Magnetic detection of high mechanical stress in iron-based materials using eddy currents and phase shift measurements

A computer model of the vocal fold was developed using finite element modeling technology for studying mechanical stress distribution over vibrating vocal fold tissue. In a simulated normal phonation mode, mechanical stress was found to be lowest at the midpoint of the vocal fold and highest at tendon attachments. However, when other modes predominated, high mechanical stress could occur at the midpoint of the vocal folds. When a vocal fold mass was modeled, high shearing stress occurred at the base of the modeled vocal fold mass, suggesting that the presence of a vocal nodule or polyp is associated with high mechanical stress at the margins of the mass. This finding supports a hypothesis that mechanical intraepithelial stress plays an important role in the development of vocal nodules, polyps, and other lesions that are usually ascribed to hyperfunctional dysphonia.

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Secondary ossification center induces and protects growth plate structure

eLife ◽

10.7554/elife.55212 ◽

2020 ◽

Vol 9 ◽

Author(s):

Meng Xie ◽

Pavel Gol'din ◽

Anna Nele Herdina ◽

Jordi Estefa ◽

Ekaterina V Medvedeva ◽

...

Keyword(s):

Mechanical Stress ◽

Growth Plate ◽

Hypertrophic Chondrocytes ◽

Ossification Center ◽

Anatomical Entity ◽

Terrestrial Environment ◽

Force Microscopy ◽

Atomic Force ◽

High Mechanical Stress ◽

Secondary Ossification Center

Growth plate and articular cartilage constitute a single anatomical entity early in development but later separate into two distinct structures by the secondary ossification center (SOC). The reason for such separation remains unknown. We found that evolutionarily SOC appears in animals conquering the land - amniotes. Analysis of the ossification pattern in mammals with specialized extremities (whales, bats, jerboa) revealed that SOC development correlates with the extent of mechanical loads. Mathematical modeling revealed that SOC reduces mechanical stress within the growth plate. Functional experiments revealed the high vulnerability of hypertrophic chondrocytes to mechanical stress and showed that SOC protects these cells from apoptosis caused by extensive loading. Atomic force microscopy showed that hypertrophic chondrocytes are the least mechanically stiff cells within the growth plate. Altogether, these findings suggest that SOC has evolved to protect the hypertrophic chondrocytes from the high mechanical stress encountered in the terrestrial environment.

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New nanocomposite protects from corrosion at high mechanical stress

Highlights ◽

10.4053/hi910-140611 ◽

2015 ◽

Keyword(s):

Mechanical Stress ◽

High Mechanical Stress

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The Effect of High Mechanical Stress on Certain Solid Explosives

Papers 122-168 ◽

10.4159/harvard.9780674287839.c38 ◽

2014 ◽

Keyword(s):

Mechanical Stress ◽

Solid Explosives ◽

High Mechanical Stress

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High mechanical stress applied to FD-SOI transistors using ultra-thin silicon membranes

2009 International Semiconductor Conference ◽

10.1109/smicnd.2009.5336598 ◽

2009 ◽

Author(s):

Bogdan Bercu ◽

Laurent Montes ◽

Florent Rochette ◽

Mireille Mouis ◽

Xu Xin ◽

...

Keyword(s):

Mechanical Stress ◽

Thin Silicon ◽

Silicon Membranes ◽

High Mechanical Stress

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Using Discrete Multiphysics Modelling to Assess the Effect of Calcification on Hemodynamic and Mechanical Deformation of Aortic Valve

ChemEngineering ◽

10.3390/chemengineering4030048 ◽

2020 ◽

Vol 4 (3) ◽

pp. 48 ◽

Cited By ~ 1

Author(s):

Adamu Musa Mohammed ◽

Mostapha Ariane ◽

Alessio Alexiadis

Keyword(s):

Cardiac Output ◽

Aortic Valve ◽

Mechanical Stress ◽

Flow Rate ◽

Critical Level ◽

Mechanical Deformation ◽

Multiphysics Modelling ◽

High Mechanical Stress ◽

Severe Calcification

This study proposes a 3D particle-based (discrete) multiphysics approach for modelling calcification in the aortic valve. Different stages of calcification (from mild to severe) were simulated, and their effects on the cardiac output were assessed. The cardiac flow rate decreases with the level of calcification. In particular, there is a critical level of calcification below which the flow rate decreases dramatically. Mechanical stress on the membrane is also calculated. The results show that, as calcification progresses, spots of high mechanical stress appear. Firstly, they concentrate in the regions connecting two leaflets; when severe calcification is reached, then they extend to the area at the basis of the valve.

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Parameters Varation of Electronic Components in Fuze under High Stress Fields

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.34-35.1328 ◽

2010 ◽

Vol 34-35 ◽

pp. 1328-1332

Author(s):

Bo Li ◽

Hong Xiang Zhang ◽

Ya Zhang

Keyword(s):

High Temperature ◽

Mechanical Stress ◽

Dynamic Testing ◽

Carbon Film ◽

High Stress ◽

Reference Value ◽

Stress Fields ◽

Test Scheme ◽

Small Range ◽

High Mechanical Stress

Dynamic testing experiments and test scheme are carried out to testing the parameter varation of typical carbon film resistors and ceramic capacitors of Fuze under high stress fields—high temperature and high mechanical stress overloading, and the changing law of the components parameter are got in high stress fields, then parameter of components instant instable motion under high mechanical stress overloading is discussed by analyzing experimental results, and found out parameters approximate linear in small range in 25°C～125°C, of nonlinear in large range in the very high temperature of 125°C～350°C conditions, which can offer some reference value to prolong lifetime of military electron device.

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