A Novel Maximum Resolved Shear Stress Gradient Criterion and Its Application for Crack Deflection Behavior in Polycrystalline Silicon Materials

2021 ◽  
Author(s):  
Yangbo Zhang ◽  
Qida Liu ◽  
Qun Li ◽  
Yangdong Ni ◽  
Yuanjie Yu ◽  
...  
Keyword(s):  
Shear Stress ◽  
Polycrystalline Silicon ◽  
Stress Gradient ◽  
Crack Deflection ◽  
Silicon Materials ◽  
Shear Stress Gradient

Numerical Investigation and Prediction of Atherogenic Sites in Branching Arteries

1995 ◽  
Vol 117 (3) ◽  
pp. 350-357 ◽  
Author(s):  
M. Lei ◽  
C. Kleinstreuer ◽  
G. A. Truskey
Keyword(s):  
Shear Stress ◽  
Wall Shear Stress ◽  
Blood Vessels ◽  
Vector Fields ◽  
Stress Gradient ◽  
Western World ◽  
Medium Size ◽  
Wall Shear Stress Gradient ◽  
Shear Stress Gradient ◽  
Wall Shear

Atherosclerosis, a disease of large- and medium-size arteries, is the chief cause of death in the US and most of the western world. It is widely accepted that the focal nature of the disease in arterial bends, junctions, and bifurcations is directly related to locally abnormal hemodynamics, often labeled “disturbed flows.” Employing the aorto-celiac junction of rabbits as a representative atherosclerotic model and considering other branching blood vessels with their distinctive input wave forms, it is suggested that the local wall shear stress gradient (WSSG) is the single best indicator of nonuniform flow fields leading to atherogenesis. Alternative predictors of susceptible sites are briefly evaluated. The results discussed include transient velocity vector fields, wall shear stress gradient distributions, and a new dimensionless parameter for the prediction of the probable sites of stenotic developments in branching blood vessels. Some of the possible underlying biological aspects of atherogenesis due to locally significant |WSSG|-magnitudes are briefly discussed.

Responses of human adipose-derived stem cells to interstitial level of extremely low shear flows regarding differentiation, morphology, and proliferation

Lab on a Chip ◽  
2017 ◽  
Vol 17 (12) ◽  
pp. 2115-2124 ◽  
Author(s):  
Sung-Hwan Kim ◽  
Kihoon Ahn ◽  
Joong Yull Park
Keyword(s):  
Stem Cells ◽  
Shear Stress ◽  
Shear Flow ◽  
Shear Flows ◽  
Stress Gradient ◽  
Adipose Derived Stem Cells ◽  
Shear Stress Gradient ◽  
Low Shear

We developed a shear stress-gradient chip, which mimickedin vivointerstitial level of flow. With this system, hASCs' quantitative responses to the interstitial level of shear flow are identified.

Shear stress gradient over endothelial cells in a curved microchannel system

Biorheology ◽  
1998 ◽  
Vol 35 (4-5) ◽  
pp. 245-261 ◽  
Author(s):  
M FRAME ◽  
G CHAPMAN ◽  
Y MAKINO ◽  
I SARELIUS
Keyword(s):  
Endothelial Cells ◽  
Shear Stress ◽  
Stress Gradient ◽  
Shear Stress Gradient
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