نویسندگان
دانشگاه آزاد اسلامی، واحد مشهد
چکیده
در این مقاله، رفتار کمانش صفحات کامپوزیتی تقویت شده با چیدمان‌های گوناگون توزیع تابعی نانولوله‌های کربنی در راستای ضخامت صفحه مورد بررسی قرار گرفته است. کلیه معادلات حاکم به‌صورت نموی و براساس تئوری برشی مرتبه اول صفحات و کرنش‌های غیرخطی فون‌کارمن به‌دست آمده است. به‌منظور تعیین بار بحرانی کمانش، بار محوری به‌صورت نموی به صفحه اعمال می‌گردد و دستگاه معادلات تعادل به کمک روش آزادسازی دینامیکی برای به‌دست آوردن بار بحرانی کمانش حل می‌شود. مطالعه پارامتری برروی اثرات کسر حجمی نانولوله‌ها، نوع چیدمان نانولوله‌ها، نسبت عرض به ضخامت و نسبت‌های ابعادی صفحه نانوکامپوزیتی انجام شده است. نتایج بیانگر این است که استفاده از توزیع تابعی به‌طور قابل‌توجهی باعث افزایش بار بحرانی کمانش می‌شود.
کلیدواژه‌ها
عنوان مقاله [English]
Buckling Analysis of Functionally Graded Carbon Nanotube-reinforced Composite Plates using Incremental Loading and Dynamic Relaxation Methods
نویسندگان [English]
- M. E. Golmakani
- V. Zeighami
چکیده [English]
In this paper, buckling behavior of functionally graded carbon nanotube-reinforced composite (FG-CNTRC) plates is studied in line with the plates thikness. All governing equations are presented incrementally, based on a First-order Shear Deformation Theory (FSDT) of plates and von Karman strain field. In order to find the critical buckling load, the axial load is applied to the plate incrementally and the equilibrium equations are solved by Dynamic Relaxation (DR) method. Parametric study of the effects of volume fraction of Carbon Nanotubes (CNTs), CNTs distribution, plate width-to-thickness ratio and aspect ratio of nano composite plates is done in detail. The results show that functionally graded distribution of CNTs causes a significant increase of critical buckling load.
کلیدواژه‌ها [English]
- Buckling
- nano composite plates
- carbon nanotubes
- dynamic relaxation method
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