@CONFERENCE{MTMT:34832838,
	title = {Szénszállal erősített polimer (CFRP) kompozitok többtengelyes élmarási technológiájának vizsgálata forgácsolásindukált sorja és felületi érdesség szempontjából},
	url = {https://m2.mtmt.hu/api/publication/34832838},
	author = {Tima, Tamás Sándor and Geier, Norbert},
	booktitle = {OGÉT 2024 - XXXII. Nemzetközi Gépészeti Konferencia},
	unique-id = {34832838},
	year = {2024},
	pages = {429-434},
	orcid-numbers = {Geier, Norbert/0000-0001-7937-7246}
}

@CONFERENCE{MTMT:34829896,
	title = {Térhálós epoxy gyanta forgácsolhatósági vizsgálata hosszesztergálási kísérletekkel},
	url = {https://m2.mtmt.hu/api/publication/34829896},
	author = {Geier, Norbert and Seprős, Szilárd and Poór, Dániel István},
	booktitle = {OGÉT 2024 - XXXII. Nemzetközi Gépészeti Konferencia},
	unique-id = {34829896},
	abstract = {A térhálós polimereket előszeretettel alkalmazzák a nagyszilárdságú szálerősített polimer (FRP) kompozit szerkezetek mátrixanyagaként. Ezen FRP kompozitok forgácsolása sokszor szükséges, azonban forgácsolástechnológiai tervezésük bonyolult. Az FRP kompozitok forgácsolástechnológiai tervezésének támogatása érdekében ebben a kutatásban térhálós epoxy gyanta forgácsolhatóságát vizsgáltuk hosszesztergálási kísérletekkel. Az előtolást, a forgácsolási sebességet és a fogásmélységet variáltuk kétszintes teljes faktoriális kísérletterv alapján. A forgácsolási erőt egy KISTLER 9263A háromkomponenses erőmérővel mértük. A forgácsolt felület minőségét egy Mitutoyo SJ400 típusú kontakt profilométerrel vizsgáltuk. A fő- és kereszthatások szignifikanciáját varianciaanalízissel (ANOVA) értékeltük ki. Az ANOVA eredmények alapján mindhárom vizsgált faktornak szignifikáns hatása van a forgácsolási erőre és a felület minőségére is, így ezen faktorok körültekintő megválasztása kardinális fontosságú.},
	year = {2024},
	pages = {136-140},
	orcid-numbers = {Geier, Norbert/0000-0001-7937-7246; Poór, Dániel István/0000-0002-8036-7966}
}

@article{MTMT:34822025,
	title = {Comparative study of flame retardancy in polyimine vitrimers and composites: Evaluating additive and reactive flame retardants acting via gas-, solid-, and combined-phase mechanisms},
	url = {https://m2.mtmt.hu/api/publication/34822025},
	author = {Toldy, Andrea and Poór, Dániel István and Szolnoki, Beáta and Devecser, Boglárka and Geier, Norbert and Pomázi, Ákos},
	doi = {10.1016/j.jmst.2024.01.047},
	journal-iso = {J MATER SCI TECHNOL},
	journal = {JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY},
	volume = {196},
	unique-id = {34822025},
	issn = {1005-0302},
	abstract = {We developed flame retarded polyimine type vitrimers and carbon fibre reinforced composites using two additive and a reactive flame retardant containing phosphorus: ammonium polyphosphate (APP), resorcinol bis(diphenyl phosphate) (RDP); and N,N',N’’-tris(2-aminoethyl)-phosphoric acid triamide (TEDAP). We characterised the vitrimer matrix materials by differential scanning calorimetry (DSC), thermal analysis (TGA), limiting oxygen index (LOI), UL-94 test and mass loss calorimetry (MLC), while the vitrimer composites by LOI, UL-94 test, MLC and dynamic mechanical analysis (DMA). We compared the performance of the vitrimer systems to a benchmark pentaerythritol-based aliphatic epoxy resin system (PER). The vitrimer reference had higher thermal stability but lower fire performance than the PER aliphatic reference epoxy. At lower phosphorus content, the vitrimer systems exhibited a melting above their vitrimer transition temperature, which negatively affected their LOI and UL-94 results. From 2% phosphorus content, rapid charring and extinguishing of vitrimers prevented the softening and deforming. The superior performance of these same flame retardants in vitrimer systems could be attributed to the high nitrogen content of imine-based vitrimers in combination with phosphorus flame retardants, exploiting nitrogen-phosphorus synergism. In both matrices, flame retardants with solid phase action lead to better fire performance, while in composites, the lowest peak heat release rates (152 kW/m2 in vitrimer composite) were achieved with RDP acting predominantly in the gas phase, as carbon fibres hindered the intumescent phenomenon. © 2024},
	keywords = {PERFORMANCE; Nitrogen; differential scanning calorimetry; ADDITIVES; flame retardancy; carbon fibers; Thermoanalysis; calorimeters; Epoxy Resins; EPOXY; EPOXY; Benchmarking; Mass loss; fiber reinforced plastics; Flame retardants; Polymer composite; Polymer composite; Carbon fibre; fire performance; Limiting Oxygen Index; Flame-retardancy; Reactive flame retardants; vitrimer; vitrimer; Polyimines; polyimine},
	year = {2024},
	eissn = {1941-1162},
	pages = {101-111},
	orcid-numbers = {Toldy, Andrea/0000-0003-3569-1828; Poór, Dániel István/0000-0002-8036-7966; Szolnoki, Beáta/0000-0001-7214-9734; Geier, Norbert/0000-0001-7937-7246; Pomázi, Ákos/0000-0003-2969-8679}
}

