TY - CONF AU - Tima, Tamás Sándor AU - Geier, Norbert TI - Szénszállal erősített polimer (CFRP) kompozitok többtengelyes élmarási technológiájának vizsgálata forgácsolásindukált sorja és felületi érdesség szempontjából T2 - OGÉT 2024 - XXXII. Nemzetközi Gépészeti Konferencia PB - Erdélyi Magyar Műszaki Tudományos Társaság (EMT) T3 - Nemzetközi Gépészeti Találkozó (OGÉT), ISSN 2068-1267 ; 32. PY - 2024 SP - 429 EP - 434 PG - 6 UR - https://m2.mtmt.hu/api/publication/34832838 ID - 34832838 LA - Hungarian DB - MTMT ER - TY - CONF AU - Geier, Norbert AU - Seprős, Szilárd AU - Poór, Dániel István TI - Térhálós epoxy gyanta forgácsolhatósági vizsgálata hosszesztergálási kísérletekkel T2 - OGÉT 2024 - XXXII. Nemzetközi Gépészeti Konferencia PB - Erdélyi Magyar Műszaki Tudományos Társaság (EMT) T3 - Nemzetközi Gépészeti Találkozó (OGÉT), ISSN 2068-1267 ; 32. PY - 2024 SP - 136 EP - 140 PG - 5 UR - https://m2.mtmt.hu/api/publication/34829896 ID - 34829896 AB - 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. LA - Hungarian DB - MTMT ER - TY - JOUR AU - Toldy, Andrea AU - Poór, Dániel István AU - Szolnoki, Beáta AU - Devecser, Boglárka AU - Geier, Norbert AU - Pomázi, Ákos TI - Comparative study of flame retardancy in polyimine vitrimers and composites: Evaluating additive and reactive flame retardants acting via gas-, solid-, and combined-phase mechanisms JF - JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY J2 - J MATER SCI TECHNOL VL - 196 PY - 2024 SP - 101 EP - 111 PG - 11 SN - 1005-0302 DO - 10.1016/j.jmst.2024.01.047 UR - https://m2.mtmt.hu/api/publication/34822025 ID - 34822025 N1 - Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, H-1111 Budapest, Műegyetem rkp. 3, Hungary MTA-BME Lendület Sustainable Polymers Research Group, Műegyetem rkp. 3, H-1111, Budapest, Hungary Budapest University of Technology and Economics, Faculty of Mechanical Engineering, Department of Manufacturing Science and Engineering, Műegyetem rkp. 3., Budapest 1111, Hungary Department of Organic Chemistry and Technology, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1111 Budapest, Műegyetem rkp. 3, Hungary HUN-REN–BME Research Group for Composite Science and Technology, Műegyetem rkp. 3., H-1111, Budapest, Hungary Export Date: 26 April 2024 CODEN: JSCTE Correspondence Address: Toldy, A.; Department of Polymer Engineering, H-1111 Budapest, Műegyetem rkp. 3, Hungary; email: atoldy@edu.bme.hu AB - 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 LA - English DB - MTMT ER - TY - JOUR AU - Poór, Dániel István AU - Tobey, Marina AU - Taynton, Philip AU - Pomázi, Ákos AU - Toldy, Andrea AU - Geier, Norbert TI - A comparative machinability analysis of polyimine vitrimer, epoxy and polycarbonate polymers through orthogonal machining experiments JF - INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY J2 - INT J ADV MANUFACT TECHNOL VL - 131 PY - 2024 SP - 1361 EP - 1376 PG - 16 SN - 0268-3768 DO - 10.1007/s00170-024-13087-9 UR - https://m2.mtmt.hu/api/publication/34565460 ID - 34565460 N1 - Department of Manufacturing Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem Rkp. 3, Budapest, 1111, Hungary MTA-BME Lendület Sustainable Polymers Research Group, Műegyetem Rkp. 3, Budapest, 1111, Hungary Mallinda Inc, Denver, CO 80229, United States Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem Rkp. 3, Budapest, 1111, Hungary Export Date: 19 February 2024 CODEN: IJATE Correspondence Address: Geier, N.; Department of Manufacturing Science and Engineering, Műegyetem Rkp. 3, Hungary; email: geier.norbert@gpk.bme.hu Funding