabó, Gyula/0000-0003-3449-0039}
}

@article{MTMT:30906167,
	title = {Összenyomásnak és hajlításnak kitett száltekercselt kompozit tömlő instabilitási vizsgálata},
	url = {https://m2.mtmt.hu/api/publication/30906167},
	author = {Váradi, Károly and Szabó, Gyula},
	journal-iso = {GÉP},
	journal = {GÉP},
	volume = {70},
	unique-id = {30906167},
	issn = {0016-8572},
	year = {2019},
	pages = {25-30}
}

@CONFERENCE{MTMT:30800880,
	title = {Fatigue design of cast iron components with surface discontinuities},
	url = {https://m2.mtmt.hu/api/publication/30800880},
	author = {Gróza, Márton György and Nadot, Yves and Váradi, Károly},
	booktitle = {12th International Fatigue Congress (FATIGUE 2018)},
	doi = {10.1051/matecconf/201816510010},
	unique-id = {30800880},
	year = {2018},
	orcid-numbers = {Gróza, Márton György/0000-0002-4261-7047}
}

@article{MTMT:30715211,
	title = {Uniaxial Tension of a Filament-wound Composite Tube at Low Temperature},
	url = {https://m2.mtmt.hu/api/publication/30715211},
	author = {Szabó, Gyula and Váradi, Károly},
	doi = {10.14513/actatechjaur.v11.n2.456},
	journal-iso = {ACTA TECH JAURIN},
	journal = {ACTA TECHNICA JAURINENSIS},
	volume = {11},
	unique-id = {30715211},
	issn = {1789-6932},
	keywords = {3D numerical model},
	year = {2018},
	eissn = {2064-5228},
	pages = {84-103}
}