نشریه مهندسی مکانیک ایران

نشریه مهندسی مکانیک ایران

تحلیل آیزوژئومتریک ارتعاشات آزاد تیرهای کامپوزیتی تقویت شده با صفحات گرافن بر اساس یک تئوری شبه سه بعدی بهبود یافته

نوع مقاله : مقاله علمی پژوهشی

نویسنده
استادیار، گروه مهندسی مکانیک، واحد لامرد، دانشگاه آزاد اسلامی، لامرد، ایران
چکیده
در این مقاله، بر مبنای یک تئوری تیر شبه سه بعدی بهبود یافته و استفاده از روش آیزوژئومتریک، ارتعاشات آزاد تیرهای کامپوزیتی تقویت شده با صفحات گرافن مطالعه شده است. تیر مورد بررسی به صورت لایه ‌ای فرض شده که کسر حجمی گرافن در این لایه ‌ها می ‌تواند متفاوت باشد و منجر به یک سازه هدفمند تابعی شود. مدول الاستیسیته معادل این تیرها به کمک مدل هالپین-سای محاسبه شده است. ابتدا در قالب چندین مثال، دقت فرمول‌ بندی پیشنهادی بررسی گردیده است. نتایج نشان می ‌دهد که تئوری اتخاذ شده به خوبی می ‌تواند رفتار ارتعاشات آزاد تیرهای نانوکامپوزیتی با ضخامت دلخواه را پیش ‌بینی کند.
کلیدواژه‌ها

موضوعات


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  • تاریخ دریافت 13 بهمن 1402
  • تاریخ بازنگری 19 فروردین 1403
  • تاریخ پذیرش 29 فروردین 1403