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In this study, the impact damage threshold point of the composite material was determined using the optimum design parameters obtained from Fuzzy Based Taguchi Method (FBTM). It is known that both Taguchi and Fuzzy methods provide optimization of design parameters yet, in Taguchi method, optimization of design parameters is not sufficient in order to solve multi response optimization problem. Therefore, Fuzzy Logic system was combined with the Taguchi system for working out the multi response optimization problem. In this study, the low velocity impact damage analyses were implemented in a LS-DYNA 3D explicit finite element program. ASTM D7136/D7136M standard was considered during the low velocity impact analyses. In explicit finite element analyses, contact algorithms were executed to observe better damage zone shapes. Furthermore, the control parameters (termination and computation time step) were tuned to provide perfect correlation with the force-energy-time histories. Eventually, it was seen that Fuzzy Based Taguchi Method (FBTM) is much more capable of optimizing the design parameters that predict the impact damage threshold point of the composite material.

Determination of the Impact Damage Threshold Point of Composite Material Using Fuzzy-Base Taguchi Method