Method for making a structural part of a composite material having a calibrated thickness and structural part thus obtained

A method for producing a structural part from structural plies comprising fibres in a cured resin, said structural plies being capable of resisting strain, the method compromising:

• determining a minimum structural thickness value and a maximum structural thickness value for a predetermined thickness area of the structural part;
• determining a normal thickness value Enom for the predetermined thickness area of the structural part, wherein the normal thickness value is greater than the maximum structural thickness value;
• applying the structural plies to achieve, upon curing the resin, a structural thickness Es for the structural part, wherein the structural thickness Es is between the minimum structural thickness value and the maximum structural thickness values;
• applying one or more non-structural calibrating plies, not required for strain resistance, to at least one side of the structural plies to achieve a thickness ΔE of the one or more non-structural calibrating plies at least equal to the nominal thickness value Enom for the predetermined thickness area of the structural part minus the minimum structural thickness value;
• connecting the structural plies and non-structural calibrating plies;
• and
• calibrating a cured thickness of the structural part by machining the non-structural calibrating plies so that the cured thickness of said structural part in the predetermined thickness area is within upper and lower tolerances for the nominal thickness value Enom.