Fig 1.
The force-deflection response for a typical bistable mechanism is shown.
An optional preload stabilizes the mechanism for lower force inputs.
Fig 2.
Labeled bistable mechanism.
Fig 3.
Pseudo-rigid-body model of the compliant leg.
The compliance is modeled in the torsional and linear springs.
Fig 4.
Overlay of the PRBM on the bistable mechanism.
Table 1.
Strength-to-modulus and density ratios for commonly used materials in the space industry.
Fig 5.
Design iterations of the compliant bistable mechanism.
Fig 6.
Comparing geometry of compliant segments.
The thicker segments increase the force slightly.
Table 2.
Comparison of stresses for different design iterations of the compliant bistable mechanism.
Fig 7.
Bistable mechanism prototyped in ABS plastic, using a Dimension SST 1200ES 3D Printer, in its second stable position (left) and its fabricated position (right).
Table 3.
Design parameters for the bistable mechanism prototypes.
Fig 8.
Predicted energy curve of the metallic glass bistable mechanism from the PRBM.
Fig 9.
Predicted force-displacement curve of the metallic glass bistable mechanism from the PRBM.
Fig 10.
An example of the finite element mesh for the bistable mechanism.
Fig 11.
The maximum stress in the identically sized mechanisms as predicted by FEA.
Fig 12.
(a) Initial position of the finite element model. (b) Position where highest stress occurs during deflection. (c) Second stable position of the model.
Table 4.
Summary of how changes in the design parameters affect bistability and stress.
Fig 13.
A bistable non-explosive release mechanism demonstrator in its second stable position (left) and its fabricated position (right).
Fig 14.
Prototype of a pin-puller non-explosive release mechanism in its second stable position (left) and its fabricated position (right).
Fig 15.
Prototype of a cutter non-explosive release mechanism in its second stable position (left) and its fabricated position (right).
Fig 16.
Conceptual illustration of the cable cutting mechanism being employed as an antennae release mechanism on a cube-sat.