The Young's Modulus, Fracture Stress, and Fracture Strain of Gellan Hydrogels Filled with Whey Protein Microparticles

2017 ◽  
Vol 82 (5) ◽  
pp. 1157-1162 ◽  
Author(s):  
Cherry Wing Yu Lam ◽  
Shinya Ikeda
Keyword(s):  
Young’S Modulus ◽  
Whey Protein ◽  
Fracture Stress ◽  
Fracture Strain ◽  
Young's Modulus ◽  
Protein Microparticles

Fabrication and Testing of Planar Stent Mesh Designs Using Carbon-Infiltrated Carbon Nanotubes

2013 ◽  
Vol 4 (2) ◽  
Author(s):  
Kristopher Jones ◽  
Brian D. Jensen ◽  
Anton Bowden
Keyword(s):  
Carbon Nanotubes ◽  
Young’S Modulus ◽  
Fracture Strain ◽  
Young's Modulus ◽  
Chemical Vapor ◽  
Pyrolytic Carbon ◽  
Compression Tests ◽  
Element Analysis ◽  
Percent Elongation ◽  
Fea Model

This paper explores and demonstrates the potential of using pyrolytic carbon as a material for coronary stents. Stents are commonly fabricated from metal, which has worse biocompatibilty than many polymers and ceramics. Pyrolytic carbon, a ceramic, is currently used in medical implant devices due to its preferable biocompatibility properties. Micropatterned pyrolytic carbon implants can be created by growing carbon nanotubes (CNTs), and then filling the space between with amorphous carbon via chemical vapor deposition (CVD). We prepared multiple samples of two different stent-like flexible mesh designs and smaller cubic structures out of carbon-infiltrated carbon nanotubes (CI-CNT). Tension loads were applied to expand the mesh samples and we recorded the forces at brittle failure. The cubic structures were used for separate compression tests. These data were then used in conjunction with a nonlinear finite element analysis (FEA) model of the stent geometry to determine Young's modulus and maximum fracture strain in tension and compression for each sample. Additionally, images were recorded of the mesh samples before, during, and at failure. These images were used to measure an overall percent elongation for each sample. The highest fracture strain observed was 1.4% and Young's modulus values confirmed that the material was similar to that used in previous carbon-infiltrated carbon nanotube work. The average percent elongation was 86% with a maximum of 145%. This exceeds a typical target of 66%. The material properties found from compression testing show less stiffness than the mesh samples; however, specimen evaluation reveals poorly infiltrated samples.

scholarly journals Effect of Defects on the Mechanical and Thermal Properties of Graphene

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 347 ◽  
Author(s):  
Maoyuan Li ◽  
Tianzhengxiong Deng ◽  
Bing Zheng ◽  
Yun Zhang ◽  
Yonggui Liao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Thermal Properties ◽  
Strain Rate ◽  
Young’S Modulus ◽  
Fracture Strength ◽  
Fracture Strain ◽  
Young's Modulus ◽  
Pristine Graphene ◽  
Mechanical And Thermal Properties

In this study, the mechanical and thermal properties of graphene were systematically investigated using molecular dynamic simulations. The effects of temperature, strain rate and defect on the mechanical properties, including Young’s modulus, fracture strength and fracture strain, were studied. The results indicate that the Young’s modulus, fracture strength and fracture strain of graphene decreased with the increase of temperature, while the fracture strength of graphene along the zigzag direction was more sensitive to the strain rate than that along armchair direction by calculating the strain rate sensitive index. The mechanical properties were significantly reduced with the existence of defect, which was due to more cracks and local stress concentration points. Besides, the thermal conductivity of graphene followed a power law of λ~L0.28, and decreased monotonously with the increase of defect concentration. Compared with the pristine graphene, the thermal conductivity of defective graphene showed a low temperature-dependent behavior since the phonon scattering caused by defect dominated the thermal properties. In addition, the corresponding underlying mechanisms were analyzed by the stress distribution, fracture structure during the deformation and phonon vibration power spectrum.

Young's modulus, fracture strain, and tensile strength of sputtered titanium thin films

2005 ◽  
Vol 484 (1-2) ◽  
pp. 245-250 ◽  
Author(s):  
Toshiyuki Tsuchiya ◽  
Masakazu Hirata ◽  
Norio Chiba
Keyword(s):  
Thin Films ◽  
Tensile Strength ◽  
Young’S Modulus ◽  
Fracture Strain ◽  
Young's Modulus ◽  
Titanium Thin Films

The Effect of 555-777 Defect on Mechanical Properties of Graphene Nanoribbon

2021 ◽  
Vol 1032 ◽  
pp. 67-72
Author(s):  
Xiao Fei Ma ◽  
Xue Mei Sun ◽  
Rui Wang ◽  
Shuai Li
Keyword(s):  
Mechanical Properties ◽  
Young’S Modulus ◽  
Fracture Strength ◽  
Fracture Strain ◽  
Graphene Nanoribbons ◽  
Young's Modulus ◽  
Simulation Results ◽  
Armchair Graphene Nanoribbons ◽  
Dynamics Simulations ◽  
Zigzag Graphene Nanoribbons

