شبیه‌سازی خواص الاستیک نانوکامپوزیت‌ پلیمر- رس

نویسندگان

گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه شهید باهنر کرمان

چکیده

در این پژوهش، سفتی نانوکامپوزیت‌ پلیمر- رس با استفاده از مدل‌های موری- تاناکا، المان محدود دو بعدی و سه بعدی شبیه‌سازی شده است. لایه‌های رس در درون زمینه پلیمری به دو صورت موازی و پراکنده‌ی تصادفی نسبت به جهت بارگذاری پخش شده‌اند. اثر عوامل ریزساختاری شامل کسر حجمی رس، مدول الاستیک رس و فاز میانی، ضخامت فاز میانی، نسبت ظاهری لایه‌های رس و جهت‌گیری لایه‌ها بر مدول الاستیک نانوکامپوزیت توسط مدل المان محدود بررسی شده است. مقایسه نتایج شبیه‌سازی با نتایج تجربی نشان داد که نتایج مدل موری- تاناکا به نتایج تجربی نزدیک‌تر بوده است. تحلیل‌ نتایج نشان داد که کسر حجمی رس، مدول الاستیک رس، میزان انحراف لایه‌های رس از جهت بارگذاری، نسبت ظاهری لایه‌های رس، ضخامت فاز میانی و مدول الاستیک فاز میانی بر مدول الاستیک نانوکامپوزیت به‌ترتیب بیشترین اثر را داشته‌اند.

کلیدواژه‌ها


عنوان مقاله [English]

Simulation of Elastic Properties of Polymer- Clay Nanocomposite

نویسندگان [English]

  • M.R. Dashtbayazi
  • M. Mahmoudi Meymand
Department of Mechanical Engineering, Faculty of Engineering, Shahid Bahonar University of Kerman
چکیده [English]

In this research, stiffness of polymer-clay nanocomposites was simulated by Mori-Tanaka and two and three dimensional finite element models. Nanoclays were dispersed into polymer matrix in two ways, namely parallel and random orientations toward loading direction. Effects of microstructural parameters including volume fraction of nanoclays, elastic modulus of nanoclays and interphase, thickness of interphase, aspect ratio of nanoclays and random orientation of nanoclays on elastic modulus of the nanocomposite were investigated by finite element model. Comparing the simulation with experimental results showed that the Mori-Tanak simulation results were closer to the experimental results. Analysis of results showed that the volume fraction of nanoclay, elastic modulus of nanoclay, deviation of nanoclay layers with respect to loading direction, nanoclays aspect ratio, thickness of interphase and the elastic modulus of interphase had respectively the most to the least effect on elastic modulus of nanocomposite.

کلیدواژه‌ها [English]

  • simulation
  • Polymer- clay nanocomposite
  • Elastic modulus
  • Finite element model
  • Mori-Tanaka model
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