@article{MTMT:34565460,
	title = {A comparative machinability analysis of polyimine vitrimer, epoxy and polycarbonate polymers through orthogonal machining experiments},
	url = {https://m2.mtmt.hu/api/publication/34565460},
	author = {Poór, Dániel István and Tobey, Marina and Taynton, Philip and Pomázi, Ákos and Toldy, Andrea and Geier, Norbert},
	doi = {10.1007/s00170-024-13087-9},
	journal-iso = {INT J ADV MANUFACT TECHNOL},
	journal = {INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY},
	volume = {131},
	unique-id = {34565460},
	issn = {0268-3768},
	abstract = {End-of-life management of fibre-reinforced thermoset composites is challenging due to the difficult-to-recycle reinforcements and the irreversibly polymerised thermoset matrix; therefore, researchers proposed the vitrimers as a sustainable alternative to thermosetting polymers. Although the early results of the material scientists are promising, the machinability of vitrimers has yet to be explored. Therefore, this paper aims to present a comparative machinability study of polyimine vitrimer, pentaerythritol-based epoxy (PER) and polycarbonate polymers through orthogonal machining experiments. Reflecting on the temperature-dependent properties of vitrimers, the starting temperature of the cutting tool was varied between room temperature and an elevated temperature above 155 °C. The cutting tool was heated by a 2000-W hot air gun until the surface temperature of the cutting tool, monitored by a VariocamHD thermographic IR camera (with Jenoptik IR 1.0/60 LW lens) and checked by a Fluke 51 II thermometer with a type K thermocouple, was permanently above 155 °C for 5 min. The cutting force was measured by a Kistler 9257B dynamometer, and the machined surface was characterised by a Mitutoyo Surftest SJ-400 surface roughness tester and Keyence VHX-5000 (with VH-Z20UT VH lens) microscope. The analysis of variances (ANOVA) results show that the sustainable vitrimer polymer is an appropriate substitute for thermosetting epoxy polymers, especially at low cutting temperatures.},
	year = {2024},
	eissn = {1433-3015},
	pages = {1361-1376},
	orcid-numbers = {Poór, Dániel István/0000-0002-8036-7966; Pomázi, Ákos/0000-0003-2969-8679; Toldy, Andrea/0000-0003-3569-1828; Geier, Norbert/0000-0001-7937-7246}
}

@article{MTMT:34186019,
	title = {A review on advanced cutting tools and technologies for edge trimming of carbon fibre reinforced polymer (CFRP) composites},
	url = {https://m2.mtmt.hu/api/publication/34186019},
	author = {Geier, Norbert and Xu, Jinyang and Poór, Dániel István and Dege, Jan Hendrik and Davim, J Paulo},
	doi = {10.1016/j.compositesb.2023.111037},
	journal-iso = {COMPOS PART B-ENG},
	journal = {COMPOSITES PART B-ENGINEERING},
	volume = {266},
	unique-id = {34186019},
	issn = {1359-8368},
	year = {2023},
	eissn = {1879-1069},
	orcid-numbers = {Geier, Norbert/0000-0001-7937-7246; Xu, Jinyang/0000-0001-7364-9837; Poór, Dániel István/0000-0002-8036-7966; Dege, Jan Hendrik/0000-0001-6341-2692}
}

@article{MTMT:34068311,
	title = {Impact assessment of fillers on the machinability of carbon fibre reinforced polymer composites},
	url = {https://m2.mtmt.hu/api/publication/34068311},
	author = {Magyar, Gergely and Poór, Dániel István and Lukács, Tamás and Tamás-Bényei, Péter and Geier, Norbert},
	doi = {10.1016/j.procir.2023.06.143},
	journal-iso = {PROCEDIA CIRP},
	journal = {PROCEDIA CIRP},
	volume = {118},
	unique-id = {34068311},
	abstract = {Carbon fibre reinforced polymer (CFRP) composites are widely applied due to their exceptional specific mechanical properties. The mechanical machining of these composites is often required; however, the existing expertise on the machinability of CFRP composites with fillers is deficient. Therefore, the main aim of the present study is to experimentally investigate the machinability of CFRPs with and without milled carbon fillers. Drilling experiments were conducted in different CFRP structures, and the cutting force and microgeometry were analysed through the analysis of variance (ANOVA) technique. The experimental results show that the fillers have a significant influence on the microgeometry. © 2023 Elsevier B.V.. All rights reserved.},
	keywords = {Cutting; carbon fibers; SEM; Cutting forces; Fillers; Filled polymers; Micro geometry; Carbon fiber reinforced plastics; Drilling; Impact assessments; Filler; Cutting force; CFRP; Carbon fiber reinforced polymer composite; Analysis of variance (ANOVA); Infill drilling; polymer structure; carbon fillers; Carbon fibre reinforced polymer; Mechanical machining; Milled carbon},
	year = {2023},
	eissn = {2212-8271},
	pages = {833-838},
	orcid-numbers = {Poór, Dániel István/0000-0002-8036-7966; Tamás-Bényei, Péter/0000-0002-0001-3544; Geier, Norbert/0000-0001-7937-7246}
}

