This paper presents experimental data using estimated approach to determine some mechanical properties of epoxy matrix based composites. For this reason, the epoxy matrix was made composite with the powdered materials obtained from different parts of the juniperus drupacea seeds. In order to obtain a homogeneous structure ultrasonic mixing technique was preferred. As an experimental estimation approach, the Taguchi method that is an alternative way to characterize complex composite structures,

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... o come from above the problems and to investigate the effects of test parameters-factors by performing a few experiments was used. In the study, the L9 Taguchi orthogonal array has been preferred. Based on some production conditions; bio-reinforcement material has lowered the average hardness value to 4.22 and formed a more soft structure in addition to improving the tensile strength value by 46% compared to the neat sample. Parametric study showed that; the most important parameter affecting hardness and tensile strength are the mixing time and reinforcement ratio, respectively.