Hashemi Gahruei, M., Golestanian, H., Salmani Tehrani, M. (2011). Study of Aspect Ratio Effect on Mechanical Properties Polymer/NanoComposite. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 4(1), 27-34.
Mohamad Hashemi Gahruei; Hossein Golestanian; Mehdi Salmani Tehrani. "Study of Aspect Ratio Effect on Mechanical Properties Polymer/NanoComposite". Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 4, 1, 2011, 27-34.
Hashemi Gahruei, M., Golestanian, H., Salmani Tehrani, M. (2011). 'Study of Aspect Ratio Effect on Mechanical Properties Polymer/NanoComposite', Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 4(1), pp. 27-34.
Hashemi Gahruei, M., Golestanian, H., Salmani Tehrani, M. Study of Aspect Ratio Effect on Mechanical Properties Polymer/NanoComposite. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 2011; 4(1): 27-34.
Study of Aspect Ratio Effect on Mechanical Properties Polymer/NanoComposite
2Associate Professor, Faculty of Engineering, Shahrekord University
3Assistant Professor, Department of Mechanical Engineering, Esfahan University of Technology
Abstract
Carbon nanotubes (CNTs) demonstrate unusually high stiffness, strength and resilience, and are therefore an ideal reinforcing material for nanocomposites. However, much work has to be done before the potentials of CNT-based composites can be fully realized. Evaluating the effective material properties of such nanoscale materials is a very difficult tasks. Simulations using molecular dynamics and continuum mechanics models can play significant roles in this development. Currently, the continuum approach seems to be the only feasible approach for such large scale analysis. In this paper, effective mechanical properties of CNT-based composites are evaluated using a square representative volume element (RVE) based on the continuum mechanics and Finite Element Method (FEM). Formulas are derived based on the elasticity theory to extract the effective material constants from solutions for the square RVEs under two load cases. Next, CNT aspect ratio effects on the nanocomposite mechanical properties are investigated. Results indicate that increasing CNT aspect ratio results in an increase in nanocomposite longitudinal modulus and a decrease in nanocomposite transverse modulus. Also, increasing the CNT aspect ratio resulted in a decrease in nanocomposite Poisson’s ratio in the x-y plane and an increase in nanocomposite Poisson’s ratio in the x-z plane.
بررسی اثر نسبت منظری نانولوله های کربنی روی خواص مکانیکی نانوکامپوزیت پلیمری
Authors [Persian]
محمد هاشمی گهروئی1; حسین گلستانیان2; مهدی سلمانی تهرانی3
1کارشناس ارشد مکانیک، دانشکده فنی مهندسی، دانشگاه شهرکرد، ایران
2دانشیار گروه مکانیک، دانشکده فنی مهندسی، دانشگاه شهرکرد، ایران.
3استادیار، دانشکده مکانیک، دانشگاه صنعتی اصفهان، ایران.
Abstract [Persian]
در این مقاله خواص مکانیکی نانوکامپوزیت تقویت شده با نانولوله کربنی با استفاده المان حجمی نمایندهی مربعی بر اساس مکانیک محیط پیوسته و روش المان محدود به‌دست آمده است. برای این کار ابتدا با استفاده از تئوری الاستیسیته روابط لازم برای به‌دست آوردن خواص مؤثر نانوکامپوزیت از حل المان حجمی نماینده تحت دو نوع بارگذاری استخراج شده است. سپس اثرات نسبت منظری نانولولهی کربنی بر روی خواص مکانیکی نانوکامپوزیت به‌دست آمده است. نتایج نشان میدهد که افزایش نسبت منظری نانولوله کربنی باعث افزایش مدول یانگ نانوکامپوزیت در جهت الیاف و کاهش مدول یانگ در جهت عرضی میشود. همچنین افزایش نسبت منظری نانولوله کربنی باعث افزایش نسبت پواسون در صفحهی xz و کاهش نسبت پواسون در صفحهی xy میشود.
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