chuzel-marmot08-SEMINAIRE

This paper is devoted to the modeling of mechanical properties as well as failure of ice which may pass through airplane engines. A series of tests has been performed at ONERA to characterize the response of ice under this type of loadings. The dynamic failure has been observed using an extremely high speed camera (200 000 images/s). One can see how the failure progresses within the specimen during the dynamic fracture. The effects of velocity on compression and traction limit stress is also presented for strain rates up to 1000/s. Other experiments of impacts on a plate compare the effects of two impactors with same mass and same velocity: one is an ice small cylinder and the other is a water mass. The comparison shows the interest of modeling ice as a solid. The mechanical model chosen to model the ice is presented. It has been implemented in an explicit code. Comparisons of computed results with experiments are given.