Mechanical metamaterial - Revision history

Apm: Category:Surprising facts

2026-03-29T20:27:05Z

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	[[Category:Far term target]]		[[Category:Far term target]]
			[[Category:Surprising facts]]

Apm: Category:Far term target

2026-03-29T17:08:39Z

Category:Far term target

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	* [https://en.wikipedia.org/wiki/Auxetics Auxetics] – one peculiar example of an nigh infinite amount of possibilities		* [https://en.wikipedia.org/wiki/Auxetics Auxetics] – one peculiar example of an nigh infinite amount of possibilities

			[[Category:Far term target]]

Apm: typofixes,spelling, & co

2025-08-07T11:00:27Z

typofixes,spelling, & co

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	Mechanical metamaterials are materials that emulate mechanical properties through structuring at smaller size-scales. <br>		Mechanical metamaterials are materials that emulate mechanical properties through structuring at smaller size-scales. <br>
	This is relative. Mechanical metamaterials can have their base structures at all scales. <br>		This is relative. Mechanical metamaterials can have their base structures at all scales. <br>
	E.g. ~~Cainmaille~~ is crude, textiles are fine. For base structures at the nanoscale see: [[Gemstone based metamaterial]]		E.g. Chainmaille is crude, textiles are fine. For base structures at the nanoscale see: [[Gemstone based metamaterial]]

	Reversible assembly is highly desirable. <br>		Reversible assembly is highly desirable. <br>
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	* Chainmaille		* Chainmaille
	* Textiles		* Textiles
	* many natural materials produced by living organisms (bones with structured voids, ~~naca~~ with layered protein and minerals, ...)		* many natural materials produced by living organisms (bones with structured voids, nacre with layered protein and minerals, ...)
	* .. there may be a few more that constitute whole different classes ??		* … (there may be a few more that constitute whole different classes)

	=== Future ===		=== Future ===

Apm: /* Some few more concrete examples */ added line-breaks & some fices

2023-12-05T07:25:21Z

Some few more concrete examples: added line-breaks & some fices

← Older revision		Revision as of 09:25, 5 December 2023
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	=== Some few more concrete examples ===		=== Some few more concrete examples ===

	* (Passive) '''auxetic metamaterials:''' Metamaterials which use their non actuated internal structure to create a '''negative Poisson ratio'''. That is they expand transversally (sidewards) when stretched longitudinally (lengthwise) and they contract transversally when compressed longitudinally.		* (Passive) '''auxetic metamaterials:''' Metamaterials which use their non actuated internal structure to create a '''negative Poisson ratio'''. <br>That is they expand transversally (sidewards) when stretched longitudinally (lengthwise) and they contract transversally when compressed longitudinally.
	* Metamaterials with (clearly independent) internal degrees of freedom deliberately left under-constrained. If the structural pieces are sheet shaped and the hinges allow compression to complete collapse without destruction one ends up with [[origami]] structures. Note that metamaterials are by far not limited to [[origami]] structures. Such structures can ~~sbe~~ made active ~~just~~ by adding actuators independently ~~cation~~ on the ~~seperate~~ degrees of freedom.		* Metamaterials with (clearly independent) internal degrees of freedom deliberately left under-constrained. <br>If the small structural pieces are sheet shaped and the hinges allow compression to complete collapse without destruction one ends up with [[origami]] like structures. <br>Note that metamaterials are by far not limited to [[origami]] structures. <br>Such structures can be made active structures by adding actuators independently acting on the separate degrees of freedom.
	* Metamaterials using internal flexing or hinging to act as complex mechanisms / machines. Giving up on long range periodicity (translation symmetry) symmetry blurs the line to (nano)machinery and ([[Nanomechanical computation\|nano]])[[mechanical computation]]. What makes a metamaterial is the presence of at least a little bit of repetition.		* Metamaterials using internal flexing or hinging to act as complex mechanisms / machines. <br>Giving up on long range periodicity (translation symmetry) symmetry blurs the line to [[Nanomachinery\|(nano)machinery]] and ([[Nanomechanical computation\|nano]])[[mechanical computation]]. <br>What makes a metamaterial is the presence of at least a little bit of repetition.

