scholarly journals Mechanical Characterisation of Polybutadiene-Cellulose Diacetate Composites

1995 ◽  
Vol 4 (3) ◽  
pp. 096369359500400
Author(s):  
G. Hernández ◽  
R. Rodríguez ◽  
A. Maciel ◽  
M.V. García-Garduño ◽  
V.M. Castaño
Keyword(s):  
Young’S Modulus ◽  
Mechanical Testing ◽  
Young's Modulus ◽  
Interfacial Bonding ◽  
Cellulose Diacetate ◽  
Chemically Modified ◽  
Mechanical Characterisation ◽  
Mechanical Models

Mechanical testing the behaviour of polybutadiene-cellulose diacetate (functionallized) was performed. The cellulose diacetate was chemically modified to improve the interfacial bonding between the components. The results indicate that the Young's modulus is increased substantially as the content of the functionallized component is increased. Finally, a comparison to theoretical mechanical models is shown.

scholarly journals Synthesis, Characterization, and Modeling of Nanotube Materials with Variable Stiffness Tethers

2004 ◽  
Vol 851 ◽  
Author(s):  
S. J. V. Frankland ◽  
M. N. Herzog ◽  
G. M. Odegard ◽  
T. S. Gates ◽  
C. C. Fay
Keyword(s):  
Carbon Nanotube ◽  
Young’S Modulus ◽  
Mechanical Testing ◽  
Storage Modulus ◽  
Young's Modulus ◽  
Base Material ◽  
Variable Stiffness ◽  
Cross Linking ◽  
The Cross

ABSTRACTSynthesis, mechanical testing, and modeling have been performed for a carbon nanotube material in which the nanotubes are functionalized with variable stiffness tethers (VST) capable of cross-linking the nanotubes. Tests using nanoindentation indicated a six-fold enhancement in the storage modulus when comparing the base material (the cross-linking agent with no nanotubes) to the composite (functionalized nanotube material) that contained 5.3 wt% of nanotubes. To understand how crosslinking the nanotubes may further alter the stiffness, a model of the system was constructed using nanotubes crosslinked with the VST. The model predicted that for a composite with 5 wt% nanotubes at random orientations, crosslinked with the VST, the bulk Young's modulus was reduced to 30% that of the non-crosslinked equivalent.

Comparison of the Models to Predict the Effective Young's Modulus of Hybrid Composites Reinforced with Multi-Shape Inclusions

2013 ◽  
Vol 290 ◽  
pp. 15-20
Author(s):  
Dong Mei Luo ◽  
Hong Yang ◽  
Qiu Yan Chen ◽  
Ying Long Zhou
Keyword(s):  
Aspect Ratio ◽  
Young’S Modulus ◽  
Hybrid Composites ◽  
Young's Modulus ◽  
Controlling Factors ◽  
Isotropic Matrix ◽  
Mechanical Models ◽  
Multi Phase

In this paper, two kinds of micro-mechanical models are utilized to predict the effective Young's modulus for hybrid composites including fiber-like, spherical and needle inclusions in an isotropic matrix. The two models of Multi-Phase Mori-Tanaka Model (MP model) and Multi-Step Mori-Tanaka Model (MS model) are proposed by the authors in a series of interrelated research. The results show that the shape and the Young’s modulus of inclusion, aspect ratio of fiber-like inclusion are the controlling factors to influence the Young's modulus, and MP model is more rational to predict the effective Young’s modulus of hybrid composites reinforced with multi-shape inclusions.

Equivalent Young's modulus and thickness of graphene sheets for the continuum mechanical models

2014 ◽  
Vol 104 (22) ◽  
pp. 223101 ◽  
Author(s):  
Jin-Xing Shi ◽  
Toshiaki Natsuki ◽  
Xiao-Wen Lei ◽  
Qing-Qing Ni
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Graphene Sheets ◽  
Mechanical Models ◽  
The Continuum

Nanoindentation hardness, Young’s modulus, and creep behavior of organic–inorganic silica-based sol-gel thin films on copper

2008 ◽  
Vol 23 (9) ◽  
pp. 2357-2365 ◽  
Author(s):  
Bruno A. Latella ◽  
Bee K. Gan ◽  
Christophe J. Barbé ◽  
David J. Cassidy
Keyword(s):  
Young’S Modulus ◽  
Creep Behavior ◽  
Young's Modulus ◽  
Sol Gel ◽  
Film Structure ◽  
Creep Properties ◽  
Organically Modified ◽  
Mechanical Models ◽  
Nanoindentation Hardness ◽  
Gel Processing

In this study, the mechanical properties and creep behavior of hybrid sol-gel silica-based coatings on copper substrates were investigated. Sol-gel processing was used to synthesize the organically modified silanes using mixtures of tetraethoxysilane and vinyltrimethoxysilane or glycidoxypropyltrimethoxysilane precursors. The mechanical and creep properties of the coatings were assessed using nanoindentation. The link between film structure and creep behavior from nanoindentation experiments was examined, and simple mechanical models were used to extract Young’s modulus and viscosity from fits to creep data. It is shown that the creep response of the coatings was influenced dramatically by the chain length and amount of organic substituent.

Mechanical properties of FeAlSi powders prepared by mechanical alloying from different initial feedstock materials

2019 ◽  
Vol 107 (2) ◽  
pp. 207 ◽  
Author(s):  
Jaroslav Čech ◽  
Petr Haušild ◽  
Miroslav Karlík ◽  
Veronika Kadlecová ◽  
Jiří Čapek ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Alloying ◽  
Young’S Modulus ◽  
Milling Time ◽  
Young's Modulus ◽  
Element Model ◽  
X Ray Diffraction ◽  
X Ray ◽  
Powder Particles ◽  
Complete Homogenization

FeAl20Si20 (wt.%) powders prepared by mechanical alloying from different initial feedstock materials (Fe, Al, Si, FeAl27) were investigated in this study. Scanning electron microscopy, X-ray diffraction and nanoindentation techniques were used to analyze microstructure, phase composition and mechanical properties (hardness and Young’s modulus). Finite element model was developed to account for the decrease in measured values of mechanical properties of powder particles with increasing penetration depth caused by surrounding soft resin used for embedding powder particles. Progressive homogenization of the powders’ microstructure and an increase of hardness and Young’s modulus with milling time were observed and the time for complete homogenization was estimated.

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