scholarly journals Investigation of Shear-Induced Deformation of Reinforcing Textiles by Optical Measurement Devices

Materials ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1029 ◽  
Author(s):  
Stefan Rothe ◽  
Ellen Wendt ◽  
Sybille Krzywinski ◽  
Marianna Halász ◽  
Peter Bakonyi ◽  
...  
Keyword(s):  
Optical Measurement ◽  
Early Stage ◽  
Shear Angle ◽  
Test Stand ◽  
Reinforced Plastic ◽  
Material Behaviors ◽  
Fold Formation ◽  
Picture Frame ◽  
Picture Frame Test

When fiber-reinforced plastic (FRP) components are designed, it is very important to ensure that textiles are formed into complex 3D geometries without folds, and that the reinforcing structure is oriented appropriately. Most research in this context is focused on finite element (FE) forming simulations and the required characterization of textile reinforcements. However, the early stage of the design of FRPs, where kinematic draping simulations are used, is barely considered. In particular, the need for a critical shear angle for the execution and evaluation of kinematic draping simulations is often neglected. This paper presents an extended picture frame test stand with an optical device recording shear-induced deformations with the help of a laser line emitter. Associated hardware and software for detecting and quantifying the fold formation during a picture frame test were developed. With the additional recorded information, a material-specific critical shear angle can be determined, material behaviors can be compared, and FE-based simulation methods can be evaluated. This innovative test stand and the associated software tools will help engineers to decide on suitable materials and improve transparency in the early stages of the design process.

Characterization of the Initial Stage of Discharges between Micro-gap in Liquid using Optical Measurement

2010 ◽  
Vol 130 (4) ◽  
pp. 313-318
Author(s):  
Makoto Kanemaru ◽  
Shohei Sorimachi ◽  
Shinji Ibuka ◽  
Shozo Ishii
Keyword(s):  
Optical Measurement ◽  
Initial Stage

Exploring wall shear stress spatiotemporal heterogeneity in coronary arteries combining correlation-based analysis and complex networks with computational hemodynamics

2020 ◽  
Vol 234 (11) ◽  
pp. 1209-1222 ◽  
Author(s):  
Karol Calò ◽  
Giuseppe De Nisco ◽  
Diego Gallo ◽  
Claudio Chiastra ◽  
Ayla Hoogendoorn ◽  
...  
Keyword(s):  
Shear Stress ◽  
Wall Shear Stress ◽  
Complex Networks ◽  
Coronary Arteries ◽  
Early Stage ◽  
Flow Direction ◽  
Computational Hemodynamics ◽  
Time Histories ◽  
Wall Shear

Atherosclerosis at the early stage in coronary arteries has been associated with low cycle-average wall shear stress magnitude. However, parallel to the identification of an established active role for low wall shear stress in the onset/progression of the atherosclerotic disease, a weak association between lesions localization and low/oscillatory wall shear stress has been observed. In the attempt to fully identify the wall shear stress phenotype triggering early atherosclerosis in coronary arteries, this exploratory study aims at enriching the characterization of wall shear stress emerging features combining correlation-based analysis and complex networks theory with computational hemodynamics. The final goal is the characterization of the spatiotemporal and topological heterogeneity of wall shear stress waveforms along the cardiac cycle. In detail, here time-histories of wall shear stress magnitude and wall shear stress projection along the main flow direction and orthogonal to it (a measure of wall shear stress multidirectionality) are analyzed in a representative dataset of 10 left anterior descending pig coronary artery computational hemodynamics models. Among the main findings, we report that the proposed analysis quantitatively demonstrates that the model-specific inlet flow-rate shapes wall shear stress time-histories. Moreover, it emerges that a combined effect of low wall shear stress magnitude and of the shape of the wall shear stress–based descriptors time-histories could trigger atherosclerosis at its earliest stage. The findings of this work suggest for new experiments to provide a clearer determination of the wall shear stress phenotype which is at the basis of the so-called arterial hemodynamic risk hypothesis in coronary arteries.

scholarly journals Characterization of long non-coding RNA expression profiles in lymph node metastasis of early-stage cervical cancer

2016 ◽  
Vol 35 (6) ◽  
pp. 3185-3197 ◽  
Author(s):  
CHUNLIANG SHANG ◽  
WENHUI ZHU ◽  
TIANYU LIU ◽  
WEI WANG ◽  
GUANGXIN HUANG ◽  
...  
Keyword(s):  
Cervical Cancer ◽  
Lymph Node ◽  
Early Stage ◽  
Expression Profiles ◽  
Rna Expression ◽  
Node Metastasis ◽  
Non Coding Rna ◽  
Early Stage Cervical Cancer ◽  
Long Non Coding Rna

Characterization of Metabolic Activity Induced by Kainic Acid in Adult Rat Whole Brain at the Early Stage: A 18FDG-PET Study

2021 ◽  
pp. 147621
Author(s):  
Arturo Avendaño-Estrada ◽  
Camilo Rios ◽  
Iñigo Aguirre-Aranda ◽  
Miguel Ángel Ávila-Rodríguez ◽  
Joaquín Manjarrez-Marmolejo ◽  
...  
Keyword(s):  
Kainic Acid ◽  
Metabolic Activity ◽  
Early Stage ◽  
Whole Brain ◽  
Adult Rat ◽  
18Fdg Pet

Histological characterization of the early‐stage infection events of Setosphaeria turcica in maize

2021 ◽  
Author(s):  
Ya‐Li Fang ◽  
Yao‐Yao Zhou ◽  
Xin Li ◽  
Yue Gao ◽  
De‐Long Wang ◽  
...  
Keyword(s):  
Early Stage ◽  
Setosphaeria Turcica ◽  
Stage Infection

Flexural stiffness characterization of fiber reinforced plastic (FRP) pultruded beams

2007 ◽  
Vol 81 (2) ◽  
pp. 274-282 ◽  
Author(s):  
Almir Barros da S. Santos Neto ◽  
Henriette Lebre La Rovere
Keyword(s):  
Flexural Stiffness ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic
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