فناوری در مهندسی هوافضا

فناوری در مهندسی هوافضا

تحلیل کمانش ترمومکانیکی میکروصفحه‌های ساندویچی پیزوالکتریک مستطیلی

نوع مقاله : علمی پژوهشی

نویسندگان
1 استادیار، دانشکده هوافضا، دانشگاه علوم و فنون هوایی شهید ستاری، تهران، ایران
2 دانشجوی کارشناسی ارشد، دانشکده هوافضا، دانشگاه علوم و فنون هوایی شهید ستاری، تهران، ایران
چکیده
در این مقاله، رفتار کمانش ترمومکانیکی یک میکروصفحه مستطیلی لانه زنبوری ساندویچی با شرایط تکیه‌گاهی ساده تحت حرارت و ولتاژ اعمالی مورد مطالعه قرار می‌گیرد. مدل مورد مطالعه از دو رویه پیزوالکتریک از جنس تیتانات باریوم و یک هسته لانه زنبوری آلومینیومی تشکیل شده است. برای معادلات جابجایی‌ از تئوری مرتبه بالای تغییرشکل برشی و برای استخراج معادلات حاکم از اصل جابجایی مجازی استفاده شد و معادلات به کمک روش ناویر حل شدند. در این مقاله، هم‌چنین آثار نسبت منظری میکروصفحه، ابعاد طولی، زاویه لایه‌چینی، نسبت ضخامت‌ رویه به هسته و ولتاژ لایه پیزوالکتریک بر روی کمانش ترمومکانیکی میکروصفحه مستطیلی لانه زنبوری ساندویچی مورد مطالعه قرار گرفت و مشاهده شد که با افزایش دما، ولتاژ اعمالی، طول میکروصفحه، ضخامت و زاویه سلول‌های لانه زنبوری، مقدار بار کمانش بحرانی کاهش می‌یابد.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Thermomechanical Buckling Analysis of Rectangular Piezoelectric Sandwich Microplates

نویسندگان English

Mostafa Livani 1
Mohammad Rajae 2
Vahid Khalafi 1
1 Department of Aerospace Engineering, Shahid Sattari Aeronautical University of Science and Technology, Tehran, Iran,
2 Department of Aerospace Engineering, Shahid Sattari Aeronautical University of Science and Technology, Tehran, Iran
چکیده English

This study investigates the thermomechanical buckling behavior of supported sandwich honeycomb rectangular microplates subjected to thermal loading and applied voltage. The structure comprises barium titanate piezoelectric face sheets and an aluminum honeycomb core. A high-order shear deformation theory is employed to formulate the displacement field. The governing equations are derived using the virtual displacement principle and solved via the Navier method. Parametric analysis evaluates the microplate aspect ratio, fiber orientation angle, length, face-to-core thickness ratio, and piezoelectric voltage influence on buckling behavior. Findings indicate that the critical buckling load decreases with increasing temperature, applied voltage, microplate length, thickness, and honeycomb cell angle.

کلیدواژه‌ها English

Buckling
Microplate
Sandwich Structure
Honeycomb
Piezoelectric
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  • تاریخ دریافت 29 آذر 1402
  • تاریخ بازنگری 19 اردیبهشت 1403
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