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Öğe Investigation of mechanical properties of composites obtained from textile wastes(Batman Üniversitesi, 2022-07-02) Adin, Mehmet ŞükrüThe textile industry is one of the manufacturing sectors that pollutes the world the most. Since textile wastes are destroyed by burning traditionally, they cause great damage to the environment. Therefore, recycling of these wastes is of great importance. One of these recycling methods is their use in the production of composite materials, the application areas of which have increased in recent years. In this study, the mechanical properties of composite materials produced using cotton and polyester fabrics from waste textiles were investigated. It has been observed that 22% of the composite materials produced with reinforcement elements at different angles (0°, 45°, 90°) are reinforcement elements and 78% are resins. As a result of the tensile tests, the highest tensile strength value was obtained with the polyester fabric with 0° reinforcement angle as 55.72 MPa. It has been found that the increase in the reinforcement angles positively affects the tensile strength in cotton fabric reinforced composites, whereas this situation occurs in the opposite way in polyester fabric reinforced composites. When the highest tensile strength values of polyester fabric and cotton fabric reinforced composite samples were compared, it was seen that the sample using polyester fabric (55.72 MPa) had 69% higher tensile strength than the sample using cotton fabric (33.05 MPa). In addition, the elongation values of polyester fabric reinforced composites were higher than cotton fabric reinforced composites.Öğe Investigation of optimal MIG welding parameters and energy consumption for Invar alloys(Batman Üniversitesi, 2022-07-02) Adin, Mehmet ŞükrüInvar alloys are materials used in aviation and aerospace industries to make precision components and test equipment due to their excellent coefficient of thermal expansion. Therefore, the diversity of the joining methods of these materials and their joint strength have gained importance. In the presented study, the optimum welding parameters required for the minimum use of energy consumed during MIG welding of Invar alloy materials and for the joints to have the highest tensile strength were investigated. The lowest tensile strength was found to be 375 MPa at 15 mm/s welding speed and 6 mm/s wire feeding speed, and the highest tensile strength was 405 MPa at 20 mm/s welding speed and 18 mm/s wire feed. It has been understood that the power consumed for joining Invar alloy bars generally increases in direct proportion to the parameter increases up to 20 mm/s welding speed. It was observed that the lowest consumed power value was 1.61 kW with 15 mm/s welding speed and 6 mm/s wire feeding speed, while the highest consumed power value was 3.93 kW with 25mm/s welding speed and 18 mm/s wire feeding speed. It has been understood that an average of 38% energy savings can be achieved thanks to the optimum parameters obtained.Öğe Investigation of the most suitable drilling parameters and power consumption for energy saving(Batman Üniversitesi, 2022-07-02) Adin, Mehmet ŞükrüDue to the continuous increase in the cost of energy used in the manufacturing industry, the cost of the product is also increasing. Therefore, studies that do not affect product quality and save energy gain importance. For this purpose, in this study, the minimum amount of energy required to obtain the best hole surface quality was investigated by blind drilling of the AISI 4140 workpiece with a 5.2 mm diameter AISI M2 HSS drill at different spindle speeds (1000, 2000, 3000 rev/min) and different feed rates (150, 200, 250 mm/min). When the effects of drilling parameters on the surface roughness were examined, it was understood that it tended to decrease depending on the increase in the number of revolutions, and increased depending on the increase in the feed rate. It has been understood that the power required (consumed) of the CNC vertical machining center to open blind holes on the workpiece increases in direct proportion to the increase in cutting and feed rate. It was found that 3000 rpm and 150 mm/min feed rate were the most suitable machining parameters for the lowest surface roughness and the required optimum power value was 3.14 watts. As a result of the study, it has been understood that at least 11% energy saving can be achieved thanks to the determined parameters and optimum power value.