نویسندگان
دانشگاه کاشان
چکیده
در این تحقیق با توسعه مدل دیسک دایره‌ای (CDM)، به مطالعه تنش‌های پسماند در یک سلول واحد دو فازی و سه فازی پرداخته شده است. سلول واحد درنظر گرفته شده، به‌صورت دو فازی شامل رشته کربن و ماتریس و به‌صورت سه فازی، شامل رشته کربن، نانولوله کربنی و ماتریس است. در حالت سه فازی، رشته کربنی توسط نانولوله‌های کربنی، با استفاده از روش الکتروفورز تقویت شده است. برای درصدهای حجمی متفاوت نانولوله‌های کربنی، خواص حرارتی نانولوله کربنی و رشته کربنی در راستای طولی و عرضی و نحوه قرارگیری نانولوله‌ها به‌صورت متفاوت درنظر گرفته شده است. همچنین توزیع تنش‌های پسماند در سلول واحد دو فازی و سه فازی، به شکل جداگانه مطالعه شده است. نتایج تحلیل میکرومکانیک تنش‌های پسماند به‌دست آمده، با استفاده از دو روش مجزا المان محدود و مدل دیسک دایره‌ای، نشان‌دهنده صحت ارزیابی انجام شده و توسعه روش دیسک دایره‌ای را در حالت سه‌بعدی است.
کلیدواژه‌ها
عنوان مقاله [English]
Development of Circular Disk Model for Polymeric Nanocomposites and Micromechanical Analysis of Residual Stresses in Reinforced Fibers with Carbon Nanotubes
نویسندگان [English]
- A. R. Ghasemi
- M. Mohammadi
چکیده [English]
In this study, Circular Disk Model (CDM) has been developed to determine the residual stresses in twophase and three- phase unit cell. The two-phase unit cell is consisting of carbon fiber and matrix. The three-phase unit cell is consisting of carbon fiber, carbon nanotubes and matrix in which the carbon fiber is reinforced with the carbon nanotube using electrophoresis method. For different volume fractions of carbon nanotubes, thermal properties of the carbon fiber and carbon nanotube in different linear and lateral directions and also different placement conditions of carbon nanotubes have been considered. Also, residual stresses distribution in two and three phases has been studied, separately. Results of micromechanical analysis of residual stresses obtained from Finite Element Method and CDM, confirms the evaluation and development of three dimensional CDM.
کلیدواژه‌ها [English]
- Circular Disk Model
- carbon nanotubes
- Residual stresses
- Three-Phase Unit Cell
- Micromechanical Analysis
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