مطالعه‌ای بر رفتار ساختارهای ساندویچی با هسته لانه‌زنبوری تحت بارگذاری دفعی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری رشته مهندسی مکانیک جامدات

2 عضو هیات علمی دانشگاه یزد

3 استادیار گروه مهندسی مکانیک دانشگاه ایوان کی

چکیده

ساختارهای ساندویچی یکی از اهداف مورد استفاده برای کاهش خسارت‌ها است. در این مقاله، اثر شرایط مختلف بارگذاری و همچنین هندسه ساختار بر رفتار ساختار ساندویچی تحت بارگذاری دفعی یکنواخت مورد مطالعه قرارگرفته است. بنابراین، در ابتدا یک مدل عددی با استفاده از نرم‌افزار آباکوس، جهت شبیه‌سازی پاسخ دینامیکی و تغییر شکل پلاستیک سازه‌های ساندویچی ساخته شده است. جهت صحت‌سنجی مدل عددی از داده‌های تجربی موجود در ادبیات تحقیق استفاده شد. سپس در بحث مطالعه پارامتریک، تأثیر پارامترهای مؤثر بر مقاومت این ساختار ساندویچی نظیر ضخامت صفحات بالا و پایین فلزی، تعداد صفحات در هسته و همچنین ضخامت آنها تحت بارگذاری دفعی با جرم خرج‌های مختلف 0/5 ،1 و 1/5 کیلوگرم مورد بررسی قرار گرفته است. در ادامه با استفاده از طراحی آزمایش به روش سطح پاسخ، مدلی مناسب جهت پیش‌بینی میزان تغییر شکل مرکزی صفحات بالا و پایین ساختار ساندویچی توسعه داده شده است. نتایج به دست آمده نشان‌دهنده مطابقت بسیار خوب داده‌های تجربی و داده‌های پیش‌بینی شده توسط مدل رگرسیونی است. مقدار بالای ضریب همبستگی بین پارامترهای مورد مطالعه و رفتار سازه حاکی از آن است که مدل ارائه شده از دقت بسیار بالایی برخوردار بوده است. حالت بهینه این ساختار ساندویچی در محدوده مورد بررسی، با همین مدل رگرسیونی به دست آمده است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Study on Performance of Sandwich Panel Structures with Honeycomb Core Subjected to Impulsive Loading

نویسندگان [English]

  • Mostafa Sayah Badkhor 1
  • Mahdi Hasanzadeh 2
  • Tohid Mirzababaie Mostofi 3
1 Faculty of Engineering, Department of Mechanical Engineering, Eyvanekey University
2 Faculty Member of Yazd University
3 Faculty of Engineering, Mechanical Engineering Department, University of Eyvanekey
چکیده [English]

In this paper, the effect of differed loading conditions, as well as structure geometries on the behavior of sandwich panel structures under uniform impulsive loading, has been investigated. For this, a full 3-Dimensional numerical model by using ABAQUS/Explicit commercial software was employed in order to simulate the dynamic response and plastic deformation of sandwich panel structures with a honeycomb core. The available experimental results were used to validate the numerical model. Afterward, in a rigorous parametric study, the influences of several effective parameters on the resistance of structure such as the front and back metallic layer thicknesses, the number of webs, and thickness of honeycomb core cell wall under three different mass weights of 0.5, 1 and 1.5 kg were studied. In the following, by using response surface methodology, an appropriate equation was developed to predict the central permanent deflection of back and front layers. The obtained results showed that there is a well-agreement between experimental and numerical results predicted by the regression model. The high correlation coefficient between the studied parameters and the structure behavior (R2 = 0.99) indicates that the proposed model has great accuracy.

کلیدواژه‌ها [English]

  • mpulsive
  • panels sandwich Metallic
  • simulation Numerical
  • .methodology surface
  • Respon

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نشریه مهندسی مکانیک امیرکبیر
دوره 52، شماره 10
دی 1399
صفحه 2823-2838

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