	== Non-mechanical metamaterials ==		== Non-mechanical metamaterials ==

Apm: /* Future */

2023-12-05T07:19:03Z

Future

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	=== Future ===		=== Future ===

	Future mechanical metamaterials based on [[gemstone like compounds]] (in particular based on [[base materials with high potential]])		Future mechanical metamaterials based on [[gemstone like compounds]] <br>
			(in particular based on [[base materials with high potential]])
	* [[gemstone based metamaterial]]s		* [[gemstone based metamaterial]]s

Apm: /* Related / added '''Emulated elasticity'''

2023-12-05T07:14:18Z

Related: added * '''Emulated elasticity'''

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	* '''[[Digital control over matter]]'''		* '''[[Digital control over matter]]'''
			* '''[[Emulated elasticity]]'''
	* '''[[Metamaterial]]'''		* '''[[Metamaterial]]'''
	* [[Gemstone based metamaterial]]		* [[Gemstone based metamaterial]]

Apm: /* Examples for (mechanical) metamaterials: past, present, future */ moved over from general metamaterials page

2023-06-08T10:29:20Z

Examples for (mechanical) metamaterials: past, present, future: moved over from general metamaterials page

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	Many unusual properties are (will be) possible. <br>		Many unusual properties are (will be) possible. <br>
	For more examples see: [[Metamaterial#Examples]]		For more examples see: [[Metamaterial#Examples]]

			=== Some few more concrete examples ===

			* (Passive) '''auxetic metamaterials:''' Metamaterials which use their non actuated internal structure to create a '''negative Poisson ratio'''. That is they expand transversally (sidewards) when stretched longitudinally (lengthwise) and they contract transversally when compressed longitudinally.
			* Metamaterials with (clearly independent) internal degrees of freedom deliberately left under-constrained. If the structural pieces are sheet shaped and the hinges allow compression to complete collapse without destruction one ends up with [[origami]] structures. Note that metamaterials are by far not limited to [[origami]] structures. Such structures can sbe made active just by adding actuators independently cation on the seperate degrees of freedom.
			* Metamaterials using internal flexing or hinging to act as complex mechanisms / machines. Giving up on long range periodicity (translation symmetry) symmetry blurs the line to (nano)machinery and ([[Nanomechanical computation\|nano]])[[mechanical computation]]. What makes a metamaterial is the presence of at least a little bit of repetition.

	== Non-mechanical metamaterials ==		== Non-mechanical metamaterials ==

Apm: /* Non-mechanical metamaterials */

2023-06-08T10:27:16Z

Non-mechanical metamaterials

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	* [[Thermal metamaterial]]		* [[Thermal metamaterial]]
	* [[Electrical metamaterials]]		* [[Electrical metamaterials]]
	* ... many more		* ... many more other types of [[metamaterial]]s

	== Related ==		== Related ==

Apm: /* Non-mechanical metamaterials */

2023-06-08T10:26:34Z

Non-mechanical metamaterials

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	* [[Thermal metamaterial]]		* [[Thermal metamaterial]]
	* [[Electrical metamaterials]]		* [[Electrical metamaterials]]
			* ... many more

	== Related ==		== Related ==

Apm: reordering getting the graphic further up & removed the stub marker

2023-06-08T10:25:31Z

reordering getting the graphic further up & removed the stub marker

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	~~{{stub}}~~
	Up: [[Metamaterial]]s		Up: [[Metamaterial]]s

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	See: [[Digital control over matter]]		See: [[Digital control over matter]]

	~~== Non-mechanical metamaterials ==~~		== Clear delineation to optical metamaterials ==

