MULTISCALE ANALYSIS OF THERMO-MECHANICAL BEHAVIOR OF BORON NITRIDE-REINFORCED EPOXY NANOCOMPOSITES

2021 ◽  
Author(s):  
OLANREWAJU ALUKO ◽  
S. GOWTHAM ◽  
EVAN J. PINEDA ◽  
GREGORY M. ODEGARD
Keyword(s):  
Mechanical Properties ◽  
Multiscale Analysis ◽  
Epoxy Composites ◽  
Length Scale ◽  
Epoxy Nanocomposites ◽  
Remarkable Effect ◽  
Multi Scale ◽  
Aspect Ratios ◽  
Material Systems ◽  
Mechanical Performances

The effect of size, shape, morphology, and arrangement of micro constituents of Boron Nitrite (BN) nanoplatelet/epoxy composites on their properties were investigated using a multi scale approach that includes Molecular Dynamics (MD) and micromechanics. The thermo-mechanical properties of the composites were evaluated using molecular theory and the analysis showed that the elastic constants of BN/epoxy composites were not severely affected by temperature. Also, the micromechanical analysis of Generalized Method of Cells (GMC) was utilized at higher length scale to evaluate elastic properties of the composites, for different geometries and arrangements of micro constituents. The predicted results of the analysis showed that the size, aspect ratios, morphology, and the arrangements of inclusions in BN/epoxy nanocomposites all have remarkable effect on the mechanical performances of the material systems.

scholarly journals Assessing the Critical Multifunctionality Threshold for Optimal Electrical, Thermal, and Nanomechanical Properties of Carbon Nanotubes/Epoxy Nanocomposites for Aerospace Applications

Aerospace ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. 7 ◽  
Author(s):  
Aikaterini-Flora Trompeta ◽  
Elias Koumoulos ◽  
Sotirios Stavropoulos ◽  
Theodoros Velmachos ◽  
Georgios Psarras ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Thermal Stability ◽  
Electrical Conductivity ◽  
Critical Concentration ◽  
Epoxy Composites ◽  
Micro Computed Tomography ◽  
Epoxy Nanocomposites ◽  
Aerospace Structures ◽  
Nanomechanical Properties

Epoxy composites are widely used in primary aerospace structures, where high impact damage properties are necessary. However, challenges appear when multiple functionalities, including electrical and thermal conductivity, are needed in parallel with increased mechanical properties. The current study aims at the assessment of a critical concentration of multiwalled carbon nanotubes (MWCNTs), incorporated in epoxy resin, which will indicate a threshold for optimal electrical, thermal and mechanical properties. For the evaluation of this optimal concentration, electrical conductivity, thermal stability and nanomechanical properties (Young modulus and nanohardness) have been assessed, for epoxy nanocomposites with 0 to 15 parts per hundred resin per weight (phr) MWCNTs. Percolation theory was applied to study the electrical conductivity for different contents of MWCNTs in the epoxy nanocomposite system. Thermogravimetric analysis was employed for the assessment of the epoxy composites’ thermal properties. Nanohardness and elastic modulus were measured, and the hardness versus modulus index was calculated. Emphasis was given to the dispersion of MWCNTs in the epoxy matrix, which was assessed by both microscopy techniques and X-ray micro–computed tomography. A correlation between the optimum dispersion and MWCNTs content in terms of electrical conductivity, thermal stability, and nanomechanical properties revealed a threshold concentration at 3 phr, allowing the manufacturing of aerospace structures with multifunctional properties.

Mechanical properties and fracture behaviors of epoxy composites with multi-scale rubber particles

2013 ◽  
Vol 141 (1) ◽  
pp. 333-342 ◽  
Author(s):  
Long-Cheng Tang ◽  
Xu Wang ◽  
Yan-Jun Wan ◽  
Lian-Bin Wu ◽  
Jian-Xiong Jiang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Epoxy Composites ◽  
Multi Scale ◽  
Fracture Behaviors ◽  
Rubber Particles

Hybrid multi-scale epoxy composites containing conventional glass microfibers and electrospun glass nanofibers with improved mechanical properties

2015 ◽  
Vol 132 (44) ◽  
pp. n/a-n/a ◽  
Author(s):  
Yong Zhao ◽  
Tao Xu ◽  
Xiaojing Ma ◽  
Min Xi ◽  
David R. Salem ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Epoxy Composites ◽  
Multi Scale

