Process for improving the resistance to the initiation, in a steady state, and to the propagation of microcracks in a composite adhesive joint

摘要

Process for improving the resistance to the initiation, in a steady state, and to the propagation of microcracks in a composite adhesive joint adhering to the surface or support 1 of a substrate 2. This process is characterised in that the support is pretreated so as to give it an average roughness Rt substantially equal to the average size of the small filler particles 5, that is to say of the order of 1 to 10 micrometres, and additionally to give the rough support 1 a corrugated shape consisting of a succession of holes 1b and prominences 1a, these hollows having a depth Wt substantially of the order of magnitude of the average size of the large filler particles 7. IMAGE