GeSn Lasers with Uniaxial Tensile Strain in the Gain Medium

2019 ◽  
Author(s):  
Mathieu Bertrand ◽  
Francesco Armand Pilon ◽  
Vincent Reboud ◽  
Hans Sigg ◽  
Quang-Minh Thai ◽  
...  
Keyword(s):  
Tensile Strain ◽  
Gain Medium ◽  
Uniaxial Tensile

GeSn Lasers with Uniaxial Tensile Strain in the Gain Medium

2019 ◽  
Author(s):  
Jeremie Chretien ◽  
Alexei Chelnokov ◽  
Vincent Reboud ◽  
Jean-Michel Hartmann ◽  
Vincent Calvo ◽  
...  
Keyword(s):  
Tensile Strain ◽  
Gain Medium ◽  
Uniaxial Tensile

Required Linepipe Properties for High Strain Applications and Possible Resolution by Pipe Manufacturing Technology

2008 ◽  
Author(s):  
Hitoshi Asahi ◽  
Eiji Tsuru
Keyword(s):  
Tensile Strain ◽  
Compressive Strain ◽  
Bending Moment ◽  
Uniaxial Tensile ◽  
Buckling Behavior ◽  
Strain Limit ◽  
Bent Pipe ◽  
Uniaxial Tensile Stress ◽  
The Relationship ◽  
Pipe Manufacturing

Application of strain based design to pipelines in arctic or seismic areas has recently been recognized as important. So far, there has been much study performed on tensile strain limit and compressive strain limit. However, the relationship between bending buckling (compressive strain limit) and tensile strain limit has not been discussed. A model using actual stress strain curves suggests that the tensile strain limit increases as Y/T rises under uniaxial tensile stress because a pipe manufacturer usually raises TS instead of lowering YS to achieve low Y/T. Under bending of a pipe with a high D/t, an increase in compressive strain on intrados of a bent pipe at the maximum bending moment (ε-cp*) improves the tensile strain limit because the tensile strain limit is controlled by the onset of buckling or ε-cp* which is increased by lowering Y/T. On the other hand, under bending of a pipe with a low D/t, the tensile strain limit may not be influenced by improvement of buckling behavior because tensile strain on the extrados is already larger than the tensile limit at ε-cp*. Finally, we argue that the balance of major linepipe properties is important. Efforts other than the strict demands for pipe properties are also very important and inevitable to improve the strain capacity of a pipeline.

Cellular Strain Assessment Tool (CSAT): Precision Controlled Cyclic Uniaxial Tensile Loading

2009 ◽  
Author(s):  
Yu Ching Yung ◽  
Herman Vandenburgh ◽  
David J. Mooney
Keyword(s):  
Endothelial Cells ◽  
Tensile Strain ◽  
Assessment Tool ◽  
Umbilical Vein ◽  
Uniaxial Strain ◽  
Bottom Surface ◽  
Uniaxial Tensile ◽  
Mechanical Stimuli ◽  
Cyclic Tensile Strain ◽  
Application Range

Cells throughout our body are exposed to various forms of mechanical stimuli[1, 2]. To examine effects of mechanical cyclic strain on vascular cells, several types of strain devices have been developed, and the methods of force application range from use of dynamic indenters[3] to vacuum pressures (both positive[4] or negative[5, 6]) to stretch the bottom surface of the elastic substrate to which the cells are cultured. A number of custom uniaxial strain devices have been developed to examine cells that are normally exposed to lateral stresses[7–11]. However, a limitation to most uniaxial strain devices is that they can only accommodate a limited number of samples[8–12] at one time. Most devices also lack a platform to perform consistent clamping and loading of samples, which can significantly alter substrate strain[8, 9, 13] and ultimately, introduce large variations between experiments. Here we present a computer controlled precision strain application system composed of a custom multi-well uniaxial Cellular Strain Assessment Tool (CSAT) (Figure 1), a microscope adaptable mini CSAT, and custom elastomeric polydimethylsiloxane (PDMS) plates. The effect of cyclic tensile strain on the migration of endothelial cells was also analyzed in this study. Human umbilical vein endothelial cells (HUVECs), cultured in 2D directly on elastomeric polydimethylsiloxane (PDMS) substrates were exposed to cyclic tensile strain at physiologic levels, and demonstrated to enhance EC migration.

