The Effective Mechanical Properties Of Composites Reinfored By Wavy Cnts

Nanocomposites reinforced by carbon nano-tubes exhibit great advantage in manyfields. Many scholars foxed on evoluating elastic properties of nanocomposites. There aredisagreement between theory and experimental result. Many reasons may contribute thiskind of phenomenon such as the distribution of nano-tubes in the matrix, the lowdebonding between matrix and nano-tubes and so on.The waviness of the nano-tubes is considered as one important factors of effect theelastic modulus of the nonocmposite. The present paper aims at building a new model toreplace the wavy nano-carbon tubers with “effective fiber”, With the help of the “effectivefiber”, the effective modulus of nanocomposites with roandomly oriented can becalculated using micromechanics. Numerical analysis shows that the waviness of theCNTs have a great effect on the Young’s modulus of the nanocomposites. Wedemonstrated that the new model have a result which is much close to the experimentalresult.The agglomeration on the effective modulus is also analyzed. Analytical expressionsare derived for the effective elastic modulus of carbon nanotube-reinfored composites withthe effects of waviness and agglomeration. It is shown that both of those factors cansignificantly reduce the stiffening effect of carbon nanotubers significantly. The effectivemoduli are very sensitive to the waviness and agglomeration.The model is capable of predicting axial as well as interfacial shear stresses along awavy CNT embedded in a matrix. Based on the pullout modeling technique, the effects ofwaviness, aspect ratio, on axial and interfacial shear stresses have also been analyzed indetails. An analytical model has been developed to study the stress transfer insingle-walled carbon nanotube.