Abstract: A screening element in the form of a sintered monolithic body has an outer face and an opposing inner face with an area of the faces greater than 100 cm2 and the mean thickness Em between the faces greater than 4 mm. At least a portion of the outer face is textured such that Ai decreases from the inner face from a value of i greater than at least 50, A75?0.2×A0 and A95<0.9×A0, 0.03×A0<A95<0.5×A0 and A100<0.1×A0. Ai being the area occupied by the material alone along a plane i of internal section at the intermediate thickness Ei and i corresponding in percentage to the fraction of the mean thickness Em at plane i.

Abstract: A device that includes a piece of armor made from a material that has a domain of plastic deformation under bad before breaking and an elastic deformation domain. The plastic deformation domain represents less than 1% of the elastic deformation domain. The device includes a deformation sensor fixed to the piece of armor and configured to deform plastically under the effect of at least a stress applied to the piece of armor and leading to damage of the piece of armor.