Behaviour Modelling of Two Aluminas in Divergent Spherical Pyrotechnical experiments

F. Malaise , J.-Y. Tranchet , Francis Collombet

Two pure aluminas of different characteristics have been subjected to the propagation of a longitudinal divergent spherical shock wave through pyrotechnical experiments. An approach combining a phenomenological analysis and numerical 1D-calculations is proposed to study the behaviour of these aluminas submitted to that type of wave loading. The modelling. proposed in a previous paper, is refined and gives satisfying experimentation-calculation correlations. An analysis of the influence exerted by the various encountered phenomena (plastic activity, pore closure, microcracking) is performed. The significant consequence of the activation of damage with an extension criterion is also underlined.

Domaines: Articles anciens

F. Malaise, J.-Y. Tranchet, Francis Collombet. Behaviour Modelling of Two Aluminas in Divergent Spherical Pyrotechnical experiments. Journal de Physique IV Proceedings, 1997, 07 (C3), pp.C3-681-C3-686. ⟨10.1051/jp4:19973116⟩. ⟨jpa-00255401⟩