EL YAGOUBI, Jalal; LAMON, Jacques; BATSALE, Jean-Christophe; LE FLEM, Marion

doi:10.1016/j.actamat.2019.05.010

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EL YAGOUBI, Jalal

Laboratoire des Composites Thermostructuraux [LCTS]
Institut de Mécanique et d'Ingénierie [I2M]

LAMON, Jacques
Centre des Matériaux [CDM]
Laboratoire des Composites Thermostructuraux [LCTS]

BATSALE, Jean-Christophe
Institut de Mécanique et d'Ingénierie [I2M]

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Acta Materialia. 2019, vol. 173, p. 302-312

Résumé en anglais

The influence of damage on thermal properties is an important issue for the design of reliable ceramicmatrix composites for high temperature applications. This work is devoted to the experimental study ofthis influence on SiC/SiC minicomposite. This single tow reinforced composite is appropriate to inves-tigating the damage mechanisms and thermal behavior. Relationships between the properties of con-stituents (fibre/matrix/interface) and behavior of the assembly can be established. Nevertheless, theliterature review showed that no experimental study has focused on the thermal behavior during me-chanical tests. Lock-in thermography was used to measure the thermal diffusivity during tensile tests onminicomposites while acoustic emission technique allowed monitoring damage. In this work, it isdemonstrated that the evolution of the thermal diffusivity competes favorably with acoustic emissionand Young's modulus as a reliable indicator of matrix damage< Réduire

Mots clés en anglais

Damage

Diffusivity

Composite

Fracture

Ceramics

Thermography

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Experimental assessment of damage-thermal diffusivity relationship in unidirectional fibre-reinforced composite under axial tensile test

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