Effect of geometrical parameters on natural frequencies of sandwich beam with composite faces reinforced with FG-CNT and two types of stiff and flexible core
Author(s):
Message:
Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:
In this article, the vibrational behavior of sandwich beams with stiff and flexible core and face sheets reinforced with carbon nanotubes has been investigated. Carbon nanotubes are used as materials that their properties change along the thickness. In this research for modelling the sandwich beam an extended high order sandwich theory is used. In order to model the behavior of faces the Timoshenko beam’s theory is employed and also for modeling the behavior of the core, three-degree displacement field is used considering the axial stresses and also compatibility conditions of the core. The equations of motion are derived using the variations of energy and the Ritz method is used to solve the equations of motion. The obtained results are compared with available results that show the high accuracy of the present modelling. The results for different distributions of carbon nanotubes and different boundary conditions have been investigated. In this research new results are presented for different boundary conditions in terms of different length to thickness ratio. One of the important result of this research is that, generally it cannot be say that what distribution of CNT leads to maximum or minimum natural frequency of the structure and this problem is strongly depended on the length to thickness ratio of the bam and also stiffness or flexibility of the core.
Language:
Persian
Published:
Iranian Journal of Mechanical Engineering, Volume:21 Issue: 3, 2019
Pages:
101 to 137
magiran.com/p2086421  
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یک‌ساله به مبلغ 990,000ريال می‌توانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
  • حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران می‌شود.
  • پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانه‌های چاپی و دیجیتال را به کاربر نمی‌دهد.
دسترسی سراسری کاربران دانشگاه پیام نور!
اعضای هیئت علمی و دانشجویان دانشگاه پیام نور در سراسر کشور، در صورت ثبت نام با ایمیل دانشگاهی، تا پایان فروردین ماه 1403 به مقالات سایت دسترسی خواهند داشت!
In order to view content subscription is required

Personal subscription
Subscribe magiran.com for 50 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!