The Moire´ Method for Measuring Large Plane Deformations: General Theory and Application to Homogeneous Deformation

1969 ◽  
Vol 36 (3) ◽  
pp. 385-391 ◽  
Author(s):  
L. P. Martin ◽  
F. D. Ju
Keyword(s):  
General Theory ◽  
Shear Deformation ◽  
Simple Shear ◽  
Homogeneous Deformation ◽  
Angle Measurements ◽  
Moire Method ◽  
Simple Shear Deformation ◽  
Large Plane ◽  
Moiré Fringe ◽  
Plane Deformations

Moire´ fringe equations are developed for directly determining the components of Green’s and Conchy’s deformation tensors from fringe pitch and angle measurements. The equations are derived using the method of indicial representation of the specimen and master grid geometries. The master grid may be arbitrarily changed during the course of an experiment to obtain more easily measurable patterns. The results are specifically verified for the measurement of a large simple shear deformation.

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.

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
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