Heat Source Processing for Localized Deformation with Non-Constant Thermal Conductivity. Application to Superelastic Tensile Tests of NiTi Shape Memory Alloys

Louche, Hervé; Schlosser, Pauline; Favier, Denis; Orgéas, Laurent

doi:10.1007/s11340-012-9607-3

Cited by 25 publications

(15 citation statements)

References 33 publications

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“…This case is similar to the exothermic heat source that occurs during stress induced phase transformation when loading (e.g. in tension) SMA sample [13,22]. In [13,22], the sample is initially at room temperature.…”

Section: Methodsmentioning

confidence: 84%

Numerical study on the effect of the paint layer used for infrared thermography on heat source estimation

Delobelle

Louche

Favier

2014

Quantitative InfraRed Thermography Journal

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International audienceThis paper investigates the effect of the paint layer used for infrared thermography on the heat source estimation for thin plates. The thermal behaviour of two plates is studied using finite element modelling. The first one is composed of the studied homogeneous material. The second one is a sandwich plate composed of a central material covered on each side with a high emissivity paint layer. For the two plates, two thermal loading cases are simulated. Case 1 corresponds to natural cooling from a initial uniform temperature to room temperature. Case 2 corresponds to a situation where the initial uniform temperature is equal to room temperature. In both cases, the central material is loaded with internal heat sources leading to temperature field variation. From the computed external surface temperature, heat sources and energy are then estimated using homogeneous plate and sandwich plate models derived from the heat diffusion equation. Then, the estimated heat sources are compared to the one input in the finite element model. It is shown that the paint layer significantly isolates the central material from the external environment. In case 1, it is shown that the error is reduced from 10% with the homogeneous plate model to 5%, with the sandwich plate model. In case 2, heat sources are estimated with an error of less than 8% with the homogeneous plate model while it is below 2% with the sandwich plate model. The sandwich plate model is thus significantly more accurate for heat source and energy estimations than the homogeneous plate model

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Section: Methodsmentioning

confidence: 84%

Numerical study on the effect of the paint layer used for infrared thermography on heat source estimation

Delobelle

Louche

Favier

2014

Quantitative InfraRed Thermography Journal

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“…This requires first describing the kinematic and the thermal fields in the same coordinate system. Several movement compensation techniques have been proposed in the case of elastomers: from infrared images only in Pottier et al, by coupling full infrared and displacement fields in Samaca Martinez et al It should be noted that such technique has also been developed for other materials; see for instance Chrysochoos et al and Bodelot et al for steel, or Louche et al for shape memory alloys. In this paper, coupled full thermal and kinematic fields measurements have been carried out on both sides of the specimen.…”

Section: Methodsmentioning

confidence: 99%

Inverse identification of constitutive parameters from heat source fields: A local approach applied to hyperelasticity

Charlès

Cam

2020

Strain

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In this paper, a new inverse identification method of constitutive parameters is developed from full kinematic and thermal field measurements. It consists in reconstructing the heat source field from two different approaches by using the heat diffusion equation. The first one requires the temperature field measurement and the value of the thermophysical parameters. The second one is based on the kinematic field measurement and the choice of a thermo‐hyperelastic model that contains the parameters to be identified. The identification is carried out at the local scale, ie, at any point of the heat source field, without using the boundary conditions. In the present work, the method is applied to the challenging case of hyperelasticity from a heterogeneous test. Due to large deformations undergone by the rubber specimen tested, a motion compensation technique is developed to plot the kinematic and the thermal fields at the same points before reconstructing the heterogeneous heat source field. In the present case, the constitutive parameter of the Neo‐Hookean model has been identified, and its distribution has been characterized with respect to the strain state at the surface of a cross‐shaped specimen.

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“…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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Heat Source Processing for Localized Deformation with Non-Constant Thermal Conductivity. Application to Superelastic Tensile Tests of NiTi Shape Memory Alloys

Cited by 25 publications

References 33 publications

Numerical study on the effect of the paint layer used for infrared thermography on heat source estimation

Numerical study on the effect of the paint layer used for infrared thermography on heat source estimation

Inverse identification of constitutive parameters from heat source fields: A local approach applied to hyperelasticity

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

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