This study is aimed to investigate the effect of carbon nanotube (CNT)-reinforced aluminum composites (CNT-Al composites) under a tensile loading condition at the temperature of 300 kelvin by means of molecular dynamics (MD) simulation. It is showed that the Young’s moduli of pure aluminum is improved 42% by adding a small amount of CNT and this is due to the impressive load-bearing capacity of CNT. As well as that, mechanical properties of CNT and pure aluminum are investigated using MD, that Young’s modulus of the former was 760 GPa while the latter was investigated to be 64.3 Gpa. Also it is showed that the Young’s modulus of CNT-Al is 99.74 GPa which is far more than pure aluminum. The component analysis shows that mechanical properties of CNT-Al composites increase immensely, by using a small amount of carbon nanotube. 
Keywords molecular dynamic approach, metal-matrix composites (MMCs), Young’s moduli, mechanical properties