Determination of dissipated energy fields from temperature mappings on a rubber-like structural sample: Experiments and comparison to numerical simulations

Masquelier, Isaure; Marco, Yann; Saux, V. Le; Calloch, Sylvain; Charrier, Pierre

doi:10.1016/j.mechmat.2014.09.010

Cited by 18 publications

(16 citation statements)

References 23 publications

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“…Le Saux et al [27] showed the efficiency of this model to describe and predict the temperature and energy fields for various loading conditions of macroscopic samples. 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].…”

Section: Comparison Of the Infrared Measurement With The Simulationmentioning

confidence: 98%

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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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Section: Comparison Of the Infrared Measurement With The Simulationmentioning

confidence: 98%

“…The evaluation of the thermal sources from the temperature measurements requires solving the heat equation. The way to obtain the dissipated energy from the temperature is explain in another study [25].…”

Section: Experimental Toolmentioning

confidence: 99%

Fatigue initiation mechanisms in elastomers: a microtomography-based analysis

et al. 2018

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“…Here it is worthy to note that, except the method developed in the present study, there are also other kinds of displacement compensation methods that are adequate for performing the spatial alignment. The interested readers can be referred to the references [30][31][32]36,37] for detailed information.…”

Section: Technical Developmentmentioning

confidence: 99%

“…It allows both temperature and strain measurements on the same face of the specimen through a single IR camera [33][34][35]. In some studies [36,37] that employed only thermal field measurement, some dedicated motion compensation methods were developed for the displacement evaluation. In this work, an original two-face measurement technique is also developed, with a proper solution to the common problem of spatial coupling in the multifield measurement.…”

Section: Introductionmentioning

confidence: 99%

“…On the aspect of the application, the full-field measurements have been extensively applied to the mechanical testing and evaluation of the metallic materials and elastomers [30][31][32]36,37]. They show particular values in characterizing the heterogeneous deformation process of materials, which can be embodied both in the thermal and kinematic fields [38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

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Infrared thermography coupled with digital image correlation in studying plastic deformation on the mesoscale level

Wang

Witz

Bartali

et al. 2016

Optics and Lasers in Engineering

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Fast prediction of the fatigue behavior of short-fiber-reinforced thermoplastics based on heat build-up measurements: application to heterogeneous cases

Serrano

Marco

Saux

et al. 2017

Continuum Mech. Thermodyn.

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International audienceShort-fiber-reinforced thermoplastics components for structural applications are usually very complex parts as stiffeners, ribs and thickness variations are used to compensate the quite low material intrinsic stiffness. These complex geometries induce complex local mechanical fields but also complex microstructures due to the injection process. Accounting for these two aspects is crucial for the design in regard to fatigue of these parts, especially for automotive industry. The aim of this paper is to challenge an energetic approach, defined to evaluate quickly the fatigue lifetime, on three different heterogeneous cases: a classic dog-bone sample with a skin-core microstructure and two structural samples representative of the thickness variations observed for industrial components. First, a method to evaluate dissipated energy fields from thermal measurements is described and is applied to the three samples in order to relate the cyclic loading amplitude to the fields of cyclic dissipated energy. Then, a local analysis is detailed in order to link the energy dissipated at the failure location to the fatigue lifetime and to predict the fatigue curve from the thermomechanical response of one single sample. The predictions obtained for the three cases are compared successfully to the Wöhler curves obtained with classic fatigue tests. Finally, a discussion is proposed to compare results for the three samples in terms of dissipation fields and fatigue lifetime. This comparison illustrates that, if the approach is leading to a very relevant diagnosis on each case, the dissipated energy field is not giving a straightforward access to the lifetime cartography as the relation between fatigue failure and dissipated energy seems to be dependent on the local mechanical and microstructural state

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Determination of dissipated energy fields from temperature mappings on a rubber-like structural sample: Experiments and comparison to numerical simulations

Cited by 18 publications

References 23 publications

Fatigue initiation mechanisms in elastomers: a microtomography-based analysis

Fatigue initiation mechanisms in elastomers: a microtomography-based analysis

Infrared thermography coupled with digital image correlation in studying plastic deformation on the mesoscale level

Fast prediction of the fatigue behavior of short-fiber-reinforced thermoplastics based on heat build-up measurements: application to heterogeneous cases

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