تحلیل ارتعاشات آزاد صفحه ساندویچ پانل با رویه هیبرید فلز/کامپوزیت و هسته انعطاف‌پذیر با استفاده از تئوری مرتبه سوم برشی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی مکانیک، دانشگاه سمنان، سمنان، ایران

2 گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه دامغان، دامغان، ایران

چکیده

در این مقاله ارتعاشات آزاد ورق ساندویچی با رویه هیبرید فلز/کامپوزیت تقویت‌شده با الیاف کربن و شیشه و هسته نرم دارای تکیه‌گاه ساده مورد بررسی قرار گرفته­ است. برای استخراج معادلات حاکم، از تئوری مرتبه بالای چندلایه و اصل همیلتون برای ورق ساندویچی مستطیلی با رویه هیبرید فلز/کامپوزیت و با فرض اتصال کامل رویه به هسته نرم و همچنین با فرض جابه­جایی خطی استفاده شده است. پس از مقایسه و تصدیق نتایج تحقیق حاضر با نتایج تحقیقات مشابه موجود و اطمینان از صحت معادلات استخراج‌شده، اثرات حجم مؤثر لایه فلز و کامپوزیت با لایه­چینی زاویه­ای، پارامترهای هندسی نسبت طول به ضخامت و ضخامت هسته به رویه، طول به عرض و لایه‌چینی (90و0) و (45و45-) برای دو جنس الیاف شیشه و کربن هیبریدشده با آلومینیوم AL 2024 T3 مورد بررسی قرار گرفت. نتایج ارتعاشات آزاد نشان داد، هیبرید کربن/آلومینیوم در نسبت حجم مؤثر کامپوزیت (Vc) برابر با 5/0، بیشترین مقدار فرکانس طبیعی را در لایه‌چینی AL/-45/45/core/45/-45/AL در پنج مود اول داشته است و همچنین با افزایش ضخامت هسته به رویه و نسبت طول به ضخامت کل، اثر لایه آلومینیوم کاهش می­یابد.
 

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Free vibration analysis of sandwich panel plate with FML face sheet and flexible core using third-order shear deformation theory

نویسندگان [English]

  • Mohammad Heravi 1
  • Mohammad Mahdi Khatibi 1
  • Alireza Albooyeh 2
1 School of Mechanical Engineering, Semnan University
2 Mechanical Engineering,, Damghan University, Damghan, Iran
چکیده [English]

This paper investigates the free vibrations of a sandwich panel with metal/composite hybrid face sheets reinforced with carbon and glass fibers and a soft core with simply-support boundary conditions. To derive the governing equations, with third shear deformation theory (TSDT) of multilayers and Hamilton's principle have been used for a rectangular sandwich panel with a metal/composite hybrid top and bottom face sheets. It is assumed full connection of the face sheets to the softcore and linear displacement. After comparing the results of the present research with similar and ensuring the correctness of the extracted equations, the parameters effective, volume fraction metal layer and composite with angular layering, the ratio of length to thickness and thickness of the core to the face sheet, length sandwich panel to width and the layup (0,90) and (45, -45) for two types of glass and carbon fibers hybridized with AL 2024 T3 aluminium investigated. The results showed that the carbon/aluminium hybrid with the volume of the composite (Vc) equal to 0.5 has the highest natural frequency value in the first five mode shapes with layup AL/-45/45/core/45/-45/AL. Also, by increasing the thickness of the softcore to the surface and the ratio of length sandwich panel to total thickness, the effect of the aluminium layer decreases.

کلیدواژه‌ها [English]

  • Sandwich Panel
  • Metal/Composite Hybrid (FML)
  • Third-Order Shear Deformation Theory
  • Angle-ply Laminate
  • Volume Fraction Laminate
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