Rebar chain tensioning
(wiki-TODO: Add illustrative images of tent-poles and concrete rebar and 3D printed example.)
Partly abstract concept page.
Motivation: This principle is about enabling quick recomposability by …
- (A) … avoiding the need for one-off production of new base-part due to by standardized sets of parts (generally of smallish-aspect-ratio).
- (B) … avoiding the need for high actuation effort tensionig elements at
every single interface between parts that are not permanently irreversibly fused
(B) Is achieved by dragging out the need for a high effort tensioning action to
only after the pre-assembly of a larger number of parts.
Why not just clip the parts together instead?
Yes, the Clip connectors combined with design principle of passive pretension
can likely be a less involved alternative in terms of
complexity of pars and number of parts and system operation.
But only to some degree. One gets several downsides:
- More constraints on loading directions
- More constraints in the mechanical behavior of the connections (especially in nanoscale atomistically granular systems).
- Possible a bit more actuation effort (energy, peak power, time) for each connection.
Doesn't the actuation effort just add up and need to be processed anyway?
The assembly is serial for one still only needs to tension up to the same force.
There is core-chain flex though which increases the energy needed a bit (linearly growing).
High power actions being batch processable is likely an advantage.
Sub principles
Several sub principles are employed in order to drag out this eventually unavoidable need.
- form closure for the core chain in the hull segments
- weak reversible bonding in pre-assembly (clips / vdW force for nanoscale sytems)
- positive locking of the final common tensioning element to make it reliable against accidental partial of full detensioning
- self centering between the hull segments to get nicely define coordinates when attaching stuff to structures formed by the hullsegmenst
Related
- ReChain fir tree core chain segments
- ReChain length adjustment hull segment
- ReChain tubular core chains & ReChain cylindrical hull segment
- ReChain naked core chain