Damage assessment of random multiwalled carbon nanotube-reinforced polymer nanocomposites

2018 ◽  
Vol 25 (5) ◽  
pp. 847-853
Author(s):  
Belkacem Kada ◽  
Abdullah Algarni ◽  
Mostefa Bourchak ◽  
Mahmoud N. Nahas
Keyword(s):  
Carbon Nanotube ◽  
Prediction Model ◽  
Polymer Nanocomposites ◽  
Experimental Testing ◽  
Numerical Procedure ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon ◽  
Element Analysis ◽  
Damage Initiation ◽  
Reinforced Polymer

AbstractThe paper presents a numerical procedure to evaluate the mechanical properties and predict the damage initiation of random multiwalled carbon nanotube-reinforced polymer nanocomposites (MWCNT-RPNC). The Hashin-Shtrikman (H-S) random prediction model is used to compute the properties of the reinforced polymer matrix, whereas the Chamis model is used to compute the lamina properties and the Hashin progressive damage model within the ABAQUS environment is used as a finite element analysis (FEA) tool to predict the damage initiation in the reinforced composite material. Experimental testing is employed to validate the numerical results and to adjust the H-S prediction model for MWCNT-RPNC.

Multiwalled carbon nanotube/polymer nanocomposites: Processing and properties

2005 ◽  
Vol 43 (10) ◽  
pp. 1186-1197 ◽  
Author(s):  
F. Dalmas ◽  
L. Chazeau ◽  
C. Gauthier ◽  
K. Masenelli-Varlot ◽  
R. Dendievel ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Polymer Nanocomposites ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon

Investigation of delamination and surface quality of machined holes in drilling of multiwalled carbon nanotube doped epoxy/carbon fiber reinforced polymer nanocomposite

2017 ◽  
Vol 233 (4) ◽  
pp. 647-663 ◽  
Author(s):  
Dhiraj Kumar ◽  
KK Singh
Keyword(s):  
Surface Roughness ◽  
Carbon Nanotube ◽  
Carbon Fiber ◽  
Multiwalled Carbon Nanotube ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Multiwalled Carbon ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

In the drilling of carbon fiber reinforced polymer composite materials, drilling-induced delamination and surface roughness of machined holes are causes of major concern, particularly, when components, made of carbon fiber reinforced polymer, are used in the aerospace industry. In order to minimize these drawbacks, an innovative technique has been developed by adding multiwalled carbon nanotube in the polymer matrix to improve interlaminar shear strength and flexural strength of the laminates. Experimental results indicate that with this process, flexural strength and interlaminar shear strength get enhanced by almost 24% and 28%, respectively, when compared to neat epoxy carbon fiber reinforced polymer composite. The image process results reveal that delamination factor gets decreased by 21% and 28.60% at the entrance and the exit side, respectively. This, in turn, not only reduces the delamination factor during the process but also facilitates the process to be carried out more smoothly. During this investigation, scanning acoustic microscope was used to study ply-by-ply damage followed by ultrasonic C-scan on both sides of the laminates, which showed good agreement with the experimental results. Measurement of surface roughness of the machined hole showed the maximum Ra value of 5.03 µm in neat epoxy carbon fiber reinforced polymer composite. However, a sample with 1.5 wt% of multiwalled carbon nanotube showed a decline in Ra value (1.18 µm). Thus, addition of multiwalled carbon nanotube to the polymer matrix could reduce the drilling-induced delamination as well as the surface roughness of machined hole simultaneously.

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