An investigation of the self-heating phenomenon in viscoelastic materials subjected to cyclic loadings accounting for prestress

Lima, Antônio Marcos Gonçalves de; Rade, Domingos A.; Lacerda, Helder Barbieri; Araújo, Cleudmar

doi:10.1016/j.ymssp.2014.12.006

Cited by 34 publications

(26 citation statements)

References 13 publications

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“…In general, the horizontal and vertical shift factors must be used for the description of viscoelastic materials [2]. However, there are not enough experimental data concerning the vertical shift factor of the viscoelastic material used in dampers (compare [8,9,11,13,[22][23][24]). However, if the viscoelastic material can be classified as a thermorheologically simple material, then only the horizontal shift factor is required [23].…”

Section: Influence Of Temperature On Viscoelastic Damper Parametersmentioning

confidence: 99%

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Approximate method for temperature-dependent characteristics of structures with viscoelastic dampers

Lewandowski

Przychodzki

2018

Arch Appl Mech

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A method for analyzing the influence of temperature on the dynamic characteristics of structures with viscoelastic dampers is proposed in this paper. Dampers which are described by so-called fractional rheological models are considered. The temperature-frequency superposition principle is used to describe the influence of temperature on the dynamic characteristics. The concept of continuous dependence of damping on an artificially introduced parameter is adopted for solving, in an approximate way, the nonlinear eigenvalue problem from which dynamic characteristics are determined. The correctness and effectiveness of the method was verified by means of two examples.

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Section: Influence Of Temperature On Viscoelastic Damper Parametersmentioning

confidence: 99%

“…This phenomenon, consisting in the rise in temperature due to energy dissipation in the viscoelastic material, has been the subject of numerous studies. A number of coupled thermal-mechanical models have been developed, which are described in [8][9][10][11][12].…”

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confidence: 99%

Approximate method for temperature-dependent characteristics of structures with viscoelastic dampers

Lewandowski

Przychodzki

2018

Arch Appl Mech

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“…However, when the viscoelastic materials are subjected to dynamic loads superimposed on static preloads, it is necessary to evaluate the Complex Modulus to describe this combined effect. Thus, based on the fact that the static and dynamic properties of linear viscoelastic materials can be measured independently of each other (Nashif et al, 1985), and taking into account the Frequency-Temperature Superposition Principle (FTSP), the Complex Modulus can be expressed as (de Lima et al, 2015):…”

Section: Modeling Of Viscoelastic Systems Using Commercial Fe Codesmentioning

confidence: 99%

“…If the material is subjected to cyclic stresses superimposed on static preloads,  , the heat generation term assumes the form (de Lima et al, 2015),…”

Section: Heat Generation Rate For Viscoelastic Materialsmentioning

confidence: 99%

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A Study of the Thermal Runaway Phase Generated During Cyclic Loading of Viscoelastic Materials Accounting for the Prestress

Rodovalho

Lima

Borges

et al. 2016

Lat. Am. j. solids struct.

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The good damping performance and inherent stability of viscoelastic materials in relatively broad frequency bands, besides cost effectiveness, offers many possibilities for practical engineering applications. However, for viscoelastic dampers subjected to dynamic loadings superimposed on static preloads, especially when good isolation characteristics are required at high frequencies, traditional design guidelines can lead to poor designs due to the rapidly increasing rate of temperature change inside the material. This paper is devoted to the numerical and experimental investigation in the degradation of the stiffness and capacity of a viscoelastic material induced by the thermal runaway phase, when it is subjected to dynamic and static loads simultaneously. After the theoretical background, the obtained results in terms of the temperature evolutions at different points within the volume of the material and the hysteresis loops for various static preloads are compared and the main features of the proposed study are highlighted.

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Constitutive modeling of polycarbonate over a wide range of strain rates and temperatures

Wang

Zhou

Huang

et al. 2016

Mech Time-Depend Mater

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The mechanical behavior of polycarbonate was experimentally investigated over a wide range of strain rates (10 −4 to 5 × 10 3 s −1 ) and temperatures (293 to 353 K). Compression tests under these conditions were performed using a SHIMADZU universal testing machine and a split Hopkinson pressure bar. Falling weight impact testing was carried out on an Instron Dynatup 9200 drop tower system. The rate-and temperature-dependent deformation behavior of polycarbonate was discussed in detail. Dynamic mechanical analysis (DMA) tests were utilized to observe the glass (α) transition and the secondary (β) transition of polycarbonate. The DMA results indicate that the α and β transitions have a dramatic influence on the mechanical behavior of polycarbonate. The decompose/shift/reconstruct (DSR) method was utilized to decompose the storage modulus into the α and β components and extrapolate the entire modulus, the α-component modulus and the β-component modulus. Based on three previous models, namely, Mulliken-Boyce, G'Sell-Jonas and DSGZ, an adiabatic model is proposed to predict the mechanical behavior of polycarbonate. The model considers the contributions of both the α and β transitions to the mechanical behavior, and it has been implemented in ABAQUS/Explicit through a user material subroutine VUMAT. The model predictions are proven to essentially coincide with the experimental results during compression testing and falling weight impact testing.

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An investigation of the self-heating phenomenon in viscoelastic materials subjected to cyclic loadings accounting for prestress

Cited by 34 publications

References 13 publications

Approximate method for temperature-dependent characteristics of structures with viscoelastic dampers

Approximate method for temperature-dependent characteristics of structures with viscoelastic dampers

A Study of the Thermal Runaway Phase Generated During Cyclic Loading of Viscoelastic Materials Accounting for the Prestress

Constitutive modeling of polycarbonate over a wide range of strain rates and temperatures

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