نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، دانشکده مکانیک و انرژی، دانشگاه شهید بهشتی ، تهرا ن

2 استاد مهندسی پلیمر، پژوهشگاه پتروشیمی و پلیمر ایران ، تهران

3 استادیار، دانشکده فنی و مهندسی میانه، دانشگاه تبریز، تبریز

10.22068/jstc.2020.112864.1582

چکیده

نانو کامپوزیت های دوفازی پایه پلی آمید 6 / لاستیک آکریلونیتریل بوتادین تقویت شده با نانو ذرات خاک رس کاربردهای وسیعی در صنایع مختلف پیدا نموده اند. نظر به اینکه فرایند اصطکاکی و اغتشاشی یکی از روش‌های تولید نانو کامپوزیت ها می باشد، در این مقاله با استفاده از روش پاسخ سطح تاثیر پارامترهای سرعت دورانی، سرعت پیشروی و دمای شولدر بر استحکام کششی و ضربه این مواد بررسی گردید. ابتدا با چند آزمایش محدوده پارامترها مشخص شد و با استفاده از جدول آنالیز واریانس، تاثیر پارامترها و مدل‌های ریاضی مورد بررسی قرار گرفت. مقایسه نتایج روش سطح پاسخ با نتایج تجربی نشان داد که نتایج بدست آمده از درصد خطای کمی برخوردار است. سپس با استفاده از مدل ریاضی تاثیر پارامترهای مذکور بر استحکام کششی و ضربه بررسی شد تا شرایط بهینه بدست آورده شود. نتایج نشان داد با افزایش سرعت دورانی استحکام کششی و استحکام ضربه افزایش می‌یابد. با افزایش سرعت پیشروی استحکام کششی و استحکام ضربه کاهش می یابد. همچنین بهینه هم زمان پارامترهای ورودی جهت بیشینه نمودن پاسخ های خروجی منجر به استحکام کششی 31.3 مگا پاسکال و استحکام ضربه 70.7 ژول بر متر شد که در سرعت دورانی1200 دور بر دقیقه، سرعت پیشروی 20 میلی متر بر دقیقه ، دمای شولدر 125 درجه سانتی گراد بدست آمد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Mathematical modeling of mechanical properties of PA6/NBR/Clay Nanocomposites Fabrication using the Thermal Friction Stirs Processing

نویسندگان [English]

  • Mohammad Reza Nakhaei 1
  • Ghasem Naderi 2
  • Ali Ebrahimpour 3

1 Facility of Mechanics and Energy, Shahid Beheshti University, Tehran, Iran

2 Iran Polymer and Petrochemical Department of Polymer Engineering. Polymer and Petrochemical Institute, Tehran, Iran

3 Mianeh Technical and engineering Faculty, University of Tabriz, Tabriz, Iran

چکیده [English]

Two phases nanocomposite based polyamide 6/nitrile butadiene rubber reinforced by nano clay has gained wide application in various industries. Since friction stir processing is one of the fabricating methods for nanocomposites, in this paper, the response surface methodology (RSM) was used to investigate the effect of rotational speed, traverse speed and shoulder temperature on the tensile and impact strength. At first, a number of trail runs were performed in order to determine the limits of the process parameters. Analysis of variance was used to investigate the process parameters and mathematical models. Comparison of the results of these methods with experimental results indicated that RSM results had a lower percentage of error. Using a mathematical model, the effect of the mentioned parameters on tensile and impact strength was investigated to obtain optimum conditions. Results indicated that with an increase in rotational speed tensile strength and impact strength increased. With increase in traverse speed, tensile strength and impact strength decreased. Simultaneous optimization of the input parameters for maximization of the output responses led to a tensile strength of 31.3MPa and impact strength of 70.3 j/m was achieved at the rotational speed of 1200 rpm, traverse speed of 20 mm/min and shoulder temperature of 125 °C.

کلیدواژه‌ها [English]

  • Two-phase nanocomposite
  • Polyamide 6/Elastomer
  • Response surface methodology
  • Tensile strength
  • Impact strength
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