تولید انرژی از میکروتیرهای نانوکامپوزیتی هوشمند به کمک مواد پیزوالکتریک

نوع مقاله : مقاله پژوهشی

نویسنده

دانشکده مهندسی مکانیک، دانشگاه آیت‌الله بروجردی، بروجرد، ایران

چکیده

این مقاله به مبحث تولید انرژی در تیر تقویت‌شده با نانولوله‌های کربنی هدفمند می‌پردازد. تیر مورد نظر تحت بارگذاری ‌هارمونیک محوری قرار دارد و با یک لایه پیزوالکتریک پوشش داده شده است. تأثیرات اندازه با استفاده از نظریۀ گرادیان کرنش فرض می‌شود. مدول مؤثر یانگ تیر نانوکامپوزیتی با استفاده از قانون اختلاط به دست می‌آید. براساس نظریۀ تئوری سینوسی، روابط نهایی حرکت محاسبه می‌شود. با به‌کارگیری روش‌های تفاضلات مربعی و نیومارک، توان تولیدی و ناحیۀ ناپایداری دینامیکی میکروتیر محاسبه شده است. تأثیرات شرایط مرزی، کسر حجمی و توزیع نانولوله‌های کربنی، اندازه، دما و نسبت طول به ضخامت میکروتیر بر توان تولیدی و منحنی ناحیۀ ناپایداری دینامیکی نشان داده شده‌اند. دستاوردهای عددی نشان می‌دهد ناحیۀ ناپایداری دینامیکی در بسامدهای تشدید بالاتر و با افزایش کسر حجمی نانولوله‌های کربنی رخ داده است. علاوه‌ بر این، توان الکتریکی تولیدشده با افزایش ضخامت لایۀ پیزوالکتریک بیشتر می‌شود.

کلیدواژه‌ها


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