TY - JOUR AU - Ipkovich, Ádám AU - Kummer, Alex AU - Kovács, László AU - Fodor, Balázs AU - Abonyi, János TI - Iterative Experimental Design and Identifiability Analysis of Composite Material Failure Models JF - HELIYON J2 - HELIYON VL - 10 PY - 2024 IS - 9 PG - 30 SN - 2405-8440 DO - 10.1016/j.heliyon.2024.e29764 UR - https://m2.mtmt.hu/api/publication/34646495 ID - 34646495 AB - The parameter identification of failure models for composite plies can be cumbersome, due to multiple effects as the consequence of brittle fracture. Our work proposes an iterative, nonlinear design of experiments (DoE) approach that finds the most informative experimental data to identify the parameters of the Tsai-Wu, Tsai-Hill, Hoffman, Hashin, max stress and Puck failure models. Depending on the data, the models perform differently, therefore, the parameter identification is validated by the Euclidean distance of the measured points to the closest ones on the nominal surface. The resulting errors provide a base for the ranking of the models, which helps to select the best fitting. Following the validation, the sensitivity of the best model is calculated through partial differentiation, and a theoretical surface is generated. Lastly, an iterative design of experiments is implemented to select the optimal set of experiments from which the parameters can be identified from the least data and minimizing the fitting error. This way, the number of experiments that is required for the model identification a composite material may be significantly reduced. We demonstrate how the proposed method selected the most optimal experiments through procedurally generated data. The results indicate that if the dataset contains enough information the method is robust and accurate. If the data set lacks the necessary information, novel material tests can be proposed based on the optimal points of the parameters' sensitivity of the generated failure model surface. LA - English DB - MTMT ER - TY - JOUR AU - Fodor, Balázs AU - Kossa, Attila TI - Stability study of the compressible Mooney-Rivlin hyperelastic model JF - JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN J2 - J STRAIN ANAL ENG VL - 59 PY - 2024 IS - 4 SP - 258 EP - 268 PG - 11 SN - 0309-3247 DO - 10.1177/03093247241233712 UR - https://m2.mtmt.hu/api/publication/34728803 ID - 34728803 N1 - Correspondence Address: Fodor, B.; BMW Group, Germany; email: balazs.fodor@bmw.de Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFIH, FK 142457 Funding text 1: The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This research was supported by the Hungarian National Research, Development and Innovation Office (FK 142457). AB - The unstable behavior of the isotropic, compressible Mooney-Rivlin hyperelastic model is investigated and described. The constitutive equation is parameterized with the help of the ground-state Poisson’s ratio and the dimensionless ratio of the material parameters [Formula: see text] and [Formula: see text]. Transverse stretch solutions are obtained for standard homogeneous loading modes, and the stress solutions are computed numerically for the physically permitted range of the ground-state Poisson’s ratio. We introduce a numerical technique to isolate subdomains with non-unique transverse stretch responses. Our analysis revealed some limitations of the model and allowed us to make critical observations about the strengths and weaknesses of the model. The analyses we present are essential to understand the characteristics of this widely used hyperelastic model. The novel results have important implications for the application of the isotropic, compressible Mooney-Rivlin hyperelastic material model. LA - English DB - MTMT ER - TY - CONF AU - Fodor, Balázs AU - Kossa, Attila TI - A Mooney-Rivlin-féle hiperelasztikus anyagmodell stabilitási vizsgálata többtengelyű terhelések esetén 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 - 106 EP - 111 PG - 6 UR - https://m2.mtmt.hu/api/publication/34728821 ID - 34728821 LA - Hungarian DB - MTMT ER - TY - CONF AU - Kovács, László AU - Berezvai, Szabolcs AU - Fodor, Balázs AU - Erdős, Gergely TI - Introduction of the concept of Intelligent Material Characterization System for reinforced and unreinforced polymeric materials for simulation purposes T2 - Book of Abstracts of NAFEMS Nordic Seminar - Materials Modelling for Engineering Simulations – Current Practice and Future Challenges PY - 2023 SP - 1 EP - 1 PG - 1 UR - https://m2.mtmt.hu/api/publication/33714499 ID - 33714499 LA - English DB - MTMT ER - TY - CONF AU - Fodor, Balázs AU - Kossa, Attila ED - Baksa, Attila ED - Bertóti, Edgár ED - Kiss, László Péter TI - A Mooney-Rivlin-féle hiperelasztikus anyagmodell stabilitási vizsgálata többtengelyű terhelés esetén T2 - XIV. Magyar Mechanikai Konferencia, Az előadások összefoglalói PB - Miskolci Egyetem, Gépészmérnöki és Informatikai Kar C1 - Miskolc-Egyetemváros SN - 9789633583012 PY - 2023 SP - 1 PG - 1 UR - https://m2.mtmt.hu/api/publication/34123930 ID - 34123930 LA - Hungarian DB - MTMT ER - TY - CONF AU - Fodor, Balázs AU - Kossa, Attila ED - Kossa, Attila TI - Stability study of the compressible Mooney-Rivlin hyperelastic model T2 - Book of Abstracts. 39th Danubia-Adria Symposium on Advances in Experimental Mechanics. 2023 Hungary PB - Gépipari Tudományos Egyesület (GTE) C1 - Siófok SN - 9789634219279 PY - 2023 SP - 68 EP - 69 PG - 2 UR - https://m2.mtmt.hu/api/publication/34180864 ID - 34180864 LA - English DB - MTMT ER - TY - PAT AU - Vásárhelyi, Gábor AU - Dücső, Csaba AU - Attila, Kis AU - Fodor, Balázs TI - Elastic covering for tactile sensors and tactile sensor array with elastic covering PY - 2008 UR - https://m2.mtmt.hu/api/publication/1978084 ID - 1978084 LA - English DB - MTMT ER - TY - JOUR AU - Vásárhelyi, Gábor AU - Fodor, Balázs AU - Roska, Tamás TI - Tactile Sensing-Processing: Interface Cover Geometry and the Inverse Elastic Problem JF - SENSORS AND ACTUATORS A-PHYSICAL J2 - SENSOR ACTUAT A PHYS VL - 140 PY - 2007 IS - 1 SP - 8 EP - 18 PG - 11 SN - 0924-4247 DO - 10.1016/j.sna.2007.05.028 UR - https://m2.mtmt.hu/api/publication/140700 ID - 140700 LA - English DB - MTMT ER - TY - PAT AU - Vásárhelyi, Gábor AU - Attila, Kis AU - Dücső, Csaba AU - Fodor, Balázs TI - Rugalmas borítás tapintásérzékelőkhöz és rugalmas borítással ellátott tapintásérzékelő elrendezés CY - Country:10001(1) PY - 2007 UR - https://m2.mtmt.hu/api/publication/1978086 ID - 1978086 LA - Hungarian DB - MTMT ER - TY - CONF AU - Vásárhelyi, Gábor AU - Fodor, Balázs TI - Enhancing Tactile Capabilities with Elastic Hemispheres T2 - Proceedings of EuroHaptics 2006 C1 - Paris PY - 2006 SP - 491 EP - 494 PG - 4 UR - https://m2.mtmt.hu/api/publication/140493 ID - 140493 LA - English DB - MTMT ER -