Molecular Dynamics for the Prediction of the Interfacial Shear Stress and Interface Dielectric Properties of Carbon Fiber Epoxy Composites

2018 ◽  
Author(s):  
RAJNI CHAHAL ◽  
ASHFAQ ADNAN ◽  
KENNETH REIFSNIDER ◽  
RASSEL RAIHAN ◽  
YUAN TING WU ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Shear Stress ◽  
Dielectric Properties ◽  
Carbon Fiber ◽  
Interfacial Shear Stress ◽  
Interfacial Shear ◽  
Epoxy Composites ◽  
Carbon Fiber Epoxy

Deformation Micromechanics in Model Carbon Fiber Reinforced Composites Part II: The Microbond Test

1997 ◽  
Vol 67 (2) ◽  
pp. 93-100 ◽  
Author(s):  
X. Gu ◽  
R. J. Young
Keyword(s):  
Carbon Fiber ◽  
Interfacial Shear Stress ◽  
Interfacial Shear ◽  
Radial Compression ◽  
Droplet Shape ◽  
Geometric Factors ◽  
Epoxy Resin System ◽  
Microbond Test ◽  
Carbon Fiber Reinforced Composites ◽  
Carbon Fiber Epoxy

Raman spectroscopy is used to study the deformation micromechanics of the microbond test for a carbon fiber epoxy resin system using surface-treated and untreated PAN-based fibers, and the results are compared with those of the conventional microbond test. Fiber strain and interfacial shear stress (ISS) are mapped along the embedded regions of fibers during the test using the Raman technique, and the maximum value of ISS, τmax, is determined. The maximum τmax value can be used to characterize the strength of the fiber matrix interface, and it is higher for specimens with surface-treated fibers. The apparent value of interfacial shear strength, τ a, determined from conventional analysis of the microbond test, is a function of the embedded fiber length. However, the value of τ a extrapolated to zero embedded length, τ i, is comparable to the maximum ISS value, τmax, determined from the Raman analysis. The influence on the results of radial compression and geometric factors, such as droplet shape and size and separation of the knife edges, is also discussed.

scholarly journals Interfacial Characteristics of Carbon Nanotube-Polyethylene Composites Using Molecular Dynamics Simulations

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Z. Q. Zhang ◽  
D. K. Ward ◽  
Y. Xue ◽  
H. W. Zhang ◽  
M. F. Horstemeyer
Keyword(s):  
Molecular Dynamics ◽  
Shear Stress ◽  
Carbon Nanotube ◽  
Interfacial Shear Stress ◽  
Md Simulations ◽  
Interfacial Properties ◽  
Interfacial Shear ◽  
Sliding Velocity ◽  
Interfacial Behavior ◽  
Rate Dependency

The rate-dependent interfacial behavior between a carbon nanotube (CNT) and a polyethylene (PE) matrix is investigated using molecular dynamics (MD) simulations. Various MD simulations were set up to determine the “size” effects on the interfacial properties, such as the molecular weight, or the length of the polymer, the diameter of the CNT, and the simulation model size. The interfacial rate-dependency was probed by applying various relative sliding velocities between the CNT and the polymer. Two quantities, directly obtained from the MD simulations, described the interfacial properties: the critical interfacial shear stress (CISS) and the steady interfacial shear stress (SISS). The simulations show that the SISS was not sensitive to the simulation size. In addition, the CISS was dependent upon the combined factors of the variation in PE stiffness, induced by simulation size changes and the effect of the fixed boundaries of the simulation models. The CISS increases almost linearly with the relative sliding velocity of CNTs. Also, a linear relationship between the SISS and the CNT-sliding velocity is observed when the SISS drops below a critical value. A clear size scaling is observed as the CISS and SISS decrease with increasing CNT radius and increase with the increasing polymer chain length.

Explaining Spring-In in Filament Wound Carbon Fiber/Epoxy Composites

2000 ◽  
Vol 34 (13) ◽  
pp. 1216-1239
Author(s):  
JEFF M. GANLEY ◽  
ARUP K. MAJI ◽  
STEVEN HUYBRECHTS
Keyword(s):  
Carbon Fiber ◽  
Epoxy Composites ◽  
Filament Wound ◽  
Carbon Fiber Epoxy

scholarly journals Improving flexural and dielectric properties of carbon fiber epoxy composite laminates reinforced with carbon nanotubes interlayer using electrospray deposition

2020 ◽  
Vol 9 (1) ◽  
pp. 1170-1182
Author(s):  
Muhammad Razlan Zakaria ◽  
Hazizan Md Akil ◽  
Mohd Firdaus Omar ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Aslina Anjang Ab Rahman ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Dielectric Properties ◽  
Carbon Fiber ◽  
Composite Laminates ◽  
Epoxy Composite ◽  
Flexural Modulus ◽  
X Ray Diffraction ◽  
Electrospray Deposition ◽  
Ft Ir ◽  
Carbon Fiber Epoxy

AbstractThe electrospray deposition method was used to deposit carbon nanotubes (CNT) onto the surfaces of woven carbon fiber (CF) to produce woven hybrid carbon fiber–carbon nanotubes (CF–CNT). Extreme high-resolution field emission scanning electron microscopy (XHR-FESEM), X-ray diffraction (XRD), Raman spectroscopy and Fourier transform infrared spectroscopy (FT-IR) were used to analyze the woven hybrid CF–CNT. The results demonstrated that CNT was successfully and homogenously distributed on the woven CF surface. Woven hybrid CF–CNT epoxy composite laminates were then prepared and compared with woven CF epoxy composite laminates in terms of their flexural and dielectric properties. The results indicated that the flexural strength, flexural modulus and dielectric constant of the woven hybrid CF–CNT epoxy composite laminates were improved up to 19, 27 and 25%, respectively, compared with the woven CF epoxy composite laminates.

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