Structural stability of single-layer MoS2 under large strain

2015 ◽  
Vol 27 (10) ◽  
pp. 105401 ◽  
Author(s):  
Xiaofeng Fan ◽  
W T Zheng ◽  
Jer-Lai Kuo ◽  
David J Singh
Keyword(s):  
Structural Stability ◽  
Large Strain ◽  
Single Layer

Plastic Forming Processes Through Rotating Conical Dies1

2001 ◽  
Vol 68 (6) ◽  
pp. 894-902 ◽  
Author(s):  
D. Durban ◽  
G. Davidi ◽  
D. Lior
Keyword(s):  
Single Phase ◽  
Large Strain ◽  
Single Layer ◽  
Wall Friction ◽  
Nonlinear Ordinary Differential Equations ◽  
Tube Forming ◽  
Perfectly Plastic ◽  
Governing System ◽  
Plastic Forming ◽  
Exact Relations

Drawing and extrusion of single-phase and multilayered tubes through rotating conical dies is investigated within the framework of continuum plasticity. Large strain perfectly plastic J2 flow theory models constitutive behavior along with a radial-helical flow pattern. The governing system for a single-layer process is reduced to three coupled nonlinear ordinary differential equations. An approximate solution is developed for long and tapered working zones with low wall friction. That solution is used to simulate the field within each layer in composite tube forming. Exact relations are derived for the n-layered tube and it is shown that wall rotation can considerably reduce the required working loads. Dedicated to Professor Dietmar Gross on the occasion of his 60th birthday

Electromechanical Displacement of Soft/Hard PZT Bi-Layer Composite Actuator

2015 ◽  
Vol 659 ◽  
pp. 96-101
Author(s):  
Piyalak Ngernchuklin ◽  
Arjin Boonruang ◽  
Chalearmchai Jeerapan ◽  
Pracha Laoauyporn ◽  
Sittichai Kanchanasutha ◽  
...  
Keyword(s):  
Large Strain ◽  
Ferroelectric Properties ◽  
Single Layer ◽  
Mechanical Quality Factor ◽  
Electromechanical Properties ◽  
Layer Composite ◽  
Mechanical Quality ◽  
Piezoelectric Strain ◽  
The Difference ◽  
Thermal Expansion Coefficient Mismatch

PZTs can be classified into two types, i.e., soft and hard PZTs, which are categorized by the piezoelectric and ferroelectric properties such as coercive field, piezoelectric strain, mechanical quality factor etc. It is known that the combination effect of the soft/hard PZT composites can generate large strain/actuation compared to monolithic PZT ceramics. In this study, soft and hard PZT powders were co-pressed into bi-layer disks with various ratios between soft and hard PZT powders, ranging from 0:100~100:0 vol. % (with 10 % increments) and then they were co-sintered. Due to the difference in the planar shrinkage of the two layers and thermal expansion coefficient mismatch, dome-shaped bi-layer composites with various dome heights were obtained. It was shown that the constrained layer either soft PZT or hard PZT affected various properties including the dome geometry, the strain-E-field response, and the displacement hysteresis loop. The electromechanical properties and actuation performance of such bi-layer composite actuators have been investigated and compared to the soft and hard PZT single layer counterparts.

Very large strain gauges based on single layer MoSe2 and WSe2 for sensing applications

2015 ◽  
Vol 107 (25) ◽  
pp. 253503 ◽  
Author(s):  
Manouchehr Hosseini ◽  
Mohammad Elahi ◽  
Mahdi Pourfath ◽  
David Esseni
Keyword(s):  
Large Strain ◽  
Single Layer ◽  
Strain Gauges ◽  
Sensing Applications

scholarly journals Structural stability of single-layer PdSe2 with pentagonal puckered morphology and its nanotubes

2020 ◽  
Vol 22 (16) ◽  
pp. 8289-8295 ◽  
Author(s):  
Artem V. Kuklin ◽  
Hans Ågren ◽  
Pavel V. Avramov
Keyword(s):  
Structural Stability ◽  
2D Materials ◽  
Single Layer ◽  
First Principle ◽  
First Principle Calculations ◽  
Stability And Instability

Based on first-principle calculations, we demonstrate structural stability and instability of several recently proposed 2D materials with pentagonal morphology including the experimentally exfoliated single-layer PdSe2.

Investigation of RBC Remodeling With a Multiscale Model

2010 ◽  
Author(s):  
Qiang Zhu ◽  
Zhangli Peng ◽  
Robert J. Asaro
Keyword(s):  
Blood Cell ◽  
Lipid Bilayer ◽  
Structural Stability ◽  
Composite Membrane ◽  
Red Blood Cell ◽  
Normal State ◽  
Single Layer ◽  
Multiscale Model ◽  
The Other ◽  
Mechanical Loads

Erythrocyte (red blood cell, or RBC) possesses one of the simplest and best characterized molecular architectures among all cells. It contains cytosol enclosed inside a composite membrane consisting of a fluidic lipid bilayer reinforced by a single layer of protein skeleton pinned to it. In its normal state, this system demonstrates tremendous structural stability, manifested in its ability to sustain large dynamic deformations during circulation. On the other hand, it has been illustrated in experiments that triggered by mechanical loads structural remodeling may occur. A canonical example of this remodeling is vesiculation, referring to the partial separation of the lipid bilayer from the protein skeleton and the formation of vesicles that contain lipids only.

Crystalline order to a resolution of 4.7 A in the sheath of Methanospirilium hungatii: A cross-beta structure

1984 ◽  
Vol 42 ◽  
pp. 214-215
Author(s):  
Murray Stewart ◽  
T.J. Beveridge ◽  
D. Sprott
Keyword(s):  
Cell Wall ◽  
Single Layer ◽  
Uranyl Acetate ◽  
Optical Diffraction ◽  
Tube Axis ◽  
Basic Subunit ◽  
Beta Structure ◽  
Diffraction Patterns ◽  
Protein Treatment ◽  
General Appearance

The archaebacterium Methanospirillum hungatii has a sheath as part of its cell wall which is composed mainly of protein. Treatment with dithiothreitol or NaOH released the intact sheaths and electron micrographs of this material negatively stained with uranyl acetate showed flattened hollow tubes, about 0.5 μm diameter and several microns long, in which the patterns from the top and bottom were superimposed. Single layers, derived from broken tubes, were also seen and were more simply analysed. Figure 1 shows the general appearance of a single layer. There was a faint axial periodicity at 28.5 A, which was stronger at irregular multiples of 28.5 A (3 and 4 times were most common), and fine striations were also seen at about 3° to the tube axis. Low angle electron diffraction patterns (not shown) and optical diffraction patterns (Fig. 2) from these layers showed a complex meridian (as a result of the irregular nature of the repeat along the tube axis) which showed a clear maximum at 28.5 A, consistent with the basic subunit spacing.

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