Ultrasound measurement of fiber orientation and tissue strain in excised myocardium under biaxial tension

2021 ◽  
Vol 150 (4) ◽  
pp. A290-A290
Author(s):  
John M. Cormack ◽  
Marc A. Simon ◽  
Kang Kim
Keyword(s):  
Fiber Orientation ◽  
Biaxial Tension ◽  
Ultrasound Measurement ◽  
Tissue Strain

scholarly journals Effect of the Distribution of Fiber Orientation on the Mechanical Properties of Silk Fibroin/Polycaprolactone Nanofiber Mats

2017 ◽  
Vol 12 (3) ◽  
pp. 155892501701200 ◽  
Author(s):  
Yunlei Yin ◽  
Jie Xiong
Keyword(s):  
Uniaxial Tension ◽  
Silk Fibroin ◽  
Fiber Orientation ◽  
Rotation Speed ◽  
Biaxial Tension ◽  
Mechanical Anisotropy ◽  
Distribution Analysis ◽  
Fiber Mats ◽  
Composite Nanofiber ◽  
Nanofiber Mats

In this study, Silk Fibroin (SF)/Polycaprolactone (PCL) composite nanofiber mats were fabricated using an electrostatic spinning technology employing different drum rotation speeds. The morphology and tensile performance of the resulting nanofiber mats were characterized using thermal field emission scanning electron microscopy, multi-layer image fusion technology, pore size distribution analysis and uniaxial and biaxial tensile tests. The analytical results showed that the drum rotation speed had little effect on the diameter of the nanofibers, but it did effect the physical orientation of the nanofibers. When the drum rotating speed was lower than 2.38 m s-1, the nanofibers were randomly distributed, and there was no obvious mechanical anisotropy in the fiber mats. However, when the rotation speed was as high as 11.88 m s-1, the nanofibers were fully uniaxially oriented, which provided high mechanical anisotropy to the fiber mats. The distribution of the size of the aperture of the nanofiber mats was related to the distribution in the fiber orientation. If the degree of orientation of the fibrous layer was high, the variation in the individual fibers was low and the pore diameter of fibrous mats was smaller as a result of the centralized fiber distribution. In the case of the SF/PCL composite nanofiber mats fabricated with different drum rotation speeds, the variation in the mechanical performance of the resulting mat in biaxial tension was consistent with its performance in uniaxial tension; however, it was found that the fracture mechanism of fiber mats varied in biaxial tension and uniaxial tension.

Comparison of Substructures Between Uniaxial and Biaxial Deformation in 1100-0 Aluminum

1981 ◽  
Vol 39 ◽  
pp. 52-53
Author(s):  
D. L. Rohr ◽  
S. S. Hecker
Keyword(s):  
Plastic Strain ◽  
Cell Walls ◽  
Room Temperature ◽  
Mechanical Response ◽  
Biaxial Tension ◽  
Initial Deformation ◽  
Uniaxial Deformation ◽  
Biaxial Deformation ◽  
Stress States ◽  
Comprehensive Study

As part of a comprehensive study of microstructural and mechanical response of metals to uniaxial and biaxial deformations, the development of substructure in 1100 A1 has been studied over a range of plastic strain for two stress states.Specimens of 1100 aluminum annealed at 350 C were tested in uniaxial (UT) and balanced biaxial tension (BBT) at room temperature to different strain levels. The biaxial specimens were produced by the in-plane punch stretching technique. Areas of known strain levels were prepared for TEM by lapping followed by jet electropolishing. All specimens were examined in a JEOL 200B run at 150 and 200 kV within 24 to 36 hours after testing.The development of the substructure with deformation is shown in Fig. 1 for both stress states. Initial deformation produces dislocation tangles, which form cell walls by 10% uniaxial deformation, and start to recover to form subgrains by 25%. The results of several hundred measurements of cell/subgrain sizes by a linear intercept technique are presented in Table I.

Development of On-line Fiber Orientation Meter Based on the Light Guide Effect

2004 ◽  
Vol 58 (2) ◽  
pp. 220-225
Author(s):  
Yuji Abe ◽  
Hidenobu Todoroki
Keyword(s):  
Fiber Orientation ◽  
Light Guide ◽  
On Line

Reproducibility of Heel Ultrasound Measurement in Prepubescent Children

2003 ◽  
Vol 22 (12) ◽  
pp. 1337-1340 ◽  
Author(s):  
Roger Martin Djoumessi Zebaze ◽  
Evelyn Brooks ◽  
Matthew High ◽  
Eileen Duty ◽  
Wendell Bronson
Keyword(s):  
Ultrasound Measurement ◽  
Heel Ultrasound

Fatigue response of Nafion® XL membrane in biaxial tension: Temperature effects

2021 ◽  
Author(s):  
Lei Su ◽  
Qing An ◽  
Jiejie Li ◽  
Lin Wang ◽  
Yuhang Zhang ◽  
...  
Keyword(s):  
Temperature Effects ◽  
Biaxial Tension

The role of brass texture on the deformation response of 7075-T651 aluminum alloy under equi-biaxial tension

2021 ◽  
pp. 141133
Author(s):  
Nedunchezhian Srinivasan ◽  
R. Velmurugan ◽  
Lalith Kumar Bhaskar ◽  
Satish Kumar Singh ◽  
Bhanu Pant ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Biaxial Tension ◽  
Deformation Response

Ultrasound measurement technique for the single-turn-coil magnets

2021 ◽  
Vol 92 (6) ◽  
pp. 063902
Author(s):  
T. Nomura ◽  
A. Hauspurg ◽  
D. I. Gorbunov ◽  
A. Miyata ◽  
E. Schulze ◽  
...  
Keyword(s):  
Measurement Technique ◽  
Ultrasound Measurement ◽  
Single Turn
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