Modeling nonlinear dynamic properties of dielectric elastomers with various crosslinks, entanglements, and finite deformations

2018 ◽  
Vol 123 (8) ◽  
pp. 084901 ◽  
Author(s):  
Junshi Zhang ◽  
Hualing Chen ◽  
Dichen Li
Keyword(s):  
Nonlinear Dynamic ◽  
Dynamic Properties ◽  
Finite Deformations ◽  
Dielectric Elastomers ◽  
Nonlinear Dynamic Properties

Nonlinear Dynamic Properties of the Pancreas and Liver

1973 ◽  
Vol 6 (4) ◽  
pp. 503-508
Author(s):  
Richard N. Bergman ◽  
Richard J. Bucolo
Keyword(s):  
Nonlinear Dynamic ◽  
Dynamic Properties ◽  
Nonlinear Dynamic Properties

scholarly journals Effect of carbonation on the linear and nonlinear dynamic properties of cement-based materials

2015 ◽  
Vol 55 (1) ◽  
pp. 011004 ◽  
Author(s):  
Jesus N. Eiras ◽  
Tribikram Kundu ◽  
John S. Popovics ◽  
José Monzó ◽  
María V. Borrachero ◽  
...  
Keyword(s):  
Nonlinear Dynamic ◽  
Dynamic Properties ◽  
Cement Based Materials ◽  
Linear And Nonlinear ◽  
Nonlinear Dynamic Properties

scholarly journals Nonlinear dynamic properties of silty clay from Warsaw area

2016 ◽  
Vol 48 (3) ◽  
pp. 201-220
Author(s):  
Wojciech Sas ◽  
Katarzyna Gabryś ◽  
Emil Soból ◽  
Alojzy Szymański
Keyword(s):  
Shear Modulus ◽  
Shear Strain ◽  
Nonlinear Dynamic ◽  
Dynamic Properties ◽  
Small Strain ◽  
Silty Clay ◽  
Resonant Column ◽  
Material Damping ◽  
Nonlinear Dynamic Properties ◽  
Low Amplitude

Abstract In this work, the small-strain and nonlinear dynamic properties of silty clay samples were studied by means of the low- and high-amplitude resonant column (RC) tests at various mean effective stresses (p’). The tested specimens were collected from the centre of Warsaw, district Śródmieście. Initially, the low-amplitude tests (below 0.001%) were conducted. Subsequently, the nonlinear testing was performed, at shearing strains greater than 0.001%. These tests were carried out in order to receive the dynamic properties of silty clay specimens in the nonlinear shear strain range. The small-strain material damping ratios (Dmin) of silty clay samples were also measured during the low-amplitude resonant column testing. The results show that increasing shear strain (γ) above the elastic threshold (γte) causes a decrease of the shear modulus (G) and normalized shear modulus (G/Gmax) of analyzed soil samples. Simultaneously, it is observed a increase of its damping ratio (D) and normalized damping (D/Dmin) with increasing shear strain (γ). Predictive equations for estimating normalized shear modulus and material damping of silty clay soils were presented here as well. The equations are based on a modified hyperbolic model and a statistical analysis of the RC tests results. The influence of unloading process on dynamic properties of the tested material was also discussed in the paper.

Nonlinear Dynamic Properties of Two-Dimensional Arrays of Magnetic Nanodots

2015 ◽  
pp. 97-116 ◽  
Author(s):  
Yuri Kobljanskyj ◽  
Denys Slobodianiuk ◽  
Gennady Melkov ◽  
Konstantin Guslienko ◽  
Valentyn Novosad ◽  
...  
Keyword(s):  
Nonlinear Dynamic ◽  
Dynamic Properties ◽  
Two Dimensional ◽  
Magnetic Nanodots ◽  
Nonlinear Dynamic Properties

Chaos Properties of a Rotor System With Nonlinear Hydro-Static Bearings

2007 ◽  
Author(s):  
Changping Chen ◽  
Liming Dai
Keyword(s):  
Nonlinear Dynamic ◽  
Dynamic Properties ◽  
Nonlinear Behavior ◽  
Design Parameters ◽  
Rotating System ◽  
Rotating Speed ◽  
Highly Nonlinear ◽  
Mass Eccentricity ◽  
Nonlinear Dynamic Properties ◽  
Parameter Values

General motions of discs and shafts of large rotary machines appear with highly nonlinear behavior. The geometries of the shafts and the supporting systems of this machine can all be treated as nonlinear. This paper aims to investigate the chaos properties of the nonlinear rotating system. The nonlinear dynamic governing equations of the rotating bearing system are derived. The geometric nonlinearity of the shaft, nonlinear hydrostatic forces of the bearings, mass of the shaft and disc, deformation of the shaft and a disc mounted on the shaft, and the viscoelasticity of the supports are all taken into account. Numerical simulations are performed in the research for studying the bifurcation and chaos properties of the specified nonlinear rotating system. The effects of the shaft’s rotating speed and the mass eccentricity of the disc on the nonlinear dynamic properties of the system are investigated in detail. The results show that abundant of bifurcations and chaos exist in this nonlinear rotating system Corresponding to certain parameter values. The bifurcations and chaotic phenomena should be avoided when designing the rotating system by adjusting the design parameters. The results of this research can hereby be used for guiding the design and operation of rotor-bearing systems.

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