Nonlinear shear response of fluid polymers during periodic deformation. Basic harmonics

1978 ◽  
Vol 13 (6) ◽  
pp. 913-919
Author(s):  
M. G. Tsiprin
Keyword(s):  
Shear Response ◽  
Periodic Deformation ◽  
Nonlinear Shear

Nonlinear Shear Response and Anomalous Pressure Dependence of Viscosity in a Langmuir Monolayer

Langmuir ◽  
1997 ◽  
Vol 13 (19) ◽  
pp. 5137-5140 ◽  
Author(s):  
R. S. Ghaskadvi ◽  
J. B. Ketterson ◽  
P. Dutta
Keyword(s):  
Pressure Dependence ◽  
Langmuir Monolayer ◽  
Shear Response ◽  
Nonlinear Shear

Prediction of the Nonlinear Shear Response of the DBS

2016 ◽  
Vol 15 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Saeid Sabouri-Ghomi ◽  
Barash Payandehjoo
Keyword(s):  
Shear Response ◽  
Nonlinear Shear

Nonlinear Shear Response in (K,Na)NbO3-Based Lead-Free Piezoelectric Ceramics

2010 ◽  
Vol 445 ◽  
pp. 47-50 ◽  
Author(s):  
Manabu Hagiwara ◽  
Seita Takahashi ◽  
Takuya Hoshina ◽  
Hiroaki Takeda ◽  
Osamu Sakurai ◽  
...  
Keyword(s):  
Shear Strain ◽  
Laser Doppler ◽  
Lead Free ◽  
Piezoelectric Response ◽  
Shear Mode ◽  
Strong Nonlinearity ◽  
Laser Doppler Vibrometry ◽  
Shear Response ◽  
Operational Frequency ◽  
Nonlinear Shear

The piezoelectric shear response of 94.0(Ka0.5, Na0.5)NbO3 (KNN) + 5.0LiNbO3 (LN) + 0.5SrTiO3 (ST) + 0.5BiFeO3 (BF) ceramics was investigated by Laser Doppler Vibrometry (LDV) and resonance-antiresonance method. From resonance-antiresonance method, the piezoelectric d15 constant was obtained to be 273 pC/N. The shear strain obtained by LDV　at the frequency of 150kHz showed strong nonlinearity. This suggested that the domain contribution to piezoelectric response in shear mode of KNN-LN-ST-BF ceramics existed at the operational frequency for the shear mode divices.

Nanorheology of Confined Polymer Melts. 2. Nonlinear Shear Response at Strongly Adsorbing Surfaces

Langmuir ◽  
1994 ◽  
Vol 10 (10) ◽  
pp. 3867-3873 ◽  
Author(s):  
Steve Granick ◽  
Hsuan-Wei Hu ◽  
George A. Carson
Keyword(s):  
Polymer Melts ◽  
Shear Response ◽  
Confined Polymer ◽  
Nonlinear Shear

Relationships between linear and nonlinear shear response of polymer nano-composites

2012 ◽  
Vol 51 (11-12) ◽  
pp. 991-1005 ◽  
Author(s):  
Hojjat Mahi Hassanabadi ◽  
Denis Rodrigue
Keyword(s):  
Nano Composites ◽  
Shear Response ◽  
Linear And Nonlinear ◽  
Nonlinear Shear

scholarly journals A finite difference method for the static limit analysis of masonry domes under seismic loads

Meccanica ◽  
2021 ◽  
Author(s):  
Nicola A. Nodargi ◽  
Paolo Bisegna
Keyword(s):  
Stress State ◽  
Finite Difference ◽  
Finite Difference Method ◽  
Limit Analysis ◽  
Difference Method ◽  
Moment Tensor ◽  
Static Limit ◽  
Shear Response ◽  
Masonry Domes ◽  
Seismic Forces

AbstractThe static limit analysis of axially symmetric masonry domes subject to pseudo-static seismic forces is addressed. The stress state in the dome is represented by the shell stress resultants (normal-force tensor, bending-moment tensor, and shear-force vector) on the dome mid-surface. The classical differential equilibrium equations of shells are resorted to for imposing the equilibrium of the dome. Heyman’s assumptions of infinite compressive and vanishing tensile strength, alongside with cohesive-frictional shear response, are adopted for imposing the admissibility of the stress state. A finite difference method is proposed for the numerical discretization of the problem, based on the use of two staggered rectangular grids in the parameter space generating the dome mid-surface. The resulting discrete static limit analysis problem results to be a second-order cone programming problem, to be effectively solved by available convex optimization softwares. In addition to a convergence analysis, numerical simulations are presented, dealing with the parametric analysis of the collapse capacity under seismic forces of spherical and ogival domes with parameterized geometry. In particular, the influence that the shear response of masonry material and the distribution of horizontal forces along the height of the dome have on the collapse capacity is explored. The obtained results, that are new in the literature, show the computational merit of the proposed method, and quantitatively shed light on the seismic resistance of masonry domes.

An elastic phenomenological material law of technical textile with a nonlinear shear behaviour

2021 ◽  
pp. 073168442110058
Author(s):  
Dániel T Karádi ◽  
András A Sipos ◽  
Marianna Halász ◽  
Viktor Hliva ◽  
Dezső Hegyi
Keyword(s):  
Service Level ◽  
Shear Behaviour ◽  
Nonlinear Behaviour ◽  
Exponential Functions ◽  
Normal Stiffness ◽  
Material Parameters ◽  
Fitting Method ◽  
Highly Nonlinear ◽  
Nonlinear Shear ◽  
Magnitude Difference

In technical textile engineering, macro-level phenomenological modelling effectively describes the material’s highly nonlinear behaviour. However, existing material laws concentrate on the normal stiffness in the orthotropic yarns and simplify the shear effect because of the two orders of magnitude difference between shear and normal stiffness. This article introduces an improved phenomenological model that includes nonlinear shear behaviour, and it determines the material parameters with a previously applied data fitting method for exponential functions. The nonlinear shear behaviour is valid for the elastic state, that is, at the service level of the loads. Time-dependent, cyclic loading or plastic behaviour is not considered.

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