Simple shear deformation of sheet metals: finite strain perturbation analysis and high-resolution quasi-in-situ strain measurement

2021 ◽  
pp. 103194
Author(s):  
Guofeng Han ◽  
Ji He ◽  
Shuhui Li
Keyword(s):  
High Resolution ◽  
Shear Deformation ◽  
Simple Shear ◽  
Perturbation Analysis ◽  
Strain Measurement ◽  
Finite Strain ◽  
Sheet Metals ◽  
In Situ Strain Measurement ◽  
Simple Shear Deformation

Advanced measurement techniques for braided composite structures: A review of current and upcoming trends

2020 ◽  
Vol 54 (25) ◽  
pp. 3895-3917 ◽  
Author(s):  
Garrett W Melenka ◽  
Cagri Ayranci
Keyword(s):  
Computed Tomography ◽  
Strain Measurement ◽  
Composite Structures ◽  
Measurement Methods ◽  
Micro Computed Tomography ◽  
Braided Composites ◽  
Optical Strain Measurement ◽  
In Situ Strain Measurement ◽  
Optical Strain

Braiding is an advanced textile manufacturing method that is used to produce two-dimensional and three-dimensional components. Unlike laminated structures, braids have interlaced yarns that form a continuity between layers. This structure allows for improved impact resistance, damage tolerance, and improved through-thickness reinforcement. Despite the numerous advantages of braided composites, braids also have shortcomings. Their highly complex fiber architecture presents challenges in the availability and choice of the strain measuring and characterization techniques. Advanced measurement methods such as optical strain measurement, micro-computed tomography, and in situ strain measurement are required. Optical strain measurement methods such as digital image correlation and high-speed imaging are necessary to accurately measure the complex deformation and failure that braided composites exhibit. X-ray-based micro-computed tomography measurements can provide detailed geometric and morphologic information for braided structures, which is necessary for accurately predicting the mechanical properties of braided structures. Finally, in situ strain measurement methods will provide detailed information on the internal deformation and strain that exists within braided structures. In situ sensors will also allow for in-service health monitoring of braided structures. This paper provides a detailed review of the aforementioned sensing technologies and their relation to the measurement of braided composite structures.

Shear properties of passive ventricular myocardium

2002 ◽  
Vol 283 (6) ◽  
pp. H2650-H2659 ◽  
Author(s):  
Socrates Dokos ◽  
Bruce H. Smaill ◽  
Alistair A. Young ◽  
Ian J. LeGrice
Keyword(s):  
Shear Deformation ◽  
Simple Shear ◽  
Ventricular Myocardium ◽  
Left Ventricular ◽  
Shear Deformations ◽  
Shear Properties ◽  
Nonlinear Viscoelastic ◽  
Myocardial Layers ◽  
Shear Modes ◽  
Simple Shear Deformation

We examined the shear properties of passive ventricular myocardium in six pig hearts. Samples (3 × 3 × 3 mm) were cut from adjacent regions of the lateral left ventricular midwall, with sides aligned with the principal material axes. Four cycles of sinusoidal simple shear (maximum shear displacements of 0.1–0.5) were applied separately to each specimen in two orthogonal directions. Resulting forces along the three axes were measured. Three specimens from each heart were tested in different orientations to cover all six modes of simple shear deformation. Passive myocardium has nonlinear viscoelastic shear properties with reproducible, directionally dependent softening as strain is increased. Shear properties were clearly anisotropic with respect to the three principal material directions: passive ventricular myocardium is least resistant to simple shear displacements imposed in the plane of the myocardial layers and most resistant to shear deformations that produce extension of the myocyte axis. Comparison of results for the six different shear modes suggests that simple shear deformation is resisted by elastic elements aligned with the microstructural axes of the tissue.

In-situ strain measurement of ballistic fabrics during impact using fiber Bragg gratings

2020 ◽  
Vol 59 ◽  
pp. 102334
Author(s):  
D.A. Hackney ◽  
T. Goode ◽  
F. Seng ◽  
S. Schultz ◽  
M. Pankow ◽  
...  
Keyword(s):  
Strain Measurement ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
In Situ Strain Measurement

Twinning in pure Ti subjected to monotonic simple shear deformation

2012 ◽  
Vol 72 ◽  
pp. 24-36 ◽  
Author(s):  
W. Tirry ◽  
S. Bouvier ◽  
N. Benmhenni ◽  
W. Hammami ◽  
A.M. Habraken ◽  
...  
Keyword(s):  
Shear Deformation ◽  
Simple Shear ◽  
Simple Shear Deformation

Technical development of simple shear deformation experiments using a deformation-DIA apparatus

2010 ◽  
Vol 21 (5) ◽  
pp. 523-531 ◽  
Author(s):  
Tomohiro Ohuchi ◽  
Takaaki Kawazoe ◽  
Norimasa Nishiyama ◽  
Nishihara Yu ◽  
Tetsuo Irifune
Keyword(s):  
Shear Deformation ◽  
Simple Shear ◽  
Technical Development ◽  
Simple Shear Deformation

In Situ Strain Measurement in Solid-State Li-Ion Battery Electrodes

2020 ◽  
Author(s):  
Behrad Koohbor ◽  
Lingzi Sang ◽  
Omer Ozgur Capraz ◽  
Andrew Gewirth ◽  
Nancy Sottos
Keyword(s):  
Solid State ◽  
Strain Measurement ◽  
Li Ion Battery ◽  
Li Ion ◽  
In Situ Strain Measurement
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