TY - JOUR
T1 - Thermomechanical characterization of stress localization in glass
T2 - An experimental and numerical study
AU - Corvec, Guillaume
AU - Robin, Éric
AU - Le Cam, Jean Benoît
AU - Lucas, Pierre
AU - Sangleboeuf, Jean Christophe
AU - Canevet, Frédéric
N1 - Publisher Copyright:
© 2017 John Wiley & Sons, Ltd
PY - 2017/8
Y1 - 2017/8
N2 - Thermoelastic stress analysis and quantitative calorimetry are full-field noncontact techniques widely used to study the thermomechanical behaviour of materials. The first one linearly relates the sum of the principal stresses to the temperature variation, and the second one can be used to measure the mechanical dissipation. However, brittle materials such as glass are a priori bad candidates for these techniques. Indeed, their low-temperature variations under loading lead to very noisy infrared images, and their brittle mechanical behaviour does not allow to deform them significantly. In the present paper, the thermomechanical characterization of a holed glass sample under cyclic loading is performed. A preliminary new filtering methodology has been applied to the thermal movie to remove the noise. The stress field obtained from the thermoelastic stress analysis is well correlated to the finite element model showing that this technique is adapted to study the thermoelastic response of brittle materials. Finally, the corresponding calorimetric response has been determined by using a simplified formulation of the heat diffusion equation. This permits to quantify heat sources and to carry out energy balances.
AB - Thermoelastic stress analysis and quantitative calorimetry are full-field noncontact techniques widely used to study the thermomechanical behaviour of materials. The first one linearly relates the sum of the principal stresses to the temperature variation, and the second one can be used to measure the mechanical dissipation. However, brittle materials such as glass are a priori bad candidates for these techniques. Indeed, their low-temperature variations under loading lead to very noisy infrared images, and their brittle mechanical behaviour does not allow to deform them significantly. In the present paper, the thermomechanical characterization of a holed glass sample under cyclic loading is performed. A preliminary new filtering methodology has been applied to the thermal movie to remove the noise. The stress field obtained from the thermoelastic stress analysis is well correlated to the finite element model showing that this technique is adapted to study the thermoelastic response of brittle materials. Finally, the corresponding calorimetric response has been determined by using a simplified formulation of the heat diffusion equation. This permits to quantify heat sources and to carry out energy balances.
KW - denoising methodology
KW - infrared thermography
KW - inorganic oxide glass
KW - quantitative calorimetry
KW - thermoelastic stress analysis
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U2 - 10.1111/str.12234
DO - 10.1111/str.12234
M3 - Article
AN - SCOPUS:85023781082
SN - 0039-2103
VL - 53
JO - Strain
JF - Strain
IS - 4
M1 - e12234
ER -