Dynamic characterization of elastomers and identification with rheological models

Petrone, Francesco; Lacagnina, Michele; Scionti, Marco

doi:10.1016/j.jsv.2003.02.001

Cited by 15 publications

(5 citation statements)

References 9 publications

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“…Two distinct measurement methodologies are described by international norms on how to determine the dynamic characteristics of elastomers [14], direct and indirect [15]. In the direct method, the elastomer is mounted direct to a load cell, exciting the elastomers, and a displacement or acceleration transducer measures the response.…”

Section: Dynamic Analysis Alternative Methodologiesmentioning

confidence: 99%

Dynamic characterization for the dielectric electroactive polymer fundamental sheet

Iskandarani

Karimi

2012

Int J Adv Manuf Technol

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A study into the appropriateness of characterizing the dynamics of the dielectric electroactive polymer (DEAP) fundamental sheet has been performed. Whereby a model describing the dynamics of the DEAP fundamental sheet is developed, parameters of the models are determined using experimental/simulation results, and verification has been conducted to determine the precision of the dynamic model. The precision for the DEAP sheet-obtained dynamic model could not be verified unless some parameters characterizing the material properties are found. For this purpose, a set of preparatory experiments are done in order to find the material properties "Young's modulus and damping". The testing for finding the material properties is requested before doing the dynamic analysis; both material characterization and dynamic analysis tests are performed using the developed testing rig which will be described in the paper. The results of this study highlight the dependency of the material dynamics on the mechanical fixture of the material, whereby the range of operation can be reduced to lower frequencies or expanded to higher frequencies when the mechanical fixture is designed for a certain application. The test results for the material show a relatively visible error between 0 and 20 Hz, but the error diverges after this range was stimulated when exceeding the natural frequency of the system, leading to nonstable state affecting the controllability of the actuated

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Section: Dynamic Analysis Alternative Methodologiesmentioning

confidence: 99%

Dynamic characterization for the dielectric electroactive polymer fundamental sheet

Iskandarani

Karimi

2012

Int J Adv Manuf Technol

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“…Several approaches exist to model vibration isolators 5,[26][27][28] . Here, it is modelled as a lumped massspring-mass system 5 as shown in Fig.…”

Section: Isolator Modelling and Structural Coupling Loss Factor Determentioning

confidence: 99%

“…Moreover, the static preload applied to the elastomer has an influence on the dynamics of the system. Other parameters influencing the stiffness measurement are the temperature and the relaxation phenomenon 26,30 . The measurement method presented in this paper assumes a linear vibration behaviour of the isolator for a given preload and temperature, and a point connection to the source and receiving structures.…”

Section: Measurement Of Isolator's Dynamic Stiffnessmentioning

confidence: 99%

Four-pole modelling of vibration isolators: Application to SEA of aircraft double-wall panels subjected to mechanical excitation

Campolina¹,

Atalla²,

Lanfranchi³

et al. 2012

Noise Control Eng. J.

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This paper aims at determining the structural coupling loss factor (CLF) between two plates connected via vibration isolators, using a four-pole approach. A hybrid Experimental-SEA (statistical energy analysis) model has been developed for predictions and two configurations are analysed. Configuration 1 is composed of two isotropic plates with critical frequencies around 3750 Hz and 6000 Hz. Configuration 2, more representative of an aircraft fuselage, is composed of a stiffened isotropic plate and a sandwich panel. Plates are coupled at 6 locations via elastomeric mounts. They are mechanically excited by a point force at random positions in the 100 to 10000 Hz frequency range. The modelling of the isolators integrates their frequency dependent measured stiffness. Four configurations are compared for the stiffness measurement and the most adapted setup is derived. The modelled CLFs are then compared with measurements using an experimental SEA approach. Finally, the spaceaveraged quadratic velocities of the plates are calculated using the hybrid model and compared with experiments. Results show a good correlation between predicted and measured CLFs but further refinement is needed in order to account for radiation coupling near the critical frequencies of the plates. V C 2012 Institute of Noise Control Engineering.

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“…Studies by many researchers have revealed the variation of mechanical properties of VE dampers with temperature and frequency [4,5]. Besides, when deformed, the molecular chain structure formed between internal molecular chains will be stretched, compressed, or even destroyed, thus exhibiting different configurations, and make the performance of VE material show a strong strain dependency [6,7].…”

Section: Introductionmentioning

confidence: 99%

Effects of mechanical nonlinearity of viscoelastic dampers on the seismic performance of viscoelasticlly damped structures

Dong

et al. 2021

Soil Dynamics and Earthquake Engineering

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Dynamic characterization of elastomers and identification with rheological models

Cited by 15 publications

References 9 publications

Dynamic characterization for the dielectric electroactive polymer fundamental sheet

Dynamic characterization for the dielectric electroactive polymer fundamental sheet

Four-pole modelling of vibration isolators: Application to SEA of aircraft double-wall panels subjected to mechanical excitation

Effects of mechanical nonlinearity of viscoelastic dampers on the seismic performance of viscoelasticlly damped structures

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