تحلیل و بررسی اثر چیدمان لایه ها و زوایای الیاف بر رفتار ارتعاشاتی پوسته های استوانه ای FML بر بستر الاستیک پاسترناک با شرایط مرزی مختلف

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه هوافضا، دانشکده مهندسی، دانشگاه فردوسی مشهد، مشهد، ایران

2 دانشیار، دانشکده مهندسی مکانیک، دانشگاه سمنان، سمنان، ایران

3 گروه هوافضا، دانشکده مکانیک، دانشگاه تربیت مدرس، تهران، ایران

4 دانشیار دانشکده مهندسی صنایع، دانشگاه علم و صنعتف تهران، ایران

5 دانشیار دانشکده مکانیک، دانشگاه مالک اشتر، تهران، ایران

چکیده

این مقاله به بررسی اثر چیدمان لایه‌ها و زوایای الیاف بر رفتار ارتعاشاتی پوسته استوانه‌ای[i]FML در نمونه‌هایGLARE[ii]  وARALL[iii]  و بر روی بستر الاستیک پاسترناک با شرایط مرزی مختلف با استفاده از تئوری الاستیسیته سه‌بعدی می‌پردازد (نسبت حجمی کامپوزیت/ فلز ثابت درنظر گرفته شده است). معادلات حاکم با استفاده از اصل کمینه‌سازی انرژی پتانسیل به‌دست می‌آید. جهت اطمینان از دقت و همگرایی نتایج مطالعه حاضر، حل عددی با استفاده از روش المان محدود[iv] (FEM) انجام شده است. نتایج نشان‌دهنده این موضوع است که لایه‌بندی بر رفتار ارتعاشاتی پوسته استوانه‌ای FML تأثیر بسیار زیادی دارد. نتایج با سایر ادبیات دارای مطابقت بسیار خوبی است. استفاده از تئوری الاستیسیته سه‌بعدی همراه با تحلیل نمونه‌های مختلف برای ارتعاشات پوسته‌های FML تقویت‌شده که برای اولین بار در این تحقیق ارائه شده است یکی از مهم‌ترین نوآوری‌های پژوهش حاضر است که می‌توان از این نتایج  به‌عنوان معیاری مناسب جهت تحلیل و بهینه نمودن پوسته‌های FML با هر تعداد لایه‌های فلز و کامپوزیت، هر نوع زاویه قرارگیری الیاف و تحت هر نوع شرایط مرزی استفاده نمود.
 
[i]. Fiber Metal Laminates (FML)
[ii]. Glass Reinforced Aluminum Laminate
[iii]. Aramid Reinforced Aluminum Laminate
[iv]. Finite Element Method (FEM)


 


 

 
 

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Analysis and investigation of the effect of the Lay-up of layers and angles of fibers on the vibration behavior of FML cylindrical shells of on Pasternak elastic foundation with different boundary conditions

نویسندگان [English]

  • morteza khademi-kouhi 1
  • Ahmad Ghasemi Ghale-Bahmanmi Ghale-Bahman 2
  • Amin Farrokh Abadi 3
  • Mohammad Reza Mohammad Aliha 4
  • Mahmoud Jedi 5
1 Department of Aerospace, Faculty of Engineering, Ferdowsi University of mashhad, Mashhad, Iran
2 Associate Professor, Faculty of mechanical engineering,, Semnan university, Semnan, Iran
3 Associate Professor, Department of Aerospace, Tarbiat Modares University, Tehran, Iran
4 Associate Professor, Department of industrial engineering, University of Science and Technology, Tehran, Iran
5 Associate Professor of Mechanical Engineering, Department of Mechanical, Malek Ashtar University of Technology, Tehran, Iran
چکیده [English]

This article examines the effect of layer arrangement and fiber angles on the vibration behavior of cylindrical shell (FML) in GLARE and ARALL samples and on Pasternak elastic bed with different boundary conditions using 3D elasticity theory (composite/metal volume ratio is fixed in taken). The governing equations are obtained using the potential energy minimization principle. In order to ensure the accuracy and convergence of the results of this study, the numerical solution was done using the Finite Element Method (FEM). The results show that the layering has a great influence on the vibration behavior of the FML cylindrical shell. The results are in good agreement with other literature. The use of three-dimensional elasticity theory along with the analysis of different samples for the vibrations of reinforced FML shells, which is presented for the first time in this research, is one of the most important innovations of the current research, and these results can be used as a suitable criterion for analyzing and optimizing FML shells. It can be used with any number of metal and composite layers, any fiber placement angle and under any boundary conditions.

کلیدواژه‌ها [English]

  • fiber metal laminated (FML)
  • cylindrical shell
  • elastic Foundation
  • Lay-up of layers
  • fiber angles

مراجع

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