Determination of the elastic properties in CFRP composites: comparison of different approaches based on tensile tests and ultrasonic characterization

Victor Munoz Cuartas (1) , Marianne Perrin (2) , Marie-Laetitia Pastor (2) , Hélène Welemane (1) , Arthur Cantarel (2) , Moussa Karama (1)

1 LGP - Laboratoire Génie de Production
2 ICA - Institut Clément Ader

The mechanical characterization of composite materials is nowadays a major interest due to their increasing use in the aeronautic industry. The design of most of these materials is based on their stiffness, which is mainly obtained by means of tensile tests with strain gauge measurement. For thin laminated composites, this classical method requires adequate samples with specific orientation and does not provide all the independent elastic constants. Regarding ultrasonic characterization, especially immersion technique, only one specimen is needed and the entire determination of the stiffness tensor is possible. This paper presents a study of different methods to determine the mechanical properties of transversely isotropic carbon fibre composite materials (gauge and correlation strain measurement during tensile tests, ultrasonic immersion technique). Results are compared to ISO standards and manufacturer data to evaluate the accuracy of these techniques.

Mots clés: carbon fibre composite; elastic constants; ultrasonic characterization; tensile test; stiffness tensor

Domaines: Sciences de l'ingénieur [physics]; Mécanique [physics.med-ph]; Matériaux et structures en mécanique [physics.class-ph]

Victor Munoz Cuartas, Marianne Perrin, Marie-Laetitia Pastor, Hélène Welemane, Arthur Cantarel, et al.. Determination of the elastic properties in CFRP composites: comparison of different approaches based on tensile tests and ultrasonic characterization. Advances in Aircraft and Spacecraft Science, 2014, vol. 2 (n° 3), pp. 249-260. ⟨10.12989/aas.2015.2.3.249⟩. ⟨hal-01212100v2⟩