Identification of a microstructural model for steels subjected to large tensile and/or simple shear deformations

2001 ◽  
Vol 11 (PR4) ◽  
pp. Pr4-329-Pr4-337 ◽  
Author(s):  
H. Haddadi ◽  
S. Bouvier ◽  
P. Levée
Keyword(s):  
Simple Shear ◽  
Shear Deformations ◽  
Microstructural Model

scholarly journals Correction: Transition rates for slip-avalanches in soft athermal disks under quasi-static simple shear deformations

Soft Matter ◽  
2019 ◽  
Vol 15 (17) ◽  
pp. 3627-3627 ◽  
Author(s):  
Kuniyasu Saitoh ◽  
Norihiro Oyama ◽  
Fumiko Ogushi ◽  
Stefan Luding
Keyword(s):  
Simple Shear ◽  
Soft Matter ◽  
Transition Rates ◽  
Shear Deformations

Correction for ‘Transition rates for slip-avalanches in soft athermal disks under quasi-static simple shear deformations’ by Kuniyasu Saitoh et al., Soft Matter, 2019, DOI: 10.1039/c8sm01966e.

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.

On classical solutions of the Prandtl-Reuss equations of perfect elastoplasticity

1996 ◽  
Vol 126 (6) ◽  
pp. 1297-1308 ◽  
Author(s):  
Sergej B. Kuksin
Keyword(s):  
Simple Shear ◽  
Functional Equations ◽  
Classical Solutions ◽  
Antiplane Deformation ◽  
System Of Equations ◽  
Elastoplastic Medium ◽  
Shear Deformations ◽  
Nonlinear Functional

We study the elasticity domain for an antiplane deformation of a perfect elastoplastic medium, which is described by the Prandtl-Reuss equations. We prove that a boundary of this domain can be found by solving a system of nonlinear functional equations. In the simplest case of simple shear deformations, this system of equations is studied in detail.

Material Properties of the Axillary Pouch of the Glenohumeral Capsule: Is Isotropic Material Symmetry Appropriate?

2009 ◽  
Vol 131 (3) ◽  
Author(s):  
Eric J. Rainis ◽  
Steve A. Maas ◽  
Heath B. Henninger ◽  
Patrick J. McMahon ◽  
Jeffrey A. Weiss ◽  
...  
Keyword(s):  
Constitutive Model ◽  
Simple Shear ◽  
Material Properties ◽  
Isotropic Material ◽  
Tissue Sample ◽  
Shear Loading ◽  
Material Symmetry ◽  
Shear Deformations ◽  
Experimental Conditions ◽  
Glenohumeral Capsule

Inconclusive findings regarding the collagen fiber architecture and the material properties of the glenohumeral capsule make it unclear whether the material symmetry of the glenohumeral capsule is isotropic or anisotropic. The overall objective of this work was to use a combined experimental and computational protocol to characterize the mechanical properties of the axillary pouch of the glenohumeral capsule and to determine the appropriate material symmetry. Two perpendicular tensile and finite simple shear deformations were applied to a series of tissue samples from the axillary pouch of the glenohumeral capsule. An inverse finite element optimization routine was then used to determine the material coefficients for an isotropic hyperelastic constitutive model by simulating the experimental conditions. There were no significant differences between the material coefficients obtained from the two perpendicular tensile deformations or finite simple shear deformations. Furthermore, stress-stretch relationships predicted by utilizing the material coefficients from one direction were able to predict the responses of the same tissue sample in the perpendicular direction. These similarities between the longitudinal and transverse material behaviors of the tissue imply that the capsule may be considered an isotropic material. However, differences did exist between the material coefficients obtained from the tensile and shear loading conditions. Therefore, a more advanced constitutive model is needed to predict both the tensile and shear responses of the material.

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