Separation bolt by eutectic decohesion

An axially separable fastener to detach upon command of an electric signal, said fastener comprising:

• a bolt having a metal shank with proximal and distal ends, said shank including a first head at said proximal end, and a first helical external thread and an axial bore with a first helical internal thread at said distal end;
• an external nut for screwing onto said first external thread with the fastener operating between said first head and said external nut;
• a frangible annular ampoule containing a liquid metal eutectic, said ampoule being insertable into said bore;
• and
• an internal plug having a second head, a retracting actuator and a plunger opposite said second head, said plunger extending through said ampoule, wherein
• upon receipt of the signal, said actuator axially drives said plunger towards said distal end for rupture of said ampoule to release said eutectic within said bore, thereby detaching said bolt.

An axially separable fastener having a metal shank with compression flanges at each of proximal and distal ends, said shank to detach upon command of an electric signal, said fastener comprising:

• an axial bore within the shank from the distal end;
• a frangible ampoule containing a liquid metal eutectic for disposition within said bore;
• and
• an internal plug having an actuator and a probe, said plug inserting into said bore to seal said ampoule therein, wherein
• upon receipt of the signal, said actuator axially drives said probe to rupture said ampoule and release said eutectic within said bore, thereby detaching said bolt.