02 Second Order/Coupling Conditions/Boundary Loosening
Boundary Loosening
Boundary Loosening names a coupled boundary becoming less tightly held while the coupling has not yet fully broken. It is not decoupling by itself; it is the readable weakening, widening, softening, or loss of tightness in the boundary that coupling has been holding.
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Boundary Loosening becomes recognisable where a coupled boundary remains available but no longer holds the same tightness, constraint, or mutual fit it previously carried.