There is a large variation of mechanical properties, such as Young�s moduli for nanotubes as indicated from both experimental and theoretical studies. From an early study 1, the experimental values of Young�s modulus of the carbon nanotubes was 1.3 �0.4/+0.6 TPa. While, in another study 2 measured value for Young�s modulus of nanotubes as 0.816 ± 0.41 TPa. The wide variation in the experimental results may be due to the several factors including (i) presence of defects in nanotube specimens and (ii) inherent limitations of current experimental techniques. © 2016, Springer International Publishing Switzerland.