Journal ArticleDOI
Theoretical and Experimental Study of Viscoelastic Damper Based on Fractional Derivative Approach and Micromolecular Structures
TLDR
In this article, the theoretical and experimental studies of the viscoelastic damper are addressed, and the regular polyhedron chain network models for visco-elastic materials are proposed based on the molecular chain network microstructures and the temperature-frequency equivalent principle.Abstract:
Viscoelastic dampers are one of the most popular earthquake mitigation devices for building structures with a large number of applications in civil engineering. The seismic performance of viscoelastic dampers is greatly affected by viscoelastic materials. The present paper addresses the theoretical and experimental studies of the viscoelastic damper. The regular polyhedron chain network models for viscoelastic materials are proposed based on the molecular chain network microstructures and the temperature–frequency equivalent principle. Several dynamic property tests for the viscoelastic damper at different temperatures, frequencies, and displacements are carried out, and the proposed models are verified by comparing the numerical and experimental results. The comparisons show that the viscoelastic damper has perfect energy dissipation capacity, and the regular polyhedron chain network models can well describe the mechanical properties of the viscoelastic damper at different environmental temperatures and excitation frequencies.read more
Citations
More filters
Journal ArticleDOI
Typical dampers and energy harvesters based on characteristics of ferrofluids
TL;DR: In this article , a review of typical ferrofluid dampers and energy harvesting systems from the 1960s to the present is presented, focusing on TMFDs and vibration energy harvesters, and a novel magnetic fluid damper that achieves energy conversion and improves the efficiency of vibration attenuation.
Journal ArticleDOI
Mathematical modeling and test verification of viscoelastic materials considering microstructures and ambient temperature influence
TL;DR: In this article, a mathematical modeling of VEMs considering micro structures of viscoelastic materials (VEMs) is presented, which play an important role in their mechanical properties and energy dissipation capacities.
Journal ArticleDOI
Properties Tests and Mathematical Modeling of Viscoelastic Damper at Low Temperature With Fractional Order Derivative
TL;DR: In this paper, the seven-parameter fractional derivative model was modified with the temperature-frequency equivalent principle and utilized to describe the dynamic properties of the viscoelastic damper.
Journal ArticleDOI
Design parameters and material‐scale damage evolution of seismic upgraded RC frames by viscoelastic haunch bracing‐dampers
Journal ArticleDOI
Structural feasibility of incorporating the LVEM-isolated floor in the first story of a two-story steel frame
Yang Xiang,Yuji Koetaka +1 more
TL;DR: In this article, a floor-isolation system for mitigating the seismic responses of steel frames is proposed, where the floors are connected to steel beams by the laminated visco-elastic material (LVEM).
References
More filters
Book
Introduction to polymer viscoelasticity
TL;DR: Phenomenological treatment of Viscoelasticity Time--Temperature Correspondence Transitions and Relaxation in Amorphous Polymers Statistics of a Polymer Chain Rubber Elasticity Viscoelsastic Models Dielectric Relaxation Chemical Stress Relaxation Appendix References Answers to Problems List of Major Symbols Index
Journal ArticleDOI
The Dynamic Properties of Carbon Black-Loaded Natural Rubber Vulcanizates. Part I
TL;DR: In this article, the dynamic shear modulus at very high strains, (G∞), of carbon black filler loaded vulcanizates is regarded as due to the product of hydrodynamic interaction due to filler particles, and a second factor for which evidence is given suggesting that it arises from a few strong linkages which are known to link filler particles to the matrix.
Journal ArticleDOI
A theory of network alteration for the Mullins effect
TL;DR: In this paper, a new network alteration theory was proposed to describe the Mullins effect in rubber-like materials during cyclic loading by modifying the eight-chains constitutive equation of Arruda and Boyce (J. Mech. Phys. Solids 41 (2) (1993) 389).
Journal ArticleDOI
Large strain time-dependent behavior of filled elastomers
J.S. Bergström,Mary C. Boyce +1 more
TL;DR: In this paper, the effect of filler particles such as carbon black on the time-dependent, hysteretic stress-strain behavior of elastomers was investigated and a constitutive model for the behavior was decomposed into an equilibrium molecular network acting in parallel with a ratedependent network.