Öğe Investigation of the most suitable machining parameters for quasi-isotropic carbon fiber reinforced composites(5th International Bursa Scientific Researchs Congress, 2024) Adin, Mehmet ŞükrüCarbon fiber reinforced composites are widely used materials in the aerospace and aviation industries due to their superior properties. In order to make such materials ready for use, machining is required. However, various difficulties are encountered during the machining of these materials. Therefore, great importance is attached to research on high-quality machining of these materials. For this purpose, in this research, carbon fiber reinforced epoxy composite with "0°/45°/90°" fiber angles (known as quasi-isotropic fiber orientation), which creates a more uniform strength distribution, was chosen as the workpiece. In this context, average surface roughness (Ra) values were investigated by drilling the carbon fiber reinforced epoxy composite workpiece with a 5.2 mm diameter High Speed Steel (HSS) drill at different spindle speeds (1200, 2400, 4800 rev/min) and different feed rates (0.04, 0.12, 0.20 mm/rev) parameters. As a result of the experimental study carried out, it was observed that the surface roughness increased depending on the increase in the feed rate, and decreased depending on the increase in the number of revolutions. The smallest surface roughness value was found as 2.15 μm, and the largest surface roughness value was found as 4.15 μm. It was revealed that the largest surface roughness value was 93% higher than the smallest surface roughness value.Öğe Investigation of optimum friction welding parameters and energy consumption for Ramor 500 and AISI 420 steels(Batman Üniversitesi, 2022-07-02) Adin, Mehmet ŞükrüRamor steels are widely used materials in the defence and automotive industries due to their superior strength to high-speed impacts. However, many problems are encountered during the use of traditional fusion welds, which are applied to join these steel types with dissimilar metal materials. Therefore, in recent years, friction welding known as solid state welding method has attracted attention instead of traditional melting welding. In this experimental study, the effects of different welding parameters applied during friction welding of Ramor 500 and AISI 420 rod materials on the tensile strength of the joints were examined and the most suitable welding parameters were investigated. In addition, the optimum power requirement for energy saving has been examined. It was found that the lowest tensile strength was 575 MPa for 5 seconds friction time and 45 MPa friction pressure parameters, while the highest tensile strength was 633 MPa for 7 seconds friction time and 55 MPa friction pressure parameters. It was observed that the lowest consumed power was 1.44 kW at 5 seconds friction time and 45 MPa friction pressure, while the highest consumed power was 2.45 kW at 9 seconds friction time and 55 MPa friction pressure. Thanks to the obtained data, the optimum power requirement was determined and 10% energy saving was achieved.Öğe Optimization of mechanical properties of composites obtained from textile wastes using Taguchi and ANOVA methods(Batman Üniversitesi, 2022-07-02) Adin, Mehmet ŞükrüToday, one of the most polluting manufacturing sectors is the textile industry. Therefore, recycling of these wastes is of great interest. One of the solutions applied for the recycling of these wastes is their use in the manufacture of composites. In this study, optimization of manufacturing parameters was made in order to obtain plates with the highest tensile strength from composite materials to be produced from textile wastes by using Taguchi and ANOVA methods. As a result of the study, it was found that the tensile strength of the composite plates made of polyester fabric was higher than the plates made of cotton fabric, and the signal/noise (S/N) ratios of 0° angle reinforced composites were lower than 90° angle reinforced composites. It was observed that there was a nearly linear increase in the S/N ratios depending on the increase in the number of reinforcements. As a result of the ANOVA analysis, it was found that the most effective factor according to the tensile strength was the reinforcement angle with 45.06%. It was observed that the highest tensile strength of the composite plates obtained from cotton fabric was 40.058 MPa with 90° angled reinforcement elements and 14 reinforcements, and the lowest tensile strength was 23.451 MPa with 0° angled reinforcement elements and 10 reinforcements. In composite plates obtained from polyester fabric, the highest tensile strength was 42.136 MPa with 45° angled reinforcement elements and 14 reinforcements, and the lowest tensile strength was 27.112 MPa with 0° angled reinforcement elements and 10 reinforcement numbers. It has been found that the tensile strength of the composite plates obtained from polyester fabric is higher than that of the composite plates obtained from cotton fabric.
