بررسی اثر جهت الیاف بر خواص مکانیکی پرههای توربین بادی کامپوزیتی
محورهای موضوعی : فصلنامه علمی - پژوهشی مواد نوین
محسن معتمدی
1
,
عرفان نصر آزادانی
2
1 - دانشکده مهندسی مکانیک، دانشگاه اصفهان، پردیس شهرضا، اصفهان، ایران
2 - گروه مهندسی مکانیک، دانشکده مهندسی، دانشگاه اصفهان، پردیس شهرضا، ایران
کلید واژه: کامپوزیت پایهپلیمر , فایبرگلاس, استحکامکششی, ضریب تمرکزتنش, طراحی آزمایشات, بهینه سازی.,
چکیده مقاله :
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در سالهای اخیر مطالعات بر روی کامپوزیتها به شدت افزایش پیدا کرده و به دلیل توسعه بیشترکامپوزیتهای پایهپلیمری نسبت به کامپوزیتهای پایهفلزی و سرامیکی اکثر مطالعات انجام شده بر روی این نوع از کامپوزیتها انجام شده است. این کامپوزیت به دلیل خواص فوقالعاده استفاده بسیار گستردهای درانواع صنایع دارد. یکی از موارد استفاده این کامپوزیت در صنایع ساخت توربین بادی بوده که پرههای توربین بادی و حتی در برخی موارد پایه و بدنه توربین هم از این کامپوزیت ساخته شدهاند؛ اما با توجه به اینکه شبیهسازی و تحلیل توربین بادی کامپوزیتی به دلیل هندسه پیچیده و خاص میتواند مشکل و پرهزینه باشد.در این پژوهش به بررسی تاثیر تغییر زاویه الیاف ورق کامپوزیتی پایهپلیمری دو لایه پرداخته شد و خواص مکانیکی این کامپوزیت اعم از مدول یانگ (استحکام کششی) در دو راستای طول و عرض ورق و ضریب تمرکزتنش در بهینهترین حالت ممکن محاسبه شد. محدوده تغییرات زوایای دو لایه شیشه بین 0 تا 90 و 90- تا 0 بود که در نهایت زاوایای بهینه مقدار°5/63 و°5/36- بهدست آمدند. همچنین مقادیر مدول یانگ در دو راستای ورق (E_x .E_y ) به ترتیب 17.7 گیگاپاسکال و 20.46 گیگاپاسکال بهدست آمدند. به همین صورت مقدار ضریب تمرکز تنش(K) برای این ورق کامپوزیتی 745/2 بهدست آمد. |
In recent years, studies on composites have significantly increased, with a focus on polymer-based composites rather than metal and ceramic-based composites. These composites have found extensive use across various industries due to their exceptional properties. One notable application is in the construction of wind turbine blades, where both the blades and sometimes the main body of the turbine are made from these composites. However, simulating and analyzing composite wind turbines can be challenging and costly due to their complex and unique geometry.
In this research, the effect of changing the angle of fibers in a five-layer polymer-based composite sheet with three layers of epoxy resin and two layers of fiberglass was investigated. The mechanical properties of this composite, including Young's modulus in both length (Ex) and width (Ey) directions of the sheet, as well as the stress concentration factor in the optimal configuration, were calculated.Ultimately resulting in optimal angles of 36/5° and -36/5°, respectively. The Young's modulus values in the two directions of the sheet were found to be 20/46 GPa and 17/7 GPa, respectively. Similarly, the stress concentration factor (K) for this composite sheet was determined to be 2/745.
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