A three-phase cylindrical shear-lag model for carbon nanotube composites

2007 ◽  
Vol 196 (1-2) ◽  
pp. 33-54 ◽  
Author(s):  
Junqian Zhang ◽  
C. He
Keyword(s):  
Carbon Nanotube ◽  
Shear Lag ◽  
Shear Lag Model ◽  
Three Phase ◽  
Nanotube Composites ◽  
Lag Model ◽  
Carbon Nanotube Composites

Interfacial characteristics of hybrid nanocomposite under thermomechanical loading

2017 ◽  
Vol 26 (3-4) ◽  
pp. 95-103 ◽  
Author(s):  
Vijay Choyal ◽  
Shailesh I. Kundalwal
Keyword(s):  
Axial Stress ◽  
Interfacial Shear Stress ◽  
Transversely Isotropic ◽  
Hybrid Nanocomposite ◽  
Shear Lag ◽  
Shear Lag Model ◽  
Three Phase ◽  
Lag Model ◽  
Interfacial Characteristics ◽  
Good Agreement

AbstractIn this work, an improved shear lag model was developed to investigate the interfacial characteristics of three-phase hybrid nanocomposite which is reinforced with microscale fibers augmented with carbon nanotubes on their circumferential surfaces. The shear lag model accounts for (i) radial and axial deformations of different transversely isotropic constituents, (ii) thermomechanical loads on the representative volume element (RVE), and (iii) staggering effect of adjacent RVEs. The results from the current newly developed shear lag model are validated with the finite element simulations and found to be in good agreement. This study reveals that the reduction in the maximum value of the axial stress in the fiber and the interfacial shear stress along its length become more pronounced in the presence of applied thermomechanical loads on the staggered RVEs. The existence of shear tractions along the RVE length plays a significant role in the interfacial characteristics and cannot be ignored.

A studying on load transfer in carbon nanotube/epoxy composites under tension

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
N. V. Viet ◽  
Q. Wang ◽  
W. S. Kuo
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Load Transfer ◽  
Epoxy Composites ◽  
Shear Lag ◽  
Interface Shear ◽  
Volume Percentage ◽  
Shear Lag Model ◽  
New Findings ◽  
Lag Model

AbstractThe shear-lag model is developed to study the effect of geometry and material properties of epoxy and carbon nanotubes on load transfer in carbon nanotube/epoxy composites under tension. The results from proposed shear-lag model are validated by finite element method and the Haque’s model. Results show that the aspect ratio of the half-length to the outer radius of carbon nanotubes and their layer number have significant influence on load transfer in the composites. On the other hand, this research reveals new findings, which are not reported in other previous works. That is, no noticeable influences of the epoxy Young’s modulus and the interface shear modulus between epoxy matrix and carbon nanotube layers are found on load transfer in terms of the saturated stress length. In addition, the carbon nanotube volume percentage is found not affecting the load transfer. This research presents a better understanding on mechanical properties of carbon nanotube/epoxy composites.

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