Mechanical Properties and Modeling of the Stress-Strain Behavior of the Urinary Bladder

2009 ◽  
pp. 283-283-7
Author(s):  
M Saitoh ◽  
K Ohnishi ◽  
T Matsuda ◽  
H Watanabe ◽  
AT Yokobori ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Urinary Bladder ◽  
Stress Strain ◽  
Strain Behavior

scholarly journals Investigation of the Mechanical Properties of St. Lawrence River Ice

1971 ◽  
Vol 8 (2) ◽  
pp. 163-169 ◽  
Author(s):  
L. W. Gold ◽  
A. S. Krausz
Keyword(s):  
Mechanical Properties ◽  
Strain Rate ◽  
Yield Stress ◽  
Power Law ◽  
River Ice ◽  
Stress Strain ◽  
Strain Behavior ◽  
Brittle Transition ◽  
Ductile To Brittle Transition ◽  
St Lawrence River

Observations are reported on the stress–strain behavior at −9.5 ± 0.5 °C of four types of ice obtained from the St. Lawrence River. The ice was subject to nominal rates of strain covering the range 2.1 × 10−5 min−1 to 5.8 × 10−2 min−1. A ductile-to-brittle transition was observed for strain rate of about 10−2 min−1. In the ductile range the four types had an upper yield stress that increased with strain rate according to a power law.

Determining Stress-Strain Behavior of Zr60Cu10Al15Ni15 Bulk Metallic Glass Using Object Oriented Finite Element Analysis

2017 ◽  
Vol 29 ◽  
pp. 1-8 ◽  
Author(s):  
Ketul Arvindbhai Patel ◽  
Ganesh R. Karthikeyan ◽  
S. Vincent
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Metallic Glass ◽  
Strain Analysis ◽  
Indentation Test ◽  
Object Oriented ◽  
Stress Strain ◽  
Element Analysis ◽  
Strain Behavior

Determining mechanical properties of Bulk Metallic Glasses (BMGs) requires synthesizing of the alloys in bulk form. However obtaining metallic glass in bulk form is quite challenging due to its tendency towards crystallization. In such circumstances it is beneficial to determine the mechanical properties of materials using finite elemental analysis of microstructures. Thus, in the present investigation, using Object Oriented Finite Element Analysis (OOF2) software package, Stress-Strain analysis has been carried out on Zr60Cu10Al15Ni15 BMG to determine such mechanical properties. Specimen of Zr60Cu10Al15Ni15 BMG exhibiting three microstructurally distinct regions amorphous, partial crystalline and crystalline regions was used for this analysis. The Stress-Strain relationship have been estimated for each of the three distinct phases and the results are validated by determining the Modulus of Elasticity for all the phases and comparing it with the available experimental results from Nano-indentation test.

scholarly journals Investigation of tensile properties of RTV Silicone based Isotropic Magnetorheological Elastomers.

2018 ◽  
Vol 144 ◽  
pp. 02015 ◽  
Author(s):  
Bhaktha Sandesh ◽  
Hegde Sriharsha ◽  
U. Rao Sathish ◽  
Gandhi Nikhil
Keyword(s):  
Magnetic Field ◽  
Mechanical Properties ◽  
Tensile Properties ◽  
Tensile Modulus ◽  
Stress Strain ◽  
Percentage Elongation ◽  
Strain Behavior ◽  
Non Linear ◽  
Ferro Magnetic ◽  
Hyperelastic Model

Magnetorheological elastomer (MRE) consists of an elastomer matrix and a Ferro-magnetic ingredient. The mechanical properties of MR elastomers can be reversibly controlled by applying a magnetic field of suitable intensity. The current work focusses on the enhancement of tensile property of RTV (Room Temperature Vulcanization) silicone based elastomer. The influence of Carbonyl iron powder (CIP) content and magnetic field were experimentally investigated. Addition of CIP increases the tensile modulus but it reduces the percentage elongation and tensile strength making it brittle. Under the influence of magnetic field, the enhancement of tensile properties up to 20% content was linear. The behavior above 20% is observed to be non-linear. The onset of non-linear stress-strain behavior is investigated. Regression equation is developed from the experimental data relating percentage content with the mechanical properties of MRE. The developed equation predicted the behavior of 27% MRE with an error of less than 8%. Hyperelastic model developed by Yeoh was fitted to the stress-strain behavior of MRE with minimal error.

