نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسیارشد مهندسی عمران- سازه، دانشگاه یاسوج، یاسو ج

2 دانشیار مهندسی عمران، دانشگاه یاسوج، یاسو ج

3 دانشیار مهندسی مکانیک، دانشگاه یاسوج، یاسو ج

10.22068/jstc.2020.117153.1606

چکیده

ریزتورینه‌ها به علت هندسه‌ی هوشمندانه ی خود، عموماً نسبت استحکام به وزن و جذب انرژی بالاتری نسبت به دیگر مواد متخلخل دارند. لذا امروزه تلاش هایی اساسی برای مطالعه‌ی رفتار مکانیکی ساختارهای ساندویچی با هسته‌ی مواد ریزتورینه در حال انجام است که در اغلب آنها، سازه‌های ساندویچی مورد بررسی، مسطح می‌باشند. ساختار‌ ساندویچی انحنادار با هسته‌ی ریزتورینه، به دلیل هندسه‌ی منحنی‌شکل و مزیت‌های بارز ریزتورینه، دستیابی به ساختاری با مقاومت و کارایی بالا را ممکن می‌سازد. در پژوهش حاضر، ریزتورینه‌ها‌ی ساندویچی مسطح و منحنی‌شکل، تحت بار عرضی به کمک نرم‌افزار آباکوس شبیه‌سازی و تحلیل شده‌اند. نتایج تحلیل برای یک سلول واحد با نتایج تحقیقات گذشته مقایسه شده و کارایی و دقت مدل‌سازی تأیید شده است. مدل‌های مورد مطالعه، دارای مقادیر مختلف انحنا و ضخامت رویه‌ می‌باشند. نتایج این تحقیق نشان می‌دهد با افزایش اندک ضخامت رویه‌ها و یا انحنای آنها، افزایش قابل توجهی در مقاومت این ساختارهای ساندویچی رخ می‌دهد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Resistance of Singly-Curved Sandwich Shells with Metal Microlattice Core under Transverse Loading

نویسندگان [English]

  • Hosna Mahdavinia 1
  • shahabeddin hatami 2
  • Abbas Niknejad 3

1 Department of Civil Engineering, Yasouj University, Yasouj, Iran

2 Department of Civil Engineering, Yasouj University, Yasouj, Iran

3 Department of Mechanical Engineering, Yasouj University, Yasouj, Iran.

چکیده [English]

Microlattices often show a higher strength-to-weight ratio and energy absorption than other porous materials, due to its smart geometry. nowadays basic efforts are made to study mechanical behavior of sandwich structures with microlattice core, in most of the studies, the sandwich geometry is flat. Curved sandwich structure with microlattice core, due to its curved geometry and outstanding advantages of microlattice, can provide a structure with high resistance and efficiency. In the present study, flat and curved sandwich microlattices are simulated by Abaqus software and the structures are analyzed under transvers loading. The results of the analysis for a unit cell are compared with the results of previous studies and the efficiency and accuracy of the present modeling are confirmed. The studied models have different curvature and face-sheets thickness. The results show a slight increase in the face-sheets thickness or curvature yields a significant increase in the resistance of these sandwich structures.

کلیدواژه‌ها [English]

  • Finite element modeling
  • sandwich shell
  • metal microlattice
  • truss core
  • ultralight material
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