BEHAVIOR MODELING OF 2 ALUMINAS IN DIVERGENT SPHERICAL PYROTECHNICAL EXPERIMENTS

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