Abstract    In this paper a three-dimensional finite element (FE) model of carbon nanocones (CNCs) is proposed and used for obtaining Young\\\'s modulus of CNCs. In this model, stretching and bending forces between carbon atoms are simulated using truss elements in ANSYS software. Then the model is subjected to the tension and by obtaining the stiffness of the CNC and using elasticity theory, Young’s modulus is calculated. The results showed that for a fixed length of CNC, the modulus increase with the increase in diameter whereas it decreases by increasing the apex angle. Also, Young’s modulus of double walled carbon nanocoes (DWCNCs) obtained between the values of each layer. Furthermore, it is showed that elastic modulus can be effected by defects and their positions in CNC.

Keywords    Carbon nanocones, Truss model, LINK8 element, ANSYS

چکیده    در اين مقاله يک مدل المان محدود سه بعدي از نانومخروط هاي کربني ارائه شده و از آن جهت بدست آوردن مدول يانگ نانومخروط کربني تک لايه و دولايه استفاده گرديده است. در اين مدل نيروهاي کششي و خمشي بين اتم هاي کربن با استفاده از المان هاي خرپا در نرم افزار انسيس شبيه سازي شده و سپس با اعمال کشش و بدست آوردن سختي نانومخروط و به کمک تئوري الاستيسبته، مدول يانگ محاسبه شده است. نتايج نشان داد در يک نانومخروط با طول ثابت، مدول با افزايش قطر افزايش مي يابد، درحالي که با افزايش زاويه راس مخروط مقدار مدول کاهش مي يابد. همچنين مدول يانگ نانومخروط دولايه کربني بدست آمده بين مقادير مدول لايه هاي آن قرار دارد. علاوه براين، اثر خرابي و موقعيت آن در مقدار مدول يانگ بررسی شده است.

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