Shear-strain step response in linear regime of dilute suspensions of naturally bent carbon nanotubes
TypeArticles dans des revues avec comité de lecture
Impressive enhancements of the storage modulus have been documented when low volume fractions of single wall carbon nanotubes (SWNTs) are added to a Newtonian solvent for obtaining dilute suspensions. The intrinsic bending dynamics of carbon nanotubes (CNTs) has been proposed to explain such elasticity. CNTs contain topological defects inducing naturally bent structures in absence of external forces and, hence, a semiflexible filament with a bent configuration at minimal internal-bending-energy is used for mimicking the structure of SWNTs in suspension. Previous continuous model is discretized as a non-freely jointed bead-rod chain with a naturally bent configuration for simulating the rheological behaviour after a shear-strain step in linear regime of SWNT dilute suspension by using a Brownian dynamics (BD) approach. In general, bead-rod chains exhibit an instantaneous relaxation after a high shear-strain step. Bending rigidity and number of constitutive rods are found to be determinant parameters in the internal-energy relaxation behaviour of non-freely jointed bead-rod chains in dilute solution. Proper comparisons between the BD simulation results and the experimental data for treated SWNT dilute suspensions confirm the consistency of the physical model mimicking the structure of a SWNT.
Files in this item
Showing items related by title, author, creator and subject.
Review on the Brownian Dynamics Simulation of Bead-Rod-Spring Models Encountered in Computational Rheology CRUZ, Camilo; CHINESTA, Francisco; REGNIER, Gilles (Springer, 2012)Kinetic theory is a mathematical framework intended to relate directly the most relevant characteristics of the molecular structure to the rheological behavior of the bulk system. In other words, kinetic theory is a ...
Mechanical and microstructural characterization of flowing weld lines in injection-molded short fiber-reinforced PBT BARADI, Mohamed Besher; CRUZ, Camilo; RIEDEL, Thomas; REGNIER, Gilles (elsevier, 2019)The aim of this work is an extensive experimental mechanical and microstructural characterization of flowing weld lines (WLs) in injection-molded short glass fiber-reinforced polybutylenterephthalate (PBT) using X-ray ...
HAMIDI, A; KHELLADI, Sofiane; ILLOUL, Lounès; SHIRINBAYAN, Mohammadali; BAKIR, Farid; TCHARKHTCHI, Abbas (ELSEVIER, 2015)Reactive Rotational Moulding (RRM) is the best process for producing large hollow plastic parts without weld lines. Constant quality in technical parts requires the process to be mastered by controlling on-line the main ...
GIRARDOT, Jérémie; ILLOUL, Lounès; LORONG, Philippe; RANC, Nicolas; SCHNEIDER, Matthieu; BERTHE, Laurent; FAVIER, Véronique (2012)These works present a numerical alternative to the simulation of the laser drilling process. The use of the finite element method to modeling the hole creation during a laser pulse shows difficulties in front of a moving ...
Procédé de perçage par laser : Comparaison entre des données expérimentales et une simulation 2D basée sur la méthode CNEM GIRARDOT, Jérémie; RANC, Nicolas; SCHNEIDER, Matthieu; LORONG, Philippe; ILLOUL, Lounès; BERTHE, Laurent; FAVIER, Véronique (Congrès français de mécanique (21 ; 2013 ; Bordeaux (Gironde), 2013)This work presents a numerical alternative for the laser drilling simulation problem. Using finite element method is difficult to simulate the hole propagation over time, especially because of moving boundaries due to a ...