IJE TRANSACTIONS C: Aspects Vol. 30, No. 12 (December 2017) 1894-1902    Article in Press

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A. Khalkhali and S. Daghighi
( Received: June 30, 2017 – Accepted in Revised Form: September 08, 2017 )

Abstract    Due to significant environmental advantages, biocomposites have recently received increasing attention. In the present research, strength of hat-shaped coir fiber biocomposites tubes reinforced with nano powder was evaluated experimentally under 3-point bending tests. The tubes were manufactured using hand lay-up technique and based on Taguchi design of experiment. The effects of different parameters including fiber loading, type of nano powder and its weight percentage and also weight percentage of NaOH in alkali treatment were analyzed. Optimization was also performed using Taguchi L8 orthogonal array. Moreover, analysis of variance (ANOVA) was conducted to determine the significance of the parameters. In this study, finite element model was also created in ABAQUS software to compare with the results obtained from the experiments to achieve validated finite element model. There was a good agreement between the results from experiments and those obtained in numerical simulations.


Keywords    Coir fiber, Biocomposites, Nano Silica, Nano Clay, Taguchi, 3-point bending test


چکیده    اخیرا استفاده از مواد بیوکامپوزیت به دلیل مزایای فراوان زیست­محیطی ، مورد توجه بسیاری از محققان قرار گرفته­است. در این بررسی، استحکام تیوب کلاهی­ شکل از جنس بیوکامپوزیت الیاف نارگیل تقویت شده با نانوپودر مورد ارزیابی تجربی تحت تست خمش 3 نقطه قرار گرفته­است. تیوب با استفاده از تکنیک لایه­چینی دستی و با توجه به طراحی آزمایش به روش تاگوچی ساخته شده­است. تاثیر پارامترهای متفاوت شامل حجم الیاف، نوع نانوپودر و درصد وزنی آن و همچنین درصد وزنی NaOH در فرآیند بهبود قلیایی الیاف مورد بررسی قرار­ گرفت. بهینه­سازی با استفاده از تاگوچی انجام شد. همچنین آنالیز واریانس به منظور تعیین اهمیت هر یک از پارامترها صورت گرفت. در این بررسی، مدل اجزامحدود به منظور حل عددی مسئله در نرم­افزار آباکوس، مدل­سازی شد و نتایج آن با نتایج حاصل از تست تجربی با هدف دستیابی به مدل عددی قابل اطمینان، مقایسه گردید و مطابقت خوبی بین نتایج تجربی و نتایج تئوری به­دست آمد.


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