TY - JOUR N2 - Fuzzy logic determination of the material hardening parameters based on the Heyer’s method was applied in this research. As the fuzzy input variables, the length of two measuring bases and the maximum force registered in the Heyer’s test were used. Firstly, the numerical experiment (the simulation of the fuzzification of the input data) with the assumed disturbance of input variables was performed. Next, on the basis of experimental investigations (eleven samples made from the same material), the membership functions associated with the input data were created. After that, the fuzzy analysis was examined. Fuzzy material hardening constants obtained by means of the α-level optimization and the extension principle methods were compared. Discrete values of the hardening data are found in the defuzzification process, by application of the mass center method. L1 - http://www.czasopisma.pan.pl/Content/113023/PDF/AMM-2019-3-42-Wojcik.pdf L2 - http://www.czasopisma.pan.pl/Content/113023 PY - 2019 IS - No 3 EP - 1065 DO - 10.24425/amm.2019.129495 KW - fuzzy logic KW - Plasticity KW - material hardening parameters KW - Heyer’s method A1 - Skrzat, A. A1 - Wójcik, M. A1 - Bąk, Ł. PB - Institute of Metallurgy and Materials Science of Polish Academy of Sciences PB - Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences VL - vol. 64 DA - 2019.09.03 T1 - Fuzzy Logic Enhancement of Material Strain Hardening Data Obtained in the Heyer’s Test SP - 1059 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/113023 T2 - Archives of Metallurgy and Materials ER -