Disclination regulated depression and elevation of glassy nematic coatings on soft elastic substrates

2020 ◽  
Vol 40 ◽  
pp. 100938
Author(s):  
W.X. Qian ◽  
Y. Ni ◽  
L.H. He
Keyword(s):  
Elastic Substrates

A Study on Length Scale Effects on Indentation Delamination of Thin Films

2004 ◽  
Author(s):  
W. Li ◽  
S. Qu ◽  
T. Siegmund ◽  
Y. Huang
Keyword(s):  
Plastic Deformation ◽  
Strain Gradient ◽  
Cohesive Zone ◽  
Cohesive Zone Model ◽  
Scale Effects ◽  
Scale Dependence ◽  
Zone Model ◽  
Length Scale ◽  
Gradient Plasticity ◽  
Elastic Substrates

Simulations of indentation delamination of ductile films on elastic substrates are performed. A cohesive zone model accounts for initiation and growth of interface delaminations and a strain gradient plasticity framework for the length scale dependence of plastic deformation. With the cohesive zone model and the strain gradient formulation two length scales are introduced in to the analysis.

scholarly journals The macroscopic delamination of thin films from elastic substrates

2009 ◽  
Vol 106 (27) ◽  
pp. 10901-10906 ◽  
Author(s):  
D. Vella ◽  
J. Bico ◽  
A. Boudaoud ◽  
B. Roman ◽  
P. M. Reis
Keyword(s):  
Thin Films ◽  
Elastic Substrates

Lubricated steady sliding of a rigid sphere on a soft elastic substrate: hydrodynamic friction in the Hertz limit

Soft Matter ◽  
2020 ◽  
Vol 16 (11) ◽  
pp. 2760-2773 ◽  
Author(s):  
Haibin Wu ◽  
Nichole Moyle ◽  
Anand Jagota ◽  
Chung-Yuen Hui
Keyword(s):  
Rigid Sphere ◽  
Elastic Substrate ◽  
Hydrodynamic Friction ◽  
Elastic Substrates ◽  
Lubricated Sliding

Lubricated sliding on soft elastic substrates occurs in a variety of natural and technological settings.

Elastocapillarity and rolling dynamics of solid nanoparticles on soft elastic substrates

Soft Matter ◽  
2020 ◽  
Vol 16 (9) ◽  
pp. 2230-2237
Author(s):  
Yuan Tian ◽  
Heyi Liang ◽  
Andrey V. Dobrynin
Keyword(s):  
Friction Forces ◽  
Elastic Substrates

The motion of nanoparticles on soft surfaces is the result of interplay between capillary, elastic and friction forces.

IMPURITY INDUCED WRINKLING PATTERNS IN METAL FILMS DEPOSITED ON SOFT ELASTIC SUBSTRATES

2017 ◽  
Vol 24 (03) ◽  
pp. 1750034 ◽  
Author(s):  
YONG-JU ZHANG ◽  
SEN-JIANG YU ◽  
MIAO-GEN CHEN ◽  
PING-GEN CAI ◽  
HONG ZHOU
Keyword(s):  
Atomic Force Microscopy ◽  
Structural Characteristics ◽  
Metal Films ◽  
Force Microscopy ◽  
Physical Mechanisms ◽  
Linear Defects ◽  
Atomic Force ◽  
Elastic Substrates ◽  
Direct Current Sputtering ◽  
The Continuum

Metal (iron and nickel) films have been deposited on soft elastic polydimethylsiloxane (PDMS) substrates by direct current sputtering technique and the impurity induced wrinkling patterns are investigated by using optical microscopy and atomic force microscopy. It is found that the metal films can spontaneously form disordered wrinkles due to the isotropic compressive stress. In the vicinity of film impurities such as extraneous particles, linear defects, cracks and thickness-gradient film edges, the stress field becomes anisotropic owing to symmetry breaking and thus complex wrinkling patterns including straight stripes, herringbones, crossings, labyrinths and their transitions can be observed. The morphological evolutions, structural characteristics and physical mechanisms of the impurity induced wrinkles have been discussed and analyzed based on the continuum elastic theory.

Effect of Elastic Mismatch and Anisotropy on Cracking of Brittle Films on Elastic Substrates

2011 ◽  
Vol 465 ◽  
pp. 235-238
Author(s):  
Michal Kotoul ◽  
Tomas Vyslouzil
Keyword(s):  
Weight Function ◽  
Epitaxial Layer ◽  
Elastic Anisotropy ◽  
Minimum Energy ◽  
Inp Substrate ◽  
Elastic Substrates ◽  
Elastic Mismatch

The paper analyzes the depth and spacing of cracks in a tensile strained In0.25Ga0.75As epitaxial layer on a InP substrate using the minimum energy theorem. The elastic anisotropy of both the layer and the substrate is considered. The concept of weight function obtained numerically by means of detailed FEM is employed.

scholarly journals Myofibrillar Structural Variability Underlies Contractile Function in Stem Cell-Derived Cardiomyocytes

2020 ◽  
Author(s):  
Kathryn Ufford ◽  
Sabrina Friedline ◽  
Zhaowen Tong ◽  
Vi T. Tang ◽  
Amani S. Dobbs ◽  
...  
Keyword(s):  
Stem Cell ◽  
Disease Modeling ◽  
Contractile Function ◽  
Embryonic Stem ◽  
Induced Pluripotent Stem Cell ◽  
Primary Objective ◽  
Intrinsic Variability ◽  
Elastic Substrates ◽  
Induced Pluripotent ◽  
The Impact

SummaryDisease modeling and pharmaceutical testing using cardiomyocytes derived from induced pluripotent stem cell (iPSC-CMs) requires accurate assessment of contractile function. Micropatterning iPSC-CMs on elastic substrates controls cell shape and alignment to enable contractile studies, but the determinants of intrinsic variability in this system have been incompletely characterized. The primary objective of this study was to determine the impact of myofibrillar structure on contractile function in iPSC-CMs. After labeling micropatterned iPSC-CMs with a cell permeant F-actin dye, we imaged both myofibrillar structure and contractile function. Using automated myofibrillar image analysis, we demonstrate that myofibrillar abundance is widely variable among individual iPSC-CMs and strongly correlates with contractile function. This variability is not reduced by subcloning from single iPSCs to reduce genetic heterogeneity, persists with two different iPSC-CM purification methods, and similarly is present for embryonic stem cell-derived cardiomyocytes. This analysis provides compelling evidence that myofibrillar structure should be quantified and controlled for in studies investigating contractile function in iPSC-CMs.

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