On the optimal design of manufacturing-induced residual stresses in filament wound carbon fiber composite cylindrical shells reinforced with carbon nanotubes

2019 ◽  
Vol 182 ◽  
pp. 107743 ◽  
Author(s):  
Behzad Asghari ◽  
Ahmad Reza Ghasemi ◽  
Ali Tabatabaeian
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Fiber ◽  
Optimal Design ◽  
Residual Stresses ◽  
Fiber Composite ◽  
Cylindrical Shells ◽  
Carbon Fiber Composite ◽  
Filament Wound ◽  
Composite Cylindrical Shells

Experimental Investigation of the Machinability of Polycarbonate Reinforced With Multiwalled Carbon Nanotubes

2005 ◽  
Vol 128 (2) ◽  
pp. 465-473 ◽  
Author(s):  
J. Samuel ◽  
R. E. DeVor ◽  
S. G. Kapoor ◽  
K. J. Hsia
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Fiber ◽  
Multiwalled Carbon Nanotubes ◽  
Cutting Forces ◽  
Fiber Composite ◽  
Chip Morphology ◽  
Surface Characteristics ◽  
Carbon Fiber Composite ◽  
Multiwalled Carbon ◽  
Machined Surface

The machinability of a polycarbonate nanocomposite containing multiwalled carbon nanotubes is investigated and contrasted with its base polymer and with a conventional carbon fiber composite. The material microstructures are characterized using transmission electron and scanning electron microscopy methods. Micro-endmilling experiments are conducted on the three materials. Chip morphology, machined surface characteristics, and the nature of the cutting forces are employed as machinability measures for comparative purposes. Polycarbonate chips are seen to transition from being discontinuous to continuous as the feed-per-tooth (FPT) increases, while, at all FPT values the nanocomposite is seen to form comparatively thicker continuous chips. The nanocomposite and the carbon fiber composite are seen to have the lowest and the highest magnitudes, respectively, for both the surface roughness and cutting forces. Shearing along the nanotube-polymer interface and better thermal conductivity are speculated to be the mechanisms responsible for the observations seen in the nanocomposite.

scholarly journals Fabrication and mechanical behavior of carbon fiber composite sandwich cylindrical shells with corrugated cores

2016 ◽  
Vol 156 ◽  
pp. 307-319 ◽  
Author(s):  
Jian Xiong ◽  
Lina Feng ◽  
Ranajay Ghosh ◽  
Huaping Wu ◽  
Linzhi Wu ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Mechanical Behavior ◽  
Fiber Composite ◽  
Cylindrical Shells ◽  
Carbon Fiber Composite ◽  
Composite Sandwich

scholarly journals Synergetic Effects of Mechanical Properties on Graphene Nanoplatelet and Multiwalled Carbon Nanotube Hybrids Reinforced Epoxy/Carbon Fiber Composites

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Pin-Ning Wang ◽  
Tsung-Han Hsieh ◽  
Chin-Lung Chiang ◽  
Ming-Yuan Shen
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Carbon Fiber ◽  
Composite Laminates ◽  
Epoxy Composite ◽  
Fiber Composite ◽  
Synergetic Effect ◽  
Carbon Fiber Composites ◽  
Carbon Fiber Composite ◽  
Multiwalled Carbon

Graphene nanoplatelets (GNPs) and carbon nanotubes (CNTs) are novel nanofillers possessing attractive characteristics, including robust compatibility with most polymers, high absolute strength, and cost effectiveness. In this study, an outstanding synergetic effect on the grapheme nanoplatelets (GNPs) and multiwalled carbon nanotubes (CNTs) hybrids were used to reinforce epoxy composite and epoxy/carbon fiber composite laminates to enhance their mechanical properties. The mechanical properties of CNTs/GNPs hybrids on a fixed weight fraction (1 wt%) with mixing different ratio reinforced epoxy nanocomposite, such as ultimate tensile strength and flexure properties, were investigated. The mechanical properties of epoxy/carbon fiber composite laminates containing different proportions of CNTs/GNPs hybrids (0.5, 1.0, 1.5 wt%) were increased over that of neat laminates. Consequently, significant improvement in the mechanical properties was attained for these epoxy resin composites and carbon fiber-reinforced epoxy composite laminates.

