علوم و فناوری کامپوزیت

تحلیل پارامتری ضربه بر روی پوسته های استوانه‌ای ساندویچی با رویه FML و هسته‌ مدرج تابعی با استفاده از یک تئوری پوسته جدید

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشیار،مجتمع دانشگاهی مواد و فناوریهای ساخت،دانشگاه صنعتی مالک اشتر، تهران

2 دانشجوی دکتری،مجتمع دانشگاهی موادوفناوریهای ساخت،دانشگاه صنعتی مالک اشتر، تهران.

3 دانشیار،مجتمع دانشگاهی موادوفناوریهای ساخت،دانشگاه صنعتی مالک اشتر، تهران

4 استاد،مجتمع دانشگاهی مواد وفناوریهای ساخت،دانشگاه صنعتی مالک اشتر، تهران.

چکیده

در مقاله حاضر به تحلیل پارامتری ضربه بر روی پوسته های استوانه‌ای ساندویچی با رویه FML و هسته‌ مدرج تابعی با استفاده از یک تئوری پوسته جدید پرداخته شده است. در این پژوهش دو مدل جدید، ساده و مهندسی برای پیش‌گویی تاریخچه نیروی تماس ناشی از برخورد عرضی شبه استاتیکی توسط ضربه‌زننده الاستیک و ایزوتروپیک به شکل کره، با سرعت پایین به پوسته استوانه‌ای کامپوزیتی ارائه شده است. این دو مدل عبارتند از: مدل نیم سینوسی (یا H-S) و مدل جرم و فنر بهبود یافته با دو درجه آزادی (یا IS-M). در مدل H-S حداکثر نیروی تماس و مدت زمان تماس به روش تحلیلی استخراج شده‌اند. در مدل IS-M ، ابتدا جرم و سفتی مؤثر پوسته در محل تماس به روش تحلیلی محاسبه شده، سپس با استفاده از روش تکرار و رسیدن به همگرایی، سفتی تماس اصلاح شده به دست آمده است. اعتبارسنجی نتایج پژوهش حاضر با مقایسه با نتایج تئوری و تجربی سایر محقّقین و نتایج حاصل از نرم‌افزار ABAQUS صورت پذیرفته و تطابق خوبی حاصل شده است. نتایج نشان می‌دهند که هر چه اثر عبارت‌های (z/R + 1) دقیق‌تر محاسبه شوند، دقت محاسبه پاسخ ضربه افزایش می‌یابد. همچنین، نتایج عددی نشان می‌دهند که برخی پارامترها از جمله ساختار، جنس و زاویه لایه‌ها و کسر حجمی فلز (MVF) و نسبت ضخامت هسته به ضخامت کل پوسته در پوسته‌های ساندویچی FML/Core/FML با هسته FGM، اثر قابل ملاحظه‌ای بر روی پاسخ ضربه این پوسته‌ها می‌گذارند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Parametric impact analysis on cylindrical sandwich shells with FML face and functionally graded core using a new shell theory

نویسندگان [English]

  • Ali Davar 1
  • Mohsen Heydari Beni 2
  • Reza Azarafza 3
  • Jafar Eskandari Jam 4

1 Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran.

2 Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran.

3 Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran.

4 Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran.

چکیده [English]

In this paper, the parametric analysis of the impact on cylindrical sandwich shells with the FML face sheet and functionally graded core using a new shell theory is discussed. In this research, two new, simple and engineering models have been presented to predict the history of the contact force caused by a quasi-static transverse impact by an elastic and isotropic impactor in the shape of a sphere, with a low speed, to a composite cylindrical shell. These two models are the half-sine model (or H-S) and the improved mass and spring model with two degrees of freedom (or IS-M). In the H-S model, the maximum contact force and contact duration have been extracted analytically. In the IS-M model, first the mass and the effective stiffness of the shell at the contact point are calculated analytically, then using the successive method and reaching convergence, the modified contact stiffness is obtained. Validation of the present research results was done by comparing the theoretical and experimental results of other researchers and the results of the ABAQUS software, and a good match has been achieved. The results show that the more accurately the effect of (z/R + 1) terms are calculated, the higher the accuracy of estimating the impact response.

کلیدواژه‌ها [English]

  • Composite cylindrical shells
  • Low-velocity transverse impact
  • Modified Higher-order theory
  • Impact model
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علوم و فناوری کامپوزیت
دوره 9، شماره 4
اسفند 1401
صفحه 2099-2115
فایل ها
هم رسانی
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