Nonlinear Viscoelasticity of Sorbitan Tristearate Monolayers at Liquid/Gas Interface

Langmuir ◽  
2007 ◽  
Vol 23 (26) ◽  
pp. 12951-12958 ◽  
Author(s):  
Rema Krishnaswamy ◽  
Sayantan Majumdar ◽  
A. K. Sood
Keyword(s):  
Nonlinear Viscoelasticity ◽  
Sorbitan Tristearate

scholarly journals Finite Element Analysis for Nonlinear Unbonded Circular Fiber-Reinforced Elastomeric Bearings

2021 ◽  
Vol 5 (7) ◽  
pp. 170
Author(s):  
Pablo Castillo Ruano ◽  
Alfred Strauss
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Carbon Fiber ◽  
Seismic Isolation ◽  
Nonlinear Viscoelasticity ◽  
Fiber Reinforcement ◽  
Special Focus ◽  
Fiber Reinforced ◽  
Element Analysis ◽  
Elastomeric Bearings

In recent years, interest in low-cost seismic isolation systems has increased. The replacement of the steel reinforcement in conventional elastomeric bearings for a carbon fiber reinforcement is a possible solution and has garnered increasing attention. To investigate the response of fiber-reinforced elastomeric bearings (FREBs) under seismic loads, it is fundamental to understand its mechanical behavior under combined vertical and horizontal loads. An experimental investigation of the components presents complexities due to the high loads and displacements tested. The use of a finite element analysis can save time and resources by avoiding partially expensive experimental campaigns and by extending the number of geometries and topologies to be analyzed. In this work, a numerical model for carbon fiber-reinforced bearings is implemented, calibrated, and validated and a set of virtual experiments is designed to investigate the behavior of the bearings under combined compressive and lateral loading. Special focus is paid to detailed modeling of the constituent materials. The elastomeric matrix is modeled using a phenomenological rheological model based on the hyperelastic formulation developed by Yeoh and nonlinear viscoelasticity. The model aims to account for the hysteretic nonlinear hyper-viscoelastic behavior using a rheological formulation that takes into consideration hyperelasticity and nonlinear viscoelasticity and is calibrated using a series of experiments, including uniaxial tension tests, planar tests, and relaxation tests. Special interest is paid to capturing the energy dissipated in the unbonded fiber-reinforced elastomeric bearing in an accurate manner. The agreement between the numerical results and the experimental data is assessed, and the influence of parameters such as shape factor, aspect ratio, vertical pressure, and fiber reinforcement orientation on stress distribution in the bearings as well as in the mechanical properties is discussed.

Ageing effects on the linear and nonlinear viscoelasticity of bituminous binders

2021 ◽  
pp. 1-14
Author(s):  
Lucia Tsantilis ◽  
Shane B. Underwood ◽  
Fabrizio Miglietta ◽  
Pier Paolo Riviera ◽  
Orazio Baglieri ◽  
...  
Keyword(s):  
Nonlinear Viscoelasticity ◽  
Ageing Effects ◽  
Bituminous Binders ◽  
Linear And Nonlinear

Linear and Nonlinear Viscoelasticity of Semidilute Aqueous Mixtures of a Nonionic Cellulose Derivative and Ionic Surfactants

Langmuir ◽  
2001 ◽  
Vol 17 (26) ◽  
pp. 8001-8009 ◽  
Author(s):  
Reidar Lund ◽  
Rolf Andreas Lauten ◽  
Bo Nyström ◽  
Björn Lindman
Keyword(s):  
Nonlinear Viscoelasticity ◽  
Cellulose Derivative ◽  
Ionic Surfactants ◽  
Aqueous Mixtures ◽  
Linear And Nonlinear

On uniqueness and bifurcation in nonlinear viscoelasticity

1980 ◽  
Vol 72 (4) ◽  
pp. 303-313 ◽  
Author(s):  
Morton E. Gurtin ◽  
David W. Reynolds ◽  
Scott J. Spector
Keyword(s):  
Nonlinear Viscoelasticity

Effect of temporary network structure on linear and nonlinear viscoelasticity of polymer solutions

2015 ◽  
Vol 27 (2) ◽  
pp. 151-161 ◽  
Author(s):  
Kwang Soo Cho ◽  
Jae Woo Kim ◽  
Jung-Eun Bae ◽  
Ji Ho Youk ◽  
Hyun Jeong Jeon ◽  
...  
Keyword(s):  
Network Structure ◽  
Polymer Solutions ◽  
Nonlinear Viscoelasticity ◽  
Temporary Network ◽  
Linear And Nonlinear

Modeling Payne effect on basis of linearization of a visco-hyperelastic model

2021 ◽  
Author(s):  
Safia BOUZIDI ◽  
Hocine BECHIR
Keyword(s):  
Characteristic Property ◽  
Nonlinear Viscoelasticity ◽  
Loss Modulus ◽  
Dynamic Strain ◽  
Material Microstructure ◽  
Payne Effect ◽  
Proposed Model ◽  
Storage And Loss Moduli ◽  
Hyperelastic Model ◽  
Complex Young’S Modulus

Abstract The present work concerns the modeling of the Payne effect in nonlinear viscoelasticity. This effect is a characteristic property of filled elastomers. Indeed, under cyclic loading of increasing amplitude, a decrease is shown in the storage modulus and a peak in the loss modulus. In this study, the Payne effect is assumed to arise from a change of the material microstructure, i.e., the thixotropy. The so-called intrinsic time or shift time was inferred from solving a differential equation that represents the evolution of a material's microstructure. Then, the physical time is replaced by the shift time in the framework of a recent fractional visco-hyperelastic model, which was linearized in the neighborhood of a static pre-deformation. As a result, we have investigated the effects of static pre-deformation, frequency, and magnitude of dynamic strain on storage and loss moduli in the steady state. Thereafter, the same set of parameters identified from the complex Young's modulus was used to predict the stress in the pre-deformed configuration. Finally, it is demonstrated that the proposed model is reasonably accurate in predicting Payne effect.

Modeling nonlinear viscoelasticity in dynamic acoustoelasticity

2014 ◽  
Vol 105 (26) ◽  
pp. 264103 ◽  
Author(s):  
Chloé Trarieux ◽  
Samuel Callé ◽  
Hélène Moreschi ◽  
Guillaume Renaud ◽  
Marielle Defontaine
Keyword(s):  
Nonlinear Viscoelasticity
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