In this study, the effects of 555-777 defect on Young’s modulus, fracture strength and fracture strain of armchair graphene nanoribbons (AGNRs) and zigzag graphene nanoribbons (ZGNRs) were investigated by using Molecular Dynamics simulations under uniaxial tension. The simulation results show that 555-777 defect significantly reduces the fracture strength and fracture strain of AGNRs and ZGNRs, but has little effect on Young's modulus. The influence of 555-777 defect on the mechanical properties of AGNRs is greater than that of ZGNRs. This study provides a better understanding of mechanical properties of graphene nanoribbons.

scholarly journals Investigation on the mechanical properties and fracture phenomenon of silicon doped graphene by molecular dynamics simulation

RSC Advances ◽  
2020 ◽  
Vol 10 (52) ◽  
pp. 31318-31332
Author(s):  
Md. Habibur Rahman ◽  
Shailee Mitra ◽  
Mohammad Motalab ◽  
Pritom Bose
Keyword(s):  
Mechanical Properties ◽  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Young’S Modulus ◽  
Fracture Stress ◽  
Young's Modulus ◽  
Dynamics Simulation ◽  
Silicon Doping ◽  
Doped Graphene ◽  
Silicon Doped

Variations of fracture stress and Young’s modulus of graphene with the concentration of silicon doping.

Residual stress, Young's modulus and fracture stress of hot flame deposited diamond

1995 ◽  
Vol 270 (1-2) ◽  
pp. 137-142 ◽  
Author(s):  
P. Hollman ◽  
A. Alahelisten ◽  
M. Olsson ◽  
S. Hogmark
Keyword(s):  
Residual Stress ◽  
Young’S Modulus ◽  
Fracture Stress ◽  
Young's Modulus

Measurement of Young's modulus and fracture stress on HTR particle coatings by the brittle ring test

1972 ◽  
Vol 45 (3) ◽  
pp. 261-264 ◽  
Author(s):  
K. Bongartz ◽  
E. Gyarmati ◽  
H. Nickel ◽  
H. Schuster ◽  
W. Winter
Keyword(s):  
Young’S Modulus ◽  
Fracture Stress ◽  
Young's Modulus ◽  
Ring Test

Estimation of Young’s modulus, residual strain and intrinsic fracture strain of Bi2212 filaments in Bi2212/Ag/Ag alloy composite wire

2008 ◽  
Vol 468 (15-20) ◽  
pp. 1792-1795 ◽  
Author(s):  
J.K. Shin ◽  
S. Ochiai ◽  
H. Okuda ◽  
Y. Mukai ◽  
H. Matsubayashi ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Residual Strain ◽  
Fracture Strain ◽  
Young's Modulus ◽  
Composite Wire ◽  
Alloy Composite

scholarly journals Effects of temperature and intrinsic structural defects on mechanical properties and thermal conductivities of InSe monolayers

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Van-Trung Pham ◽  
Te-Hua Fang
Keyword(s):  
Mechanical Properties ◽  
Molecular Dynamics ◽  
Tensile Strength ◽  
Young’S Modulus ◽  
Fracture Strain ◽  
Young's Modulus ◽  
Vacancy Defect ◽  
Structural Defects ◽  
Effects Of Temperature ◽  
Dynamics Simulations

Abstract We conduct molecular dynamics simulations to study the mechanical and thermal properties of monolayer indium selenide (InSe) sheets. The influences of temperature, intrinsic structural defect on the tensile properties were assessed by tensile strength, fracture strain, and Young’s modulus. We found that the tensile strength, fracture strain, and Young’s modulus reduce as increasing temperature. The results also indicate that with the existence of defects, the stress is concentrated at the region around the vacancy leading to the easier destruction. Therefore, the mechanical properties were considerably decreased with intrinsic structural defects. Moreover, Young’s modulus is isotropy in both zigzag and armchair directions. The point defect almost has no influence on Young’s modulus but it strongly influences the ultimate strength and fracture strain. Besides, the effects of temperature, length size, vacancy defect on thermal conductivity (κ) of monolayer InSe sheets were also studied by using none-equilibrium molecular dynamics simulations. The κ significantly arises as increasing the length of InSe sheets. The κ of monolayer InSe with infinite length at 300 K in armchair direction is 46.18 W/m K, while in zigzag direction is 45.87 W/m K. The difference of κ values in both directions is very small, indicating the isotropic properties in thermal conduction of this material. The κ decrease as increasing the temperature. The κ goes down with the number of atoms vacancy defect increases.

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