Experimental and mechanical analysis of cement–nanotube nanocomposites

Bulletin of Materials Science

关键词: Carbon nanotubes;    cement;    nanocomposites;    finite-element method;    modal analysis. 1. Introduction Researchers have attempted to estimate the mechanical properties of multi- and single-walled nanotubes (MWNTs and SWNTs, respectively) in manyways, including experimental, molecular dynamics (MD) and elastic continuum modelling methods. The discovery of carbon nanotubes (CNTs) brings with it the opportunit;   

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Composites of multi-walled carbon nanotubes (MWCNTs) and cement layers were manufactured by grindingcarbon nanotubes and cement powder in a planetary ball mill. Tiny cement nanoparticles were fabricated using anethylene-glycol-assisted synthesis procedure with successive hydrolysis and condensation reactions. Cement–nanotubenanocomposites were then produced by adding functionalized nanotube powder to the colloidal cement nanoparticles suspendedin ethylene glycol (weight ratio of nanotubes to cement = 1:1). Modal analysis of five-walled carbon nanotubenanocomposites with 1–5 cement layers was performed via the finite-element method. The five-walled carbon nanotubenanocomposites with different shapes were modelled using three-dimensional elastic beams of carbon bonds, nodal carbonpoint masses and cement layer shell elements. The natural frequency, vonMises stress and strain energy of the elements werecalculated by considering the Van derWaals forces between the carbon atoms in the hexagonal lattice. In the modal analysis,the greatest variation in displacement was observed along the x-axis, and the maximum values of the total displacementappeared to be larger at the cement layers than at the MWCNTs. The cement–nanotube nanocomposites exhibited a gradualdecrease in deformation and vibration as the number of cement layers was increased.

【 授权许可】

CC BY