Bistable Snap-Action Switch

Leaf Spring Chain • btGeneric6DofConstraint • Von Mises Truss • Force vs Displacement • Negative Stiffness

Bistable Leaf Spring — 3D

Segments: — • State: — • Disp: 0.00 • Force: 0.0

Force vs Displacement

Switch State

STABLE — UP

Centre Displacement

0.00

units

Applied Force

0.0

Snap-Through Count

events

Segments	—
Span Length	—
Initial Rise h	—
Angular Stiffness	—
Rise / Span Ratio	—
Constraints	—
Physics Bodies	—
Graph Samples	0

Von Mises Truss Theory

Bistability: The arch has two stable equilibria — curved up & curved down — separated by an unstable flat state.

Snap-Through: When applied force exceeds the critical buckling load, the structure "snaps" to the other stable state.

Negative Stiffness: In the F-D curve, the region where dF/dδ < 0 is the negative stiffness zone — force decreases while displacement increases.

Critical Force: F_cr ∝ EI · h / L² where h = rise, L = span, EI = bending stiffness.

Model: Chain of rigid segments linked by btGeneric6DofConstraint with angular spring stiffness simulating bending rigidity.

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