@article{MTMT:34068277,
	title = {Drilling-induced delamination measurement using a novel digital image processing algorithm},
	url = {https://m2.mtmt.hu/api/publication/34068277},
	author = {Lukács, Tamás and Pereszlai, Csongor and Magyar, Gergely and Geier, Norbert},
	doi = {10.1016/j.procir.2023.06.142},
	journal-iso = {PROCEDIA CIRP},
	journal = {PROCEDIA CIRP},
	volume = {118},
	unique-id = {34068277},
	year = {2023},
	eissn = {2212-8271},
	pages = {828-832},
	orcid-numbers = {Pereszlai, Csongor/0000-0002-2336-6457; Geier, Norbert/0000-0001-7937-7246}
}

@article{MTMT:34004070,
	title = {Corrigendum to “A critical review on mechanical micro-drilling of glass and carbon fibre reinforced polymer (GFRP and CFRP) composites” [Compos B: Eng 254 (2023) 110589]},
	url = {https://m2.mtmt.hu/api/publication/34004070},
	author = {Geier, Norbert and Patra, K. and Anand, R.S. and Ashworth, S. and Balázs, Barnabás Zoltán and Lukács, Tamás and Magyar, Gergely and Tamás-Bényei, Péter and Xu, J. and Davim, J.P.},
	doi = {10.1016/j.compositesb.2023.110811},
	journal-iso = {COMPOS PART B-ENG},
	journal = {COMPOSITES PART B-ENGINEERING},
	volume = {262},
	unique-id = {34004070},
	issn = {1359-8368},
	keywords = {Engineering, Multidisciplinary},
	year = {2023},
	eissn = {1879-1069},
	orcid-numbers = {Geier, Norbert/0000-0001-7937-7246; Balázs, Barnabás Zoltán/0000-0001-5235-1388; Tamás-Bényei, Péter/0000-0002-0001-3544}
}

@article{MTMT:33862475,
	title = {Analysis and modelling of thrust force in drilling of basalt and carbon fibre-reinforced polymer (BFRP and CFRP) composites},
	url = {https://m2.mtmt.hu/api/publication/33862475},
	author = {Magyar, Gergely and Geier, Norbert},
	doi = {10.1007/s40430-023-04241-7},
	journal-iso = {J BRAZ SOC MECH SCI},
	journal = {JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING},
	volume = {45},
	unique-id = {33862475},
	issn = {1678-5878},
	abstract = {Currently, the use of sustainable products and technologies is growing; consequently, mineral-origin basalt fibre-reinforced polymer (BFRP) composites are becoming more popular in industries. Although BFRP parts require mechanical drilling operations for manufacturing holes for assembly, many challenges make the drilling process difficult. Considering that the cutting force is one of the main parameters characterising the drilling process, this study aims to analyse the influence of feed (mm/rev) and cutting speed (m/min) on the thrust force and model the thrust force in the drilling of BFRP composites through response surface methodology (RSM) and advanced statistical modelling methods. In order to determine main and interaction effects and to calculate the regression coefficients and model parameters, mechanical drilling experiments were performed, and the thrust force was recorded. The raw force data were processed using fast Fourier transformation-based low-pass filtering, and then the calculated thrust force parameters were evaluated relative to various feeds and cutting speeds. In addition, results were compared with those of carbon fibre-reinforced polymer composites. The results of the validation experiments show that both RSM and advanced statistical models accurately predict the thrust force in BFRPs of 96.74% and 95.01%, respectively. However, the advanced statistical model can describe not only the maximum values of the force but also its characteristics at a coefficient of determination of 0.68.},
	year = {2023},
	eissn = {1806-3691},
	orcid-numbers = {Geier, Norbert/0000-0001-7937-7246}
}

@article{MTMT:33804397,
	title = {A review on CFRP drilling: fundamental mechanisms, damage issues, and approaches toward high-quality drilling},
	url = {https://m2.mtmt.hu/api/publication/33804397},
	author = {Xu, Jinyang and Geier, Norbert and Shen, Jiaxin and Krishnaraj, Vijayan and Samsudeensadham, S.},
	doi = {10.1016/j.jmrt.2023.05.023},
	journal-iso = {J MATER RES TECHN},
	journal = {JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY},
	volume = {24},
	unique-id = {33804397},
	issn = {2238-7854},
	year = {2023},
	eissn = {2214-0697},
	pages = {9677-9707},
	orcid-numbers = {Xu, Jinyang/0000-0001-7364-9837; Geier, Norbert/0000-0001-7937-7246}
}