روش جدید تخمین کرنش تراکمی سازه‌های سلولی با استفاده از مدل‌سازی میکروساختار فوم‌ها بر اساس چینش لاگوئر

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی مکانیک، دانشگاه صنعتی خواجه نصیر الدین طوسی، تهران، ایران

2 صنعتی خواجه نصیرالدین طوسی

چکیده

در این تحقیق به بررسی رفتار جذب انرژی سازه‌های سلولی نظیر فوم‌ها از جنس آلومینوم پرداخته شده‌است. یکی از اهداف، توسعه‌ی مدل‌سازی میکروساختارسازه‌های سلولی و تحلیل رفتار پلاستیک آن‌ها از طریق روش المان محدود می‌باشد. در این تحقیق، ابتدا یک سلول واحد برای کاهش محاسبات عددی و همچنین مدل‌سازی تهیه می‌شود که دارای خواص آماری فوم موردنظر می‌باشد و سپس رفتار دینامیکی این سلول واحد تحت ضربه شبیه‌سازی شده‌است. همچنین، روش تحلیلی برای بدست‌آوردن مقدار کرنش تراکمی فوم‌ها با استفاده از نتایج المان محدود ارائه شده‌ به طوری‌که حل المان محدود ارائه‌شده در این تحقیق دارای تطابق مناسبی با روش‌های تئوری دیگر پژوهش‌های انجام‌شده می‌باشد. به عبارت دیگر، با استفاده از روش تحلیلی، روش المان محدود و شبیه‌سازی مورد ارزیابی قرار گرفته‌است. با استفاده از آزمایش‌های شبیه‌سازی‌شده، یک مدل با استفاده از روش سطح پاسخ برای بدست‌آوردن کرنش تراکمی ارائه شده‌است که نتایج حاصل از این مدل نیز مورد ارزیابی قرار گرفته‌است. نتایج حاصل ازاین پژوهش، نشان داد که امکان مدل‌سازی و تحلیل جذب انرژی (ضربه) فوم‌ها با استفاده از روش ارائه‌شده در این پژوهش امکان‌پذیر خواهد بود و می‌تواند در پژوهش‌های آینده به معادله ساختاری مناسب برای تحلیل میکروساختار انواع فوم‌ها دست یافت.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

A new method for estimating the compressive strain of cellular structures using microstructure of foams based on Laguerre tessellations

نویسندگان [English]

  • Ali Shiravand 1
  • Masood Asgari 2
1 Faculty of Mechanical Engineering, K. N. Toosi University of Technology,Tehran, Iran
چکیده [English]

In this study, energy absorption behavior of cellular structures such as foams will be investigated. In this paper, developing microstructural modeling of cellular structures and analyzing their plastic behavior through the finite element method is the main goal. In this research, a unit cell is first developed for numerical computation reduction as well as modeling that has the desired foam statistical properties, and then the dynamic behavior of this unit cell under simulated impact will be analyzed. An analytical method to obtain the compressive strain value of the foams with the help of numerical solution results will be presented. In other words, using the analytical method, the finite element method and the simulation will be evaluated. Then, using simulated experiments, a model using the response surface methodology  to obtain the compressive strain will be presented and the results of this model will be evaluated by numerical method. The results of this study showed that it is possible to model and analyze the energy absorption of the foams using the method presented in this study and as a result, suitable structural equation for microstructural analysis of foams can be obtained in future researches.
 

کلیدواژه‌ها [English]

  • Energy Absorption
  • Closed-cell foams
  • Response Surface Method
  • Compression strain
  • Laguerre method
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