Preparation and Performance under Corrosive Environment of Epoxy-Nanocomposite

2007 ◽  
Vol 353-358 ◽  
pp. 2167-2170 ◽  
Author(s):  
N. Abacha ◽  
M. Kubouchi ◽  
K. Tsuda ◽  
T. Sakai
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Immersion Time ◽  
Acid Corrosion ◽  
Epoxy Composites ◽  
Corrosive Environment ◽  
Epoxy Nanocomposite ◽  
Sulfuric Acid Corrosion ◽  
And Performance ◽  
Mechanical Performances

Epoxy-organoclay nanocomposite were prepared and investigated in terms of mechanical properties and also in term of water diffusion and sulfuric acid corrosion resistance. Diffusion was studied through epoxy samples containing up to 6phr of organically treated montmorillonite. The diffusion of the environmental solution was measured by immersion of the samples in these solutions at elevated temperature with noting the increase in weight as immersion function of time. An evaluation by flexural strength of the nanoclay/epoxy composites samples was made to compare their mechanical performances under corrosive environment as a function of immersion time and temperature.

Enhanced mechanical properties of ammonia-modified graphene nanosheets/epoxy nanocomposites

RSC Advances ◽  
2015 ◽  
Vol 5 (36) ◽  
pp. 28098-28104 ◽  
Author(s):  
Dong-Dong Zhang ◽  
Dong-Lin Zhao ◽  
Ran-Ran Yao ◽  
Wei-Gang Xie
Keyword(s):  
Mechanical Properties ◽  
Epoxy Matrix ◽  
Graphene Nanosheets ◽  
Amine Functionalization ◽  
Epoxy Nanocomposites ◽  
Obvious Effect ◽  
Mechanical Performances ◽  
Modified Graphene ◽  
Matrix Nanocomposites

The amine-functionalization of GNSs with ammonia had an obvious effect on the mechanical performances of epoxy matrix nanocomposites.

Computational modeling of carbon nanofibers reinforced composites: A comparative study

2021 ◽  
pp. 002199832098789
Author(s):  
Pei-Liang Bian ◽  
Hai Qing
Keyword(s):  
Mechanical Properties ◽  
Comparative Study ◽  
Element Model ◽  
Beam Element ◽  
Reinforced Composites ◽  
Multi Scale ◽  
Solid Element ◽  
Aspect Ratios ◽  
Embedded Model ◽  
Parametric Studies

The carbon nanotubes/nanofibers reinforced composites (CNRC) show great mechanical properties. There are several methods to simulate the mechanical properties of composites. Among the modeling techniques, embedded region (ER) shows the possibility for direct multi-scale simulation. A comparative study among beam element embedded model, solid element embedded model, as well as common solid element model is carried out. Programs developed in Matlab are utilized to generate geometric configurations, and finite element models are obtained from MSC.Patran with a script written in the Patran command language (PCL). Besides, a set of parametric studies are performed to investigate the influence of the aspect ratios of nanofibers and load cases on the mechanical properties of CNRC. The result shows that the ER technique is reliable to represent composites though neglecting the localized stress concentration, and beam element embedded models are trustworthy only for nanofibers with a large aspect ratio.

The assessment of carbon nanotube (CNT) geometry on the mechanical properties of epoxy nanocomposites

2020 ◽  
pp. 2050005
Author(s):  
O. Aluko ◽  
S. Gowtham ◽  
G. M. Odegard
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Dynamics Simulation ◽  
Computational Results ◽  
Reactive Force ◽  
Elastic Parameters ◽  
Epoxy Nanocomposites ◽  
Single Walled Carbon Nanotube ◽  
Geometric Effect ◽  
Mechanical Performances

The geometric effect of single-walled carbon nanotube (CNT) on mechanical performances of epoxy nanocomposites was investigated under different loading conditions. The reactive force field (ReaxFF) and optimum liquid potential simulator (OPLS) were used in the computational molecular dynamics simulation. The analysis comprises the methodology employed to model the equilibrated structures of CNT/epoxy nanocomposites and characterizes elastic parameters of the structures. The computational results showed that the chirality of the CNTs affects the mechanical performances of the nanocomposites.

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