Fusible member intended to join two yokes to form a hinge

A tubular fusible member extending along a longitudinal axis for engaging in a two-lug clevis and a single-lug clevis in order to unite them and form a hinge, while being constrained in rotation relative to one of the clevises:

• the tubular fusible member having a central portion and two distal portions, the central portion being engaged in the single-lug clevis and the two distal portions each being arranged in respective lugs of the two-lug clevis when the fusible member is in place in the clevises;
• the fusible member being stressed in bending when the hinge is in a service position, the member being subjected to service forces in a predetermined direction relative to the clevis to which the fusible member is constrained in rotation, this bending acting in a bending plane that contains the longitudinal axis and that extends in the predetermined direction of the service forces;
• the fusible member rupturing in shear between its central portion and each distal portion when the service forces have a magnitude along an axis perpendicular to the longitudinal axis that is greater than a predetermined threshold value;
• and
• the fusible member presenting a cross-section of shape that varies gradually between a central section and two distal sections, each distal section having thickness that is reinforced in its regions extending parallel to the bending plane, the central section having a second moment of area relative to an axis normal to the bending plane that is greater than the second moment of area of the distal sections.