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Vol: 54(68) No: 4 / December 2009 Mechanical Properties Prediction of Thermoplastic Composites using Fuzzy Models Z. C. Johanyák Institute of Information Technologies, Kecskemét College, Faculty of Mechanical Engineering and Automation, Izsáki út 10., H-6000 Kecskemét, Hungary, phone: (+3676) 516-413, e-mail: johanyak.csaba@gamf.kefo.hu, web: johanyak.hu A. M. Ádámné Institute of Metal and Polymer Technology, Kecskemét College, Faculty of Mechanical Engineering and Automation, Izsáki út 10., H-6000 Kecskemét, Hungary, phone: (+3676) 516-392, e-mail: major.andrea@gamf.kefo.hu, web: www.gamf.hu/portal/?q=gamf/oktato/adamne_major_andrea Keywords: thermoplastic composite, fuzzy modeling, LESFRI, RBE-DSS Abstract The ability to predict mechanical properties of thermoplastic composites in order to satisfy the performance requirements is of great importance in course of the design. In this paper, a general method group for data driven fuzzy modeling and its application is presented. 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