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Document Type |
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Thesis |
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Document Title |
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EXPERIMENTAL ANALYSIS OF THERMAL DAMAGE IN DRILLING CARBON-FIBER REINFORCED EPOXY COMPOSITE MATERIALS تحليل تجريبي للأضرار الحرارية الناتجة عن ثقب المواد المركبةمن الايبوكسي المقوى بألياف الكربون |
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Subject |
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faculty of Engineering |
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Document Language |
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Arabic |
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Abstract |
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In this study, the influence of spindle speed (535, 1070, 2160 & 3030 rpm), feed (0.1, 0.2 & 0.3 mm/r) and composite thickness (5 & 10 mm) on induced temperature, thrust force, torque and delamination factor in drilling carbon-fiber reinforced epoxy (CFRE) composite materials was investigated. Two-flute cemented carbide twist drill of 6 mm diameter was used to drill the specimens. Thrust force and torque values were measured using a dynamometer, and the induced temperature during the drilling process was measured using thermocouples and thermal camera. The results showed that, the thrust force values increased with increasing the spindle speed, the feed and the composite thickness. The torque values decreased with increasing the spindle speed, while the torque values increased with increasing the feed and the composite thickness. The temperature values increase with increasing the spindle speed and the composite thickness, while the temperature values decreased with increasing the feed. The critical thrust force at the last five uncut layers was predicted using analytical models. The delamination size was evaluated using Ultrasonic C-Scan inspection and expressed as delamination factor. For the investigated feed values, the delamination factor increases as the feed increased. Drilling of CFRE composites of 5 mm thickness at 2160 rpm result in lower push-out delamination factor. Whereas, drilling of CFRE of 10 mm thickness at 535 rpm result in lower push-out delamination factor. The specimens of 10 mm thickness showed higher measurements values of thrust force, torque, temperature and delamination factor comparing with the specimens of 5 mm thickness. |
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Supervisor |
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Prof. Usama Khashaba |
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Thesis Type |
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Master Thesis |
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Publishing Year |
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1441 AH
2020 AD |
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Co-Supervisor |
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Dr. Muhammad Basha |
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Added Date |
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Monday, January 20, 2020 |
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Researchers
| فيصل خالد باعقيل | Baakeel, Faisal Khalid | Researcher | Master | |
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