Experimental and numerical investigation of the asymmetric primary creep of a fibre reinforced refractory concrete at 1200 degrees C

Gilles Dusserre (1) , Olivier Valentin (2) , Fabien Nazaret (2) , Thierry Cutard (1)

1 ICA - Institut Clément Ader
2 Aurock

Tension/compression asymmetry is a key feature of the creep behaviour of ceramics at high temperature. This paper investigates the capability of Drucker-Prager creep model, based on a sensitivity of the equivalent creep stress to the pressure, to account for the creep behaviour of a refractory concrete subjected to compression and bending. A relevant calibration procedure is proposed. The analysis mainly focuses on the associativity of the creep flow. A profile analysis of a compressed sample allows concluding that the creep flow is dilatant and thus associated. A discussion on the neutral axis shift during bending creep is carried out with the model calibrated on the experiments.

Mots clés: Constitutive behaviour; Concrete; Mechanical testing; Creep; Finite elements

Domaines: Sciences de l'ingénieur [physics]

Gilles Dusserre, Olivier Valentin, Fabien Nazaret, Thierry Cutard. Experimental and numerical investigation of the asymmetric primary creep of a fibre reinforced refractory concrete at 1200 degrees C. Journal of the European Ceramic Society, 2016, 36 (10), p. 2627-2639. ⟨10.1016/j.jeurceramsoc.2016.03.007⟩. ⟨hal-01609021⟩