Constitutive modeling of the cyclic dissipation in thin and thick rubber specimens

Guo, Qiang; Zaïri, Fahmi; Ovalle, Cristian; Guo, Xinglin

doi:10.1002/zamm.201800087

Cited by 12 publications

(6 citation statements)

References 54 publications

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“…Besides, an important temperature in the centre of the notch root section was commonly associated with a low heat conductivity of polymers. Similar results, for filled rubbers, have been predicted by Ovalle et al [61,62,63], Behnke et al [64] and, more recently, by Guo et al [65].…”

Section: Nt Samplessupporting

confidence: 90%

Effects of stress triaxiality ratio on the heat build-up of polyamide 11 under loading

Ovalle

Boisot

Laiarinandrasana

2020

Mechanics of Materials

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Adiabatic heat build-up in polymers attributed to the conversion of plastic work into dissipative heat is a well known phenomenon. The temperature in the vicinity of a crack tip due to heat build-up may be exceptionally high so that it can locally reach the glass transition temperature T g , even though the ambient testing temperature is lower than T g . A significant alteration of the local material response and damage mechanisms is then induced. By simultaneous measurement of temperature during experimental tests under quasi-static loading and for a wide range of stress triaxiality ratios, a Gurson-Tvergaard-Needleman based thermo-mechanical constitutive model, integrating temperature-dependent coefficients, has been developed. Predictive capabilities of the proposed thermomechanical model to simulate the isothermal behaviour of PolyAmide 11 (PA11) have led to adiabatic simulations, to account for the heat build-up highlighted experimentally, of ductile crack extension. The model parameters were identified using experimental data obtained from PA11 samples with a given stress triaxiality ratio. Predicted evolutions given by the proposed constitutive model for other stress triaxiality ratios and geometries are found to be in good agreement with experimental data.

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Section: Nt Samplessupporting

confidence: 90%

Effects of stress triaxiality ratio on the heat build-up of polyamide 11 under loading

Ovalle

Boisot

Laiarinandrasana

2020

Mechanics of Materials

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“…The heat-insulating properties of the SBR matrix and the temperature rise within the rubber compound, as predicted by computer simulations play a key role in amplifying tensile residual strains [Guo et al. , 2018].…”

Section: Visco-hyperelastic Constitutive Equationsmentioning

confidence: 99%

Thermo-mechanical aging of carbon-black reinforced styrene-butadiene rubber under cyclic-loading

Dinari,

Benameur,

Khoshnaw

2024

MMMS

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PurposeThe research aims to investigate the impact of thermo-mechanical aging on SBR under cyclic-loading. By conducting experimental analyses and developing a 3D finite element analysis (FEA) model, it seeks to understand chemical and physical changes during aging processes. This research provides insights into nonlinear mechanical behavior, stress softening and microstructural alterations in SBR compounds, improving material performance and guiding future strategies.Design/methodology/approachThis study combines experimental analyses, including cyclic tensile loading, attenuated total reflection (ATR), spectroscopy and energy-dispersive X-ray spectroscopy (EDS) line scans, to investigate the effects of thermo-mechanical aging (TMA) on carbon-black (CB) reinforced styrene-butadiene rubber (SBR). It employs a 3D FEA model using the Abaqus/Implicit code to comprehend the nonlinear behavior and stress softening response, offering a holistic understanding of aging processes and mechanical behavior under cyclic-loading.FindingsThis study reveals significant insights into SBR behavior during thermo-mechanical aging. Findings include surface roughness variations, chemical alterations and microstructural changes. Notably, a partial recovery of stiffness was observed as a function of CB volume fraction. The developed 3D FEA model accurately depicts nonlinear behavior, stress softening and strain fields around CB particles in unstressed states, predicting hysteresis and energy dissipation in aged SBRs.Originality/valueThis research offers novel insights by comprehensively investigating the impact of thermo-mechanical aging on CB-reinforced-SBR. The fusion of experimental techniques with FEA simulations reveals time-dependent mechanical behavior and microstructural changes in SBR materials. The model serves as a valuable tool for predicting material responses under various conditions, advancing the design and engineering of SBR-based products across industries.

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“…The implementation has been done by means of a strain energy function subroutine (see Appendix 2). The reader interested in the details of the general implementation procedure can refer to [68, 69]. The SBR diabolo sample is taken for illustrative purpose.…”

Section: Heterogeneous Chemical Relaxationmentioning

confidence: 99%

“…3 A heterogeneous temperature distribution [68] would require accounting for a position-dependent oxygen diffusion through the material [33, 66]. …”

mentioning

confidence: 99%

Thermo-oxidative stress relaxation in carbon-filled SBR

Dinari

Zaïri

Chaabane

et al. 2021

Plastics, Rubber and Composites

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The thermo-oxidative stress relaxation in carbon-filled styrene-butadiene rubber is investigated using a two-step strategy consisting in homogeneous aging identification followed by heterogeneous aging prediction. Experimental observations of the chemical relaxation effects on the permanent deformation and on the equilibrium stiffness are reported on flat samples, containing various amounts of carbon-black fillers and aged at various temperatures and exposure times. The thermally activated degradation, implying scission-reformation mechanisms of links at a constant stretch at high temperature, is modelled from network decomposition under homogeneous aging conditions. An equivalent aging time, using the consumed oxygen across the thickness of bulk structures, is then introduced into the network alteration kinetics in order to predict the diffusionlimited oxidation effects on a bulk sample. Thanks to the model, the macroscopic chemical relaxation response and the heterogeneous damage patterns are discussed in connection to aging conditions and carbon-black filler content.

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Constitutive modeling of the cyclic dissipation in thin and thick rubber specimens

Cited by 12 publications

References 54 publications

Effects of stress triaxiality ratio on the heat build-up of polyamide 11 under loading

Effects of stress triaxiality ratio on the heat build-up of polyamide 11 under loading

Thermo-mechanical aging of carbon-black reinforced styrene-butadiene rubber under cyclic-loading

Thermo-oxidative stress relaxation in carbon-filled SBR

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