توسعه فراسازه چندسلولی اوریگامی جدید و بررسی رفتار عددی و تجربی رفتار جذب انرژی

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشکده مهندسی مکانیک، دانشگاه صنعتی خواجه نصیرالدین طوسی، تهران، ایران

چکیده

امروزه استفاده از ساخت افزودنی، امکان ایجاد فراسازه‌های با هندسه پیچیده را فراهم کرده‌است. یکی از سازه‌هایی که امروزه در زمینه‌های مختلف از جمله جذب انرژی مورد توجه قرار گرفته است، سازه‌های اوریگامی می‌باشد. در پژوهش حاضر، به منظور بهبود خواص جذب انرژی تحت فشار محوری شبه استاتیک، فراسازه‌ چند سلولی اوریگامی نوینی معرفی شده‌است. این سازه‌ها با دو پارامتر تعداد لایه و نسبت دو ضلع بالا و پایین از یکدیگر متمایز شده‌اند. به منظور استخراج خواص جذب انرژی این سازه‌ها شبیه‌سازی عددی با استفاده از نرم‌افزار آباکوس انجام شد و این نتایج با آزمایش تجربی مدل‌های ساخته شده به روش ساخت افرودنی صحه گذاری شدند. همچنین برای مقایسه میان سازه‌های اوریگامی و غیر اوریگامی یک سازه ساده نیز طراحی و مورد آزمایش قرار گرفت. نتایج این پژوهش نشان داد پارامترهای هندسی نقش مهمی در افزایش قابلیت جذب انرژی دارند و سازه‌های اوریگامی به میزان 97 درصد افزایش جذب انرژی را نسبت به سازه غیر اوریگامی داشتند.  در کنار این موارد، بر اساس روش ارزیابی تناسبی پیچیده بهترین سازه از میان سازه‌های طراحی شده بر مبنای معیارهای جذب انرژی مشخص گردید.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Development of a novel multi-cellular origami metastructure and investigation into numerical and experimental energy absorption behaviour

نویسندگان [English]

  • Mohammad Mazaheri
  • Mohammad Khalajzadeh
  • Masood Asgari
K. N. Toosi University of Technology
چکیده [English]

Nowadays, the use of additive manufacturing provides a unique opportunity to create complex structures. One such structure that is currently garnering attention in various fields, such as energy absorption, is origami structures. In this paper, novel multi-cellular origami structures are introduced to improve energy absorption performance under quasi-static compression loading. The control of these structures is determined by two key parameters: the number of layers and the ratio between the length of the top side and the bottom side. The effects of these structures on crashworthiness were simulated using Abaqus software and validated through experimental tests with models built using additive manufacturing. Additionally, a simple structure was designed and tested to facilitate a comparison between origami and non-origami structures. The results of this study showed that geometric parameters play an important role in increasing energy absorption behaviour, with origami structures exhibiting a 97 percent increase in specific energy absorption (SEA) compared to non-origami structures. Finally, based on the complex proportional assessment method, the best structure was determined among those designed according to energy absorption criteria.

کلیدواژه‌ها [English]

  • Origami
  • Origami Structures
  • Energy Absorption
  • Additive Manufacturing
  • Multicellular Origami Metastructure
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