Modeling the Compressive Buckling Strain as a Function of the Nanocomposite Interphase Thickness in a Carbon Nanotube Sheet Wrapped Carbon Fiber Composite

2019 ◽  
Vol 86 (10) ◽  
Author(s):  
Xuemin Wang ◽  
Tingge Xu ◽  
Rui Zhang ◽  
Monica Jung de Andrade ◽  
Pruthul Kokkada ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Polymer Matrix Composites ◽  
Fiber Composite ◽  
Unidirectional Composite ◽  
Interfacial Shear ◽  
Carbon Fiber Composite ◽  
Interphase Region

Polymer matrix composites have high strengths in tension. However, their compressive strengths are much lower than their tensile strengths due to their weak fiber/matrix interfacial shear strengths. We recently developed a new approach to fabricate composites by overwrapping individual carbon fibers or fiber tows with a carbon nanotube sheet and subsequently impregnate them into a matrix to enhance the interfacial shear strengths without degrading the tensile strengths of the carbon fibers. In this study, a theoretical analysis is conducted to identify the appropriate thickness of the nanocomposite interphase region formed by carbon nanotubes embedded in a matrix. Fibers are modeled as an anisotropic elastic material, and the nanocomposite interphase region and the matrix are considered as isotropic. A microbuckling problem is solved for the unidirectional composite under compression. The analytical solution is compared with finite element simulations for verification. It is determined that the critical load at the onset of buckling is lower in an anisotropic carbon fiber composite than in an isotropic fibfer composite due to lower transverse properties in the fibers. An optimal thickness for nanocomposite interphase region is determined, and this finding provides a guidance for the manufacture of composites using aligned carbon nanotubes as fillers in the nanocomposite interphase region.

Improved fracture toughness of carbon fiber composite functionalized with multi walled carbon nanotubes

Carbon ◽  
2008 ◽  
Vol 46 (15) ◽  
pp. 2026-2033 ◽  
Author(s):  
K.L. Kepple ◽  
G.P. Sanborn ◽  
P.A. Lacasse ◽  
K.M. Gruenberg ◽  
W.J. Ready
Keyword(s):  
Carbon Nanotubes ◽  
Fracture Toughness ◽  
Carbon Fiber ◽  
Fiber Composite ◽  
Carbon Fiber Composite ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

scholarly journals Comparative Characterization of Multiscale Carbon Fiber Composite with Long and Short MWCNTs at Higher Weight Fractions

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Michael Zimmer ◽  
Qunfeng Cheng ◽  
Shu Li ◽  
James Brooks ◽  
Richard Liang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Carbon Fiber ◽  
Fiber Composite ◽  
Carbon Fiber Composite ◽  
Multiwalled Carbon ◽  
The Matrix ◽  
Carbon Fiber Reinforced Composites ◽  
Multi Walled Carbon Nanotubes

There are documented advantages to using carbon nanotubes (CNTs) in composites for various property enhancements. However, to date, only limited studies have been conducted on using of longer CNTs over 1 mm in length. This study used long multiwalled carbon nanotubes (LMWCNTs) and their longer extended networks to test multiple properties in thermal conductivity, electrical conductivity, mechanical strength, and modulus and then compared these properties to those of shorter multi-walled carbon nanotubes (SMWCNTs). For carbon fiber-reinforced composites, the longer graphite paths from LMWCNTs in the matrix were expected to improve all properties. The longer networks were expected to allow for more undisturbed phonon transportation to improve thermal conductivity. This in turn relates to improved electrical conductivity and better mechanical properties. However, results have shown that the LMWCNTs do not improve or decrease thermal conductivity, whereas the shorter MWCNTs provide mixed results. LMWCNTs did show improvements in electrical, mechanical, and physical properties, but compared to shorter MWCNTs, the results in other certain properties varied. This perplexing outcome resides in the functioning of the networks made by both the LMWCNTs and shorter MWCNTs.

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