نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، مهندسی مکانیک، دانشگاه صنعتی امیرکبیر، تهران، ایران

2 استاد، مهندسی مکانیک، دانشگاه صنعتی امیرکبیر، تهران، ایران

3 استادیار، مهندسی مکانیک، پژوهشگاه پلیمر و پتروشیمی ایران، تهران، ایران

چکیده

سازه‌های ساندویچی به طور گسترده در صنایع مختلفی از جمله صنایع هوا فضا، کشتی سازی، ساخت ناوگان ریلی و غیره کاربرد دارند. این سازه‌ها عموما در ابعاد محدود ساخته شده و با استفاده از اتصالات فلزی، چسب و یا پیچ به یکدیگر متصل می‌گردند. در مقاله حاضر، دو نوع اتصال فلزی با جنس یکسان و هندسه متفاوت بین سازه‌های ساندویچی با رویه‌های کامپوزیت اپوکسی- شیشه و هسته لانه زنبوری آلومینیومی درنظر گرفته شده است که این اتصالات با چسب به سازه ساندویچی متصل گردیده‌اند. پس از ساخت نمونه‌ها، آزمون‌های خمش سه نقطه بر روی تیر و خمش ورق بر روی نمونه‌ها انجام شدند. بعلاوه به منظور شبیه سازی رفتار سازه‌های ساندویچی دارای اتصال، مدلسازی نمونه‌ها با استفاده از یک نرم افزار بر پایه روش المان محدود صورت پذیرفت. با تکیه بر مقایسه نتایج عددی و تجربی، صحه گذاری نتایج شبیه سازی نرم افزاری انجام گرفت و تطابق مناسبی بین نتایج حاصل از کار عددی با نتایج تجربی مشاهده گردید. سپس برای هر دو اتصال، تاثیر افزایش طول و ضخامت بر حداکثر نیرو و جذب انرژی از طریق تحلیل پارامتری با استفاده از مدل المان محدود بدست آمده، مورد بررسی قرار گرفت.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Experimental and numerical investigation of sandwich panels with bilateral connection under static loading

نویسندگان [English]

  • shidokht rashiddadash 1
  • Mojtaba Sadighi 2
  • Soheil Dariushi 3

1 - Mechanical Engineering Department, Amirkabir University of technology, Tehran, Iran

2 Mechanical Engineering Department, Amirkabir University of technology, Tehran, Iran

3 Composite group, Iran Polymer and Petrochemical Institute, Tehran, Iran

چکیده [English]

Sandwich structures are used in applications that required a combination of high rigidity and low weight same as aerospace, marine and automotive. Large and/or complicated sandwich structures are often manufactured by connecting pre-fabricated sandwich panels by means of connections, adhesive or bolts. In present study, two types of metallic connections were used to join two sandwich panels with glass-epoxy face-sheets and aluminum honeycomb core. Connections have the same material and different geometries and were bonded to the sandwich structures using the same epoxy as used to manufacture the face-sheets. Two groups of specimens were made and tested under bending loading. Also, a finite element simulation using LS-DYNA were performed to predict the behavior of sandwich structures. A good compliance between numerical and experimental results was observed. The effects of increasing the length and the thickness of the connections on the maximum force and energy absorption were investigated to examine the influences of involved parameters on bending response of a sandwich plates.

کلیدواژه‌ها [English]

  • sandwich panel
  • connection
  • Honeycomb
  • static tests

 

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