Mutual influence of uniaxial tensile strain and point defect pattern on electronic states in graphene

2017 ◽  
Vol 90 (6) ◽  
Author(s):  
Iyor Yu. Sagalianov ◽  
Taras M. Radchenko ◽  
Yuriy I. Prylutskyy ◽  
Valentyn A. Tatarenko ◽  
Pawel Szroeder
Keyword(s):  
Point Defect ◽  
Tensile Strain ◽  
Mutual Influence ◽  
Electronic States ◽  
Uniaxial Tensile ◽  
Defect Pattern

scholarly journals Development of an elastic cell culture substrate for a novel uniaxial tensile strain bioreactor

2013 ◽  
Vol 102 (7) ◽  
pp. 2356-2364 ◽  
Author(s):  
Matthew D. Moles ◽  
Colin A. Scotchford ◽  
Alastair Campbell Ritchie
Keyword(s):  
Cell Culture ◽  
Tensile Strain ◽  
Uniaxial Tensile ◽  
Culture Substrate ◽  
Cell Culture Substrate

Multiscale Computer Simulation of Tensile Failure in Polymer-Coated Silica Aerogels

2008 ◽  
Vol 1130 ◽  
Author(s):  
Brian Good
Keyword(s):  
Amorphous Silica ◽  
Tensile Strain ◽  
Secondary Particle ◽  
Fractal Dimensions ◽  
Silica Aerogels ◽  
Polymer Coatings ◽  
Tensile Failure ◽  
Uniaxial Tensile ◽  
Failure Behavior ◽  
Secondary Particles

AbstractThe low thermal conductivities of silica aerogels have made them of interest to the aerospace community for applications such as cryotank insulation. Recent advances in the application of conformal polymer coatings to these gels have made them significantly stronger, and potentially useful as lightweight materials for impact absorption as well. In this work, we perform multiscale computer simulations to investigate the tensile strength and failure behavior of silica and polymer-coated silica aerogels. The gels' nanostructure is simulated via a Diffusion Limited Cluster Aggregation (DLCA) procedure. The procedure produces fractal aggregates that exhibit fractal dimensions similar to those observed in real aerogels. The largest distinct feature of the clusters is the so-called secondary particle, typically tens of nm in diameter, which is composed of primary particles of amorphous silica an order of magnitude smaller. The secondary particles are connected by amorphous silica bridges that are typically smaller in diameter than the particles they connect. We investigate tensile failure via the application of a uniaxial tensile strain to the DLCA clusters. In computing the energetics of tensile strain, the detailed structure of the secondary particles is ignored, and the interaction among secondary particles is described by Morse pair potentials, representing the strain energetics of the silica gel and the polymer coating, parameterized such that the potential ranges are much smaller than the secondary particle size. The Morse parameters are obtained by separate atomistic simulation of models of the interparticle bridges and polymer coatings, with the tensile behavior of these bridges modeled via molecular statics. We consider the energetics of tensile strain and tensile failure, and compare qualitative features of low-and high-density gel failure.

scholarly journals Dielectric elastomer actuator for mechanical loading of 2D cell cultures

Lab on a Chip ◽  
2016 ◽  
Vol 16 (19) ◽  
pp. 3788-3794 ◽  
Author(s):  
Alexandre Poulin ◽  
Cansaran Saygili Demir ◽  
Samuel Rosset ◽  
Tatiana V. Petrova ◽  
Herbert Shea
Keyword(s):  
Mechanical Loading ◽  
Cell Cultures ◽  
Tensile Strain ◽  
Living Cells ◽  
Dielectric Elastomer ◽  
Uniaxial Tensile ◽  
Dielectric Elastomer Actuator

We demonstrate the first DEA-based deformable bioreactor, generating up to 35% uniaxial tensile strain on living cells.

Influence of uniaxial tensile strain on the performance of partially depleted SOI CMOS ring oscillators

2006 ◽  
Vol 27 (1) ◽  
pp. 52-54 ◽  
Author(s):  
Wei Zhao ◽  
A. Seabaugh ◽  
B. Winstead ◽  
D. Jovanovic ◽  
V. Adams
Keyword(s):  
Tensile Strain ◽  
Uniaxial Tensile ◽  
Ring Oscillators ◽  
Soi Cmos
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