Mechanical properties and dislocation dynamics of GaP

1989 ◽  
Vol 4 (2) ◽  
pp. 355-360 ◽  
Author(s):  
Ichiro Yonenaga ◽  
Koji Sumino
Keyword(s):  
Mechanical Properties ◽  
Dislocation Dynamics ◽  
Dynamic State ◽  
Strain Rates ◽  
Compression Tests ◽  
Stress Strain ◽  
Temperature Range ◽  
Strain Behavior ◽  
Defect Complexes ◽  
Impurity Defect

Mechanical properties of GaP crystals are investigated in the temperature range 600–900 °C by means of compression tests. Stress-strain characteristics of a GaP crystal in the temperature range 600–800 °C are very similar to those of a GaAs crystal in the temperature range 450–600 °C. The dynamic state of dislocations during deformation is determined by means of the strain-rate cycling technique. The deformation of GaP is found to be controlled by the dislocation processes the same as those in other kinds of semiconductors such as Si, Ge, and GaAs. The velocity v of dislocations that control deformation is deduced to be v = v0 τ exp(–2.2 eV/kT) as a function of the stress τ and the temperature T, where v0 is a constant and k the Boltzmann constant. The Portevin-LeChatelier effect is observed in the stress-strain behavior in the deformation at high temperatures and under low strain rates, which may be attributed to the locking of dislocations by impurities or impurity-defect complexes.

Measurement of Thin Film Mechanical Properties by Microbeam Bending

1999 ◽  
Vol 563 ◽  
Author(s):  
J. Florando ◽  
H. Fujimoto ◽  
Q. Ma ◽  
O. Kraft ◽  
R. Schwaiger ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Mechanical Properties ◽  
Metal Film ◽  
Constitutive Law ◽  
Stress Strain ◽  
Strain Behavior ◽  
Testing Method ◽  
Beam Geometry ◽  
Simple Numerical Model

AbstractAn improved microbeam bending technique has been developed for the study of mechanical properties of thin films on substrates. This testing method utilizes a triangular beam geometry and improved micromachining techniques compared to previously used methods. The technique permits the stress-strain law for a metal film on a substrate to be determined. Single crystal Si beams and bi-layer Si/Al beams of lengths 25–100 pgm have been fabricated and tested. The beams are deflected with a nanoindenter, which accurately imposes a load on the beam and measures the corresponding displacement. For the bi-layer beams, a simple numerical model utilizing a Ramburg-Osgood constitutive law the film has been developed to determine the stress-strain behavior of the Al film.

Investigation of temperature-dependent mechanical properties of CdS/PMMA nanocomposites

2011 ◽  
Vol 45 (24) ◽  
pp. 2507-2514 ◽  
Author(s):  
Sonalika Agrawal ◽  
Dinesh Patidar ◽  
N.S. Saxena
Keyword(s):  
Mechanical Properties ◽  
Weight Percent ◽  
Cds Nanoparticles ◽  
Temperature Dependent ◽  
Stress Strain ◽  
Strain Behavior ◽  
Transmission Electron ◽  
Low Weight ◽  
Different Temperatures ◽  
Solution Casting Method

Nanoparticles of chemically synthesized CdS with the different weight percents (0, 2, 4, 6, and 8 wt%) have been embedded into poly(methyl methacrylate) (PMMA) by solution casting method. The obtained CdS/PMMA nanocomposites are characterized through small-angle X-ray scattering and transmission electron microscope measurements. Temperature-dependent mechanical properties of CdS/PMMA nanocomposites have been studied at different temperatures (30, 50, 70, and 90°C) using stress–strain behavior through dynamic mechanical analyzer. Results indicate that CdS nanoparticles are uniformly distributed at low weight percent, and agglomeration of particles is observed at high weight percent and all the quantities obtained from stress–strain relations, i.e., Young’s modulus, tensile strength, and fracture energy increase up to 6 wt.% of CdS nanoparticles and then decrease for further increase of weight percent of CdS nanoparticles.

Biodegradable polyhydroxybutyrate as a polyol for elastomeric polyurethanes

2012 ◽  
Vol 66 (9) ◽  
Author(s):  
Lucy Vojtová ◽  
Vojtěch Kupka ◽  
Jan Žídek ◽  
Jaromír Wasserbauer ◽  
Petr Sedláček ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Volume Fraction ◽  
Stress Strain ◽  
Strain Behavior ◽  
Feed Stock ◽  
Measured Stress ◽  
Strain Data ◽  
Polyether Polyol ◽  
Filled Composite

AbstractIn the proposed work, new elastomeric bio-polyol based polyurethanes (bio-PUs) with specific mechanical properties were prepared by a one-shot process without the presence of a solvent. Commercial non-degradable polyether polyol derived from petrochemical feed stock was partly (in the amount of 1 mass %, 5 mass %, and 10 mass %) substituted by the biodegradable polyhydroxybutyrate (PHB). Morphology of elastomeric PU composites was evaluated by scanning electron microscopy and mechanical properties of the prepared samples were obtained by both tensile measurements and prediction via the Mooney-Rivlin equation. Electron microscopy proved that the prepared materials have the character of a particle filled composite material, where PHB particles are regular with their size of about 1–2 μm in diameter. Tensile measurements demonstrated that the Young’s modulus, tensile stress at break, and tensile strain at break of each sample increase with the increase of the volume fraction of the filler. From the measured stress-strain data, the first and the second term of the Mooney-Rivlin equation were calculated. The obtained constants were applied to recalculate the stress-strain curves. It was found that the Mooney-Rivlin equation corresponds well with the stress-strain behavior of the prepared specimens.

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