	~~The complement to mechanical metamaterials are the non-mechanical metamaterials.~~
	~~These include:~~
	* [[Electromagnetic metamaterial]] with the subclasses of [[Optical metamaterials]] and crude [[Radio frequency metamaterials]]
	* [[Thermal metamaterial]]
	* [[Electrical metamaterials]]

	=== Clear delineation to optical metamaterials ===

	The term "[[Metamaterial]]" without prefix is often used to refer to optical metamaterials.		The term "[[Metamaterial]]" without prefix is often used to refer to optical metamaterials.
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	* More advanced mechanical metamaterials are maybe experimentally less accessible than optical metamaterials (questionable ...)		* More advanced mechanical metamaterials are maybe experimentally less accessible than optical metamaterials (questionable ...)

	== Examples ==		== Examples for <small>(mechanical)</small> metamaterials: past, present, future ==

			{\| cellpadding="10" style="background-color: #bbffbb; vertical-align:middle; margin-left: auto; margin-right: auto;"
			\| [[File:Patch of chain maille held in hand.JPG\|thumb\|right\|x240px\|Metamaterial<br>out of the past: chain maille<br>'''Base-material:''' metals<br>'''Structure-size:''' clearly visible]]
			\| [[File:Patch of textile held in hand.jpg\|thumb\|center\|x240px\|middle\|Metamaterial<br>of today: textiles<br>'''Base-material:''' plastics<br>'''Structure-size:''' microscopic]]
			\| [[File:nanocell crystal 1.jpg\|thumb\|left\|x240px\|middle\|Metamaterial<br>of the future: "gem-gum"<br>'''Base-material:''' gemstones<br>'''Structure-size:''' a few atoms]]
			\|}

	=== Today ===		=== Today ===
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	For more examples see: [[Metamaterial#Examples]]		For more examples see: [[Metamaterial#Examples]]

	= ~~Examples for <small>(~~mechanical~~)</small>~~ metamaterials~~: past, present, future~~ =		== Non-mechanical metamaterials ==

	~~{\| cellpadding="10" style="background~~-~~color: #bbffbb; vertical-align:middle; margin-left: auto; margin-right~~: ~~auto;"~~		The complement to mechanical metamaterials are the non-mechanical metamaterials.
	\| [[~~File:Patch~~ of ~~chain maille held in hand.JPG\|thumb\|right\|x240px\|Metamaterial<br>out of the past: chain maille<br>'''Base-material:''' metals<br>'''Structure-size:''' clearly visible~~]]		These include:
	\| [[~~File:Patch of textile held in hand.jpg\|thumb\|center\|x240px\|middle\|Metamaterial<br>of today: textiles<br>'''Base-material:''' plastics<br>'''Structure-size:''' microscopic~~]]		* [[Electromagnetic metamaterial]] with the subclasses of [[Optical metamaterials]] and crude [[Radio frequency metamaterials]]
	\| [[~~File:nanocell crystal 1.jpg\|thumb\|left\|x240px\|middle\|Metamaterial<br>of the future: "gem-gum"<br>'''Base-material:''' gemstones<br>'''Structure-size:''' a few atoms~~]]		* [[Thermal metamaterial]]
	\|}		* [[Electrical metamaterials]]

	== Related ==		== Related ==

Mechanical metamaterial - Revision history

Apm: Category:Surprising facts

Apm: Category:Far term target

Apm: typofixes,spelling, & co

Apm: /* Some few more concrete examples */ added line-breaks & some fices

Apm: /* Future */

Apm: /* Related */ added * '''Emulated elasticity'''

Apm: /* Examples for (mechanical) metamaterials: past, present, future */ moved over from general metamaterials page

Apm: /* Non-mechanical metamaterials */

Apm: /* Non-mechanical metamaterials */

Apm: reordering getting the graphic further up & removed the stub marker

Apm: /* Related / added '''Emulated elasticity'''