Yazar "Eroglu, Mustafa Altay" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim Yok
    Öğe
    Modeling of Mechanical Properties of Wood-Polymer Composites with Artificial Neural Networks
    (North Carolina State Univ Dept Wood & Paper Sci, 2024) Eroglu, Mustafa Altay; Altun, Suat; Ciritcioglu, Hasan Huseyin
    Mechanical properties (tensile strength (TS), modulus of elasticity in tensile (MET), flexural strength (FS), modulus of elasticity (MOE)) of the material to be obtained depending on the production parameters in the production of high-density polyethylene (HDPE) wood-polymer composites with Scots pine wood flour additive were predicted using Artificial Neural Networks (ANN) model and without destructive testing. In the first stage of the study, an ANN model was developed using data from 56 different studies in the literature on the mechanical properties of wood polymer composites. In the second stage, in order to determine the reliability of the model, output values were estimated using input parameters that had not been used in training and testing of the model. Based on the same input parameters, test specimens were produced and mechanical tests were performed. The results obtained from the experiments and ANN model were compared by considering the mean absolute percentage error (MAPE) value. The coefficient of determination (R 2 ) values obtained in the training and testing phase of the ANN models were all higher than 0.90. In this way, the mechanical properties of the wood polymer composite were successfully predicted by the ANN model. Because most of the MAPE values obtained from the mechanical tests were below 10%, the model was considered a reliable model.
  • Küçük Resim Yok
    Öğe
    Vacuum Drying of Sessile Oak (Quercus Petraea) with Alternative Heating Methods
    (Kastamonu Univ, Orman Fak, 2017) Altun, Suat; Eroglu, Mustafa Altay
    Aim of study: This study was prepared to determine the optimum drying process as a result of application of different parameters of vacuum drying method which is one of the technical drying methods, and to evaluate drying quality of these methods. Area of study: This study carried out at the Karabuk University in Karabuk, Turkey and the materials was obtained from the Karabuk Yenice Forest Management Directorate. Material and Methods: Sessile Oak (Quercus Petraea) lumbers in 80 x 20 x 2.5 cm were dried at 2 m sec(-1) air velocity using two different vacuum periods of 15 and 30 minutes, 2 different heating methods namely plated and IR (infrared) in the kiln were used. Ambient pressure was set at 300 mbar in vacuum periods and 800 mbar in heating periods. Main results: It was observed that the longest drying time was 242 hours (0.15%/hour) with drying in IR heating in 30 minutes periods and the shortest drying time was 126 hours (0.22%/hour) in IR heating with 15 minutes periods. It has been found that the drying time decreases with the decrease of the waiting time in the vacuum. It has been determined that while the drying methods with 15 minutes plated heating, 15 minutes IR heating and 30 minutes IR heating meet the standard (S) drying quality class requirements, drying made with 30 minutes plated heating has reached to the high quality (Q) drying class. Research highlights: IR heating in vacuum drying of Sessile Oak can be used successfully. Shorter vacuum-heating periods leads higher drying rates in vacuum drying. Vacuum drying of lumbers wit IR heating meet the standard (S) drying quality class requirements.