Characterization of the mechanical dissipation in shape-memory alloys during stress-induced phase transformation

Bubulinca, Constantin; Balandraud, Xavier; Grédiac, Michel; Stanciu, Sergiu; Abrudeanu, Mărioara

doi:10.1007/s10853-013-7751-5

Cited by 11 publications

(12 citation statements)

References 31 publications

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“…The application to rubber is typical of the relevance of the approach in studying various material responses: [12][13][14][15][16][17] thermoelastic coupling, entropic coupling, thermoelastic inversion, the effect of reinforcement by fillers, strain-induced crystallization, and the Mullins effect. The 0D approach has been also applied to study the thermomechanical response of SMAs under cyclic loading, [7,[18][19][20][21][22] as well as polyamide 6.6, [23][24][25][26][27] aluminum alloy, [28] and steel. [29] However, a difficulty arises for the estimation of mechanical dissipation in the case of long-term cyclic tests: The results are easily skewed by any change in the specimen's environment, such as the ambient air, the grips of the testing machine, and more generally, all the components of the testing room.…”

Section: Introductionmentioning

confidence: 99%

A specific device for enhanced measurement of mechanical dissipation in specimens subjected to long‐term tensile tests in fatigue

Delpueyo

Balandraud

Grédiac

et al. 2017

Strain

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This paper presents a calorimetric approach to the measurement of mechanical dissipation in specimens subjected to cyclic tensile tests. Mechanical dissipation, that is, the heat power produced by the material due to mechanical irreversibility, can potentially be deduced from the temperature changes captured on the specimen surface by infrared thermography. However, a difficulty arises for long-term cyclic tests: Results are easily skewed by any change in the specimen's environment. The problem is amplified by the fact that mechanical dissipation is in general small compared to the heat sources associated with thermomechanical couplings, making its estimation difficult. The paper proposes a simple procedure to extract a well-resolved estimation of mechanical dissipation by solving two key points specific to long-term cyclic tests: (a) the reduction of the parasitic effects associated with changes in the specimen's environment by using a specific device based on two references samples and (b) the choice of relevant thermal data acquisition parameters. A test is performed on a copper-based shape-memory alloy whose calorific response comprises three origins of heat sources: thermoelastic coupling, phase transformation, and mechanical irreversibility. The results obtained demonstrate the relevancy of the approach in extracting mechanical dissipation from the thermal response of the specimen subjected to long-term tensile tests in fatigue.

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Section: Introductionmentioning

confidence: 99%

A specific device for enhanced measurement of mechanical dissipation in specimens subjected to long‐term tensile tests in fatigue

Delpueyo

Balandraud

Grédiac

et al. 2017

Strain

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“…Each value W i we calculated at certain strains by using eq. (5). The values ∂ 2 T/∂x 2 were obtained from T(x) curve approximation by a quadratic polynomial.…”

Section: S547mentioning

confidence: 99%

“…In a number of papers [1][2][3][4] the studies of evolved heat variation relative to plastic deformation energy was subjected. Dissipated energy in shape-memory alloys Cu-Zn-Al, Ni-Ti, Cu-Al-Be, Ti-4.2Al-1.6Mn was studied under cyclic loading [5][6][7][8]. The investigations of materials deforming with serrated flow appearance accompanied by the nucleation of Portevin-Le Chatelier bands are subjected in several works [6,[9][10][11].…”

Section: Introductionmentioning

confidence: 99%

The variation of storage and heat energy in AISI 304 under plastic deformation

Lunev

Nadezhkin

2019

THERM SCI

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The results of the analysis of heat and stored energy variation in stainless steel AISI 304 under tension are presented in this work. The distributions of temperature and strain on the surface of specimens have been obtained by using infrared thermography and the digital image correlation of laser speckle patterns techniques. It has been found that the plastic flow diagram consists of two linear stages. The first one is characterized by the monotonic growth in evolved heat. At the second linear stage the portion of stored energy rises, that is connected with the growth in the rate of martensitic transformations. A temperature fluctuation in the center of a specimen at the true strain over 0.4 appears due to the motion of localized strain bands, which are also the sources of heat.

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“…In this case, a zero-dimensional (0D) formulation of the heat diffusion equation can be used. This approach has been successfully applied to rubbers [19][20][21][22][23][24][25], shape memory alloys [26][27][28][29][30][31][32], polyamide 6.6 [33][34][35][36][37], PMMA [38], aluminum alloy [39], steel [40] and copper [38,41]. To the best of the authors' knowledge, heat source calculations have never been performed for leathers.…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical characterization of leathers under tension using infrared thermography

et al. 2018

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Leather materials are subjected to various deformation states during their elaboration and their use as a final product. Although the mechanical response of leathers under tension has been studied in the literature for decades, scarce information is available on the nature of their elasticity and more generally on their thermomechanical behavior. In the present study, four leathers were tested under uniaxial loading conditions while temperature changes were measured at the specimen surface using infrared thermography. Two types of tests were performed at constant ambient temperature: monotonous displacement-controlled tests until failure and cyclic load-unload tests with increasing amplitudes. The heat sources at the origin of the temperature changes were also determined by using a version of the heat diffusion equation applicable to homogeneous tests. Results enabled us to discuss the nature of thermoelastic couplings in leathers. Intrinsic dissipation caused by mechanical irreversibility was also detected and quantified. Distinct responses are evidenced depending on the type of leather tested.

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Characterization of the mechanical dissipation in shape-memory alloys during stress-induced phase transformation

Cited by 11 publications

References 31 publications

A specific device for enhanced measurement of mechanical dissipation in specimens subjected to long‐term tensile tests in fatigue

A specific device for enhanced measurement of mechanical dissipation in specimens subjected to long‐term tensile tests in fatigue

The variation of storage and heat energy in AISI 304 under plastic deformation

Thermomechanical characterization of leathers under tension using infrared thermography

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