Proposition of an uncoupled approach for the identification of cyclic heat sources from temperature fields in the presence of large strains

Glanowski, Thomas; Saux, V. Le; Doudard, Cédric; Marco, Yann; Champy, C.; Charrier, Pierre

doi:10.1007/s00161-017-0572-z

Cited by 3 publications

(3 citation statements)

References 31 publications

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“…Figure 5 presents the maximum heat build-up measured by an infrared pyrometer at the skin during the fatigue tests. A maximum value of 8°C is observed, leading to a maximum heat build-up at the core evaluated to 10°C [17,24].…”

Section: Test Proceduresmentioning

confidence: 98%

Fatigue of crystallizable rubber: Generation of a Haigh diagram over a wide range of positive load ratios

Champy

Saux

Marco

et al. 2021

International Journal of Fatigue

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A Haigh diagram is built for a carbon black filled rubber blend that exhibits Strain Induced Crystallization (SIC) for a wide range of positive displacement ratios. A strategy for the initiation detection, which becomes difficult for high displacement ratios, is proposed and validated thanks to regular visual follow-up. Some experimental cautions are taken to avoid any temperature and strain rate effects on the results, more specifically on the strain induced crystallization phenomenon. It is found that a reinforcement related to strain induced crystallization is present for load ratios (up to displacement load ratio of 0.35). For higher load ratios, the reinforcement effect reduces leading to a Haigh diagram that looks like a bell, as already shown by Cadwell et al.

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Section: Test Proceduresmentioning

confidence: 98%

Fatigue of crystallizable rubber: Generation of a Haigh diagram over a wide range of positive load ratios

Champy

Saux

Marco

et al. 2021

International Journal of Fatigue

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“…Moreover, Masquelier et al [25] illustrated the ability of this approach to give a good correlation between the experimental and simulated fields. The parameters of this model are identified on the AE2 sample [28]. We are using this energetic model in order to evaluate the dissipated energy of this inclusions numerically.…”

Section: Comparison Of the Infrared Measurement With The Simulationmentioning

confidence: 99%

Fatigue initiation mechanisms in elastomers: a microtomography-based analysis

et al. 2018

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The fatigue properties of filled elastomers are strongly related to the population of inclusionsinduced by their complex recipes and mixing/injection processes. The description and the understanding of the basic damage and dissipation mechanisms involved around these inclusions, the influence of their nature, geometry, size, interface and cohesion properties are especially important to optimize the fatigue design of industrial compounds and parts. The objective of the study is to take advantages of tomography observations to characterize the effects of the 3D inclusions on the fatigue resistance of rubber filled with carbon black. An images processing is necessary to dissociate accurately the inclusions of the matrix. The three dimensional observations provide many information on the inclusion’s morphology (size, shape) and their spatial distribution. Moreover, the proposed images processing allows detecting cracks inside and on the surface of the specimen, which offers a better insight on the early stages of the fatigue damage scenario. Then, a numerical model and thermo-mechanical measurements are used to understand why some inclusions become initiation sites. Finally, one activated site is fully described as example.

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“…Carleo et al [ 22 ] stated that, over the range of strains and strain rates that rubber-based automotive components are expected to operate in, the filled vulcanized elastomers exhibit strong nonlinearity and large hysteresis. Further possibilities for identifying parameters are, apart from the FEM, used by Gil-Negrete et al [ 23 ], and the evaluation of measured temperature fields has been done by Balandraud et al [ 24 ], Marco et al [ 25 ] and Glanowski et al [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Advanced Characterisation of Soft Polymers under Cyclic Loading in Context of Engine Mounts

et al. 2022

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The experimental investigation of viscoelastic behavior of cyclically loaded elastomeric components with respect to the time and the frequency domain is critical for industrial applications. Moreover, the validation of this behavior through numerical simulations as part of the concept of virtual prototypes is equally important. Experiments, combined measurements and test setups for samples as well as for rubber-metal components are presented and evaluated with regard to their industrial application. For application in electric vehicles with relevant excitation frequencies substantially higher than by conventional drive trains, high-frequency dynamic stiffness measurements are performed up to 3000 Hz on a newly developed test bench for elastomeric samples and components. The new test bench is compared with the standard dynamic measurement method for characterization of soft polymers. A significant difference between the measured dynamic stiffness values, caused by internal resonance of the bushing, is presented. This effect has a direct impact on the acoustic behavior of the vehicle and goes undetected by conventional measurement methods due to their lower frequency range. Furthermore, for application in vehicles with internal combustion engine, where the mechanical excitation amplitudes are significantly larger than by vehicles with electric engines, a new concept for the identification of viscoelastic material parameters that is suitable for the representation of large periodic deformations under consideration of energy dissipation is described. This dissipated energy causes self-heating of the polymer and leads to the precocious aging and failure of the elastomeric component. The validation of this concept is carried out thermally and mechanically on specimen and component level. Using the approaches developed in this work, the behavior of cyclically loaded elastomeric engine mounts in different applications can be simulated to reduce the time spent and save on the costs necessary for the production of prototypes.

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Proposition of an uncoupled approach for the identification of cyclic heat sources from temperature fields in the presence of large strains

Cited by 3 publications

References 31 publications

Fatigue of crystallizable rubber: Generation of a Haigh diagram over a wide range of positive load ratios

Fatigue of crystallizable rubber: Generation of a Haigh diagram over a wide range of positive load ratios

Fatigue initiation mechanisms in elastomers: a microtomography-based analysis

Advanced Characterisation of Soft Polymers under Cyclic Loading in Context of Engine Mounts

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