IJE TRANSACTIONS A: Basics Vol. 26, No. 1 (January 2013) 1-12   

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E. C. Okafor, C. C. Ihueze and S. C. Nwigbo
( Received: July 15, 2012 – Accepted: November 15, 2012 )

Abstract    Volume fraction of fibres (A), aspect ratio of fibres (B) and fibres orientation (C) are considered as control factors in the determination of hardness strength, hardness strength of plantain fiber reinforced polyester composites (PFR P). These properties were determined for plantain empty fruit bunch (PEFB) and plantain pseudo stem (PPS). Hardness tests were conducted on the replicated samples of PEFB fiber reinforced polyester composite and PPS fiber reinforced polyester respectively using Archimedes principles in each case to determine the volume fraction of fibers. To obtain the optimum properties being investigated a Monsanto tensometer were used to establish the control factor levels quality characteristics needed to optimize the mechanical properties being investigated. Taguchi robust design technique was applied for the greater the better to obtain the highest signal to noise ratio (SN ratio) for the quality characteristics being investigated employing Minitab 15 software. The optimum values of the control factors are established for empty fruit bunch composites and for pseudo stem fiber composite. The empty fruit bunch fiber reinforced polyester matrix composite has the maximum hardness strength of 19.062N/mm2 and a mean design strength of 17.978N/mm2, while the pseudo stem plantain fiber reinforced matrix composite has the maximum hardness strength of 18.655 N/mm2 and a mean design strength of 18.0385N/mm2. The properties studied depend greatly on the reinforcement combinations of control factors.


Keywords    composite matrix, plantain fiber, Robust design, Hardness strength, Taguchi



کسر حجمی از الیاف (A)، نسبتي از الیاف (B) و جهت گیری الیاف (C) به عنوان عوامل کنترل كننده در تعیین سختی فیبر درخت موز و مواد تقویت شده مرکب پلی استر (PFR P) در نظر گرفته شده است. این خواص براي يك شاخه خالی از میوه درخت موز (PEFB) و يك شبه ساقه موز (قسمتي از تنه درخت)(PPS) تعیین شده است. آزمون‌های سختی بر روی نمونه‌های فیبر PEFB تکرار شده است و کامپوزیت تقویت شده پلی استر و الیاف PPS تقویت شده پلی استر به ترتیب برای تعیین کسر حجمی از الیاف، از اصول ارشمیدس در هر نمونه مورد استفاده قرار گرفته است. برای به دست آوردن بهترين و بالاترین سیگنال به نسبت نویز (نسبت SN) و براي تعيين خصوصيات كيفي از روش طراحی تاگوچی استفاده شده است. شاخه خالی از میوه به همراه ماتریس کامپوزیت فیبر تقویت شده پلی استر، دارای حداکثر قدرت سختی 19.062 نيوتن بر ميلي‌متر مربع مي باشد و متوسط سختي طراحی شده برابر است با 17.978 نيوتن بر ميلي متر مربع، در حالی که شبه ساقه موز تقویت شده با فیبر ماتریس کامپوزیت دارای حداکثر قدرت سختی 18.655 نيوتن بر ميلي‌متر مربع بوده و متوسط سختي طراحی شده برابر است با 18.0385 نيوتن بر ميلي‌متر مربع. خواص مورد مطالعه تا حد زیادی در ترکیب عوامل کنترل كننده تقویت بستگی دارند


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