ELEMENT RAPPORTE COMPOSITE POUR PANNEAUX SANDWICH

摘要

A grommet-like insert for sandwich panels consists of two tubular sections, one having a male tip forced into a counterbore in a female skirt on the end of the other section so as to expand the skirt past its elastic limit and into the plastic deformation range, thereby providing a high load bearing capacity. The strength of the coupling is increased by work-hardening which occurs in the expansion of the skirt with a limited compression of the male tip. The diameter of the expanded skirt is substantially increased, and its tip cooperates with the opposed grommet head to grip the panel skin between them to provide high shear resistance.