details: Magyar Tudományos Akadémia, MTA, BO/00508/22/6 Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFI, 2018-1.3.1-VKE-2018-00011, K142517 Funding details: Nemzeti Kutatási, Fejlesztési és Innovaciós Alap, NKFIA Funding text 1: Open access funding provided by Budapest University of Technology and Economics. This research was implemented thanks to the support of the 2021-1.2.4-TÉT-2021-00050, which encourages scientific and technological cooperation between USA and Hungary. Supported by the ÚNKP-22-3-I-BME-92 and ÚNKP-23-5-3502 New National Excellence Program of the Ministry for Culture and Innovation from the source of the National Research, Development and Innovation Fund. This research was partly supported by the János Bolyai Research Scholarship of the Hungarian Academy of Sciences No. BO/00508/22/6. This research was funded by the National Research, Development and Innovation Office (2018-1.3.1-VKE-2018-00011 and NKFIH K142517). AB - 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. LA - English DB - MTMT ER - TY - JOUR AU - Geier, Norbert AU - Xu, Jinyang AU - Poór, Dániel István AU - Dege, Jan Hendrik AU - Davim, J Paulo TI - A review on advanced cutting tools and technologies for edge trimming of carbon fibre reinforced polymer (CFRP) composites JF - COMPOSITES PART B-ENGINEERING J2 - COMPOS PART B-ENG VL - 266 PY - 2023 PG - 19 SN - 1359-8368 DO - 10.1016/j.compositesb.2023.111037 UR - https://m2.mtmt.hu/api/publication/34186019 ID - 34186019 N1 - Budapest University of Technology and Economics, Faculty of Mechanical Engineering, Department of Manufacturing Science and Engineering, Budapest, 1111, Hungary Shanghai Jiao Tong University, School of Mechanical Engineering, State Key Laboratory of Mechanical System and Vibration, Shanghai, 200240, China Hamburg University of Technology, Institute of Production Management and -Technology (IPMT), Hamburg, 21073, Germany University of Aveiro, Department of Mechanical Engineering, Centre for Mechanical Engineering and Automation (TEMA), Campus Santiago, Aveiro, 3810-193, Portugal Export Date: 19 October 2023 CODEN: CPBEF Correspondence Address: Geier, N.; Budapest University of Technology and Economics, Hungary; email: geier.norbert@gpk.bme.hu Correspondence Address: Xu, J.; Shanghai Jiao Tong University, China; email: xujinyang@sjtu.edu.cn LA - English DB - MTMT ER - TY - JOUR AU - Magyar, Gergely AU - Poór, Dániel István AU - Lukács, Tamás AU - Tamás-Bényei, Péter AU - Geier, Norbert TI - Impact assessment of fillers on the machinability of carbon fibre reinforced polymer composites JF - PROCEDIA CIRP J2 - PROCEDIA CIRP VL - 118 PY - 2023 SP - 833 EP - 838 PG - 6 SN - 2212-8271 DO - 10.1016/j.procir.2023.06.143 UR - https://m2.mtmt.hu/api/publication/34068311 ID - 34068311 N1 - Budapest University of Technology and Economics, Faculty of Mechanical Engineering, Department of Manufacturing Science and Engineering, Muegyetem rakpart 3, Budapest, 1111, Hungary Budapest University of Technology and Economics, Faculty of Mechanical Engineering, Department of Polymer Engineering, Muegyetem rakpart 3, Budapest, 1111, Hungary MTA-BME Research Group for Composite Science and Technology, Muegyetem rkp. 3, Budapest, 1111, Hungary AB - 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. LA - English DB - MTMT ER - TY - JOUR AU - Lukács, Tamás AU - Pereszlai, Csongor AU - Magyar, Gergely AU - Geier, Norbert TI - Drilling-induced delamination measurement using a novel digital image processing algorithm JF - PROCEDIA CIRP J2 - PROCEDIA CIRP VL - 118 PY - 2023 SP - 828 EP - 832 PG - 5 SN - 2212-8271 DO - 10.1016/j.procir.2023.06.142 UR - https://m2.mtmt.hu/api/publication/34068277 ID - 34068277 LA - English DB - MTMT ER - TY - JOUR AU - Geier, Norbert AU - Patra, K. AU - Anand, R.S. AU - Ashworth, S. AU - Balázs, Barnabás Zoltán AU - Lukács, Tamás AU - Magyar, Gergely AU - Tamás-Bényei, Péter AU - Xu, J. AU - Davim, J.P. TI - 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] JF - COMPOSITES PART B-ENGINEERING J2 - COMPOS PART B-ENG VL - 262 PY - 2023 SN - 1359-8368 DO - 10.1016/j.compositesb.2023.110811 UR - https://m2.mtmt.hu/api/publication/34004070 ID - 34004070 N1 - Budapest University of Technology and Economics, Faculty of Mechanical Engineering, Department of Manufacturing Science and Engineering, Budapest, 1111, Hungary Indian Institute of Technology Patna, Department of Mechanical Engineering, Patna, 801103, India Birla Institute of Technology, Department of Mechanical Engineering, Patna Campus, Patna, 800014, India North of England Robotics Innovation Centre, The University of Salford, Greater Manchester, Salford, United Kingdom Budapest University of Technology and Economics, Faculty of Mechanical Engineering, Department of Polymer Engineering, Műegyetem rkp. 3, Budapest, 1111, Hungary ELKH–BME Research Group for Composite Science and Technology, Műegyetem rkp. 3, Budapest, 1111, Hungary Shanghai Jiao Tong University, School of Mechanical Engineering, State Key Laboratory of Mechanical System and Vibration, Shanghai, 200240, China University of Aveiro, Department of Mechanical Engineering, Centre for Mechanical Engineering and Automation (TEMA), Campus Santiago, Aveiro, 3810-193, Portugal Export Date: 8 June 2023 CODEN: CPBEF Correspondence Address: Geier, N.; Budapest University of Technology and Economics, Hungary; email: geier.norbert@gpk.bme.hu Correspondence Address: Xu, J.; Shanghai Jiao Tong University, China; email: xujinyang@sjtu.edu.cn LA - English DB - MTMT ER - TY - JOUR AU - Magyar, Gergely AU - Geier, Norbert TI - Analysis and modelling of thrust force in drilling of basalt and carbon fibre-reinforced polymer (BFRP and CFRP) composites JF - JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING J2 - J BRAZ SOC MECH SCI VL - 45 PY - 2023 IS - 6 PG - 11 SN - 1678-5878 DO - 10.1007/s40430-023-04241-7 UR - https://m2.mtmt.hu/api/publication/33862475 ID - 33862475 N1 - Correspondence Address: Geier, N.; Department of Manufacturing Science and Engineering, Műegyetem Rkp. 3, Hungary; email: geier.norbert@gpk.bme.hu AB - 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. LA - English DB - MTMT ER - TY - JOUR AU - Xu, Jinyang AU - Geier, Norbert AU - Shen, Jiaxin AU - Krishnaraj, Vijayan AU - Samsudeensadham, S. TI - A review on CFRP drilling: fundamental mechanisms, damage issues, and approaches toward high-quality drilling JF - JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY J2 - J MATER RES TECHN VL - 24 PY - 2023 SP - 9677 EP - 9707 PG - 31 SN - 2238-7854 DO - 10.1016/j.jmrt.2023.05.023 UR - https://m2.mtmt.hu/api/publication/33804397 ID - 33804397 N1 - State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China Department of Manufacturing Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Budapest, 1111, Hungary Department of Production Engineering, PSG College of Technology, Coimbatore, 641004, India Department of Mechanical Engineering, PSG College of Technology, Coimbatore, 641004, India Correspondence Address: Xu, J.; State Key Laboratory of Mechanical System and Vibration, China; email: xujinyang@sjtu.edu.cn LA - English DB - MTMT ER -