Virtual stiffness
A stiffly connected systems in machine phase can present to a site in the system
a virtual stiffness of some other part of the system that is stiffly connected
via some mechanism that gives some amount of mechanical advantage.
The virtual stiffness is the local stiffness combined (serially or parallely)
with the by the leverage factor multiplied
connected non-local stiffness.
(wiki-TODO: Give concrete examples. Improve on the therse dense unreviewed description.)
(wiki-TODO: Cover the relation to stiffness focusing too.)
Delineation
Gaining higher stiffness than the base material by introducing pre-tension.
See: ReChain frame systems & ReChain index &