Connecting element and method for producing a structural connection between two structural parts by foamable material, and assembly composed of two structural parts connected with a connecting element

A connecting element for producing a structural connection between a first structural part and a second structural part by a foamable material, the connecting element comprising:

• a plug-in part displaced along a plug-in direction and comprising at least two chambers separated from one another in a fluid-tight manner by a partition, each of the at least two chambers accommodating a reactant;
• a plug-in delimiting part mechanically connected to the plug-in part and configured to delimit displacement of the plug-in part in the plug-in direction, the plug-in delimiting part protruding radially, at least in part, outward beyond a circumferential surface of the plug-in part;
• and
• a break-open mechanism configured to damage the partition, as a result of a break-open force supplied to the break-open mechanism, such that the fluid-tight manner between the at least two chambers is canceled,
• wherein reactants of the respective chambers are selected such that mixing thereof causes a foaming reaction, which extends radially outward beyond the circumferential surface of the plug-in part.