Three-dimensional asymmetric lattice structure for tailoring the band gaps
AssigneeYong Suk Won
InventorJae Hoon Won
Life of this patent
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Abstract
Provided is an asymmetric three-dimensional lattice structure in which physical properties of a strut of a symmetric three-dimensional lattice structure is asymmetrically changed so as to adjust a band gap and a frequency range of a wave propagated in a particular direction in the three-dimensional lattice structure. An embodiment of the present disclosure also provides a lattice structure having six struts, four nodes, a first coating layer, and a second coating layer. The basic structure of the six struts is formed of polymer and the strut's basic structure has a same length L and radius r. Some struts may have a different thickness ratio between the first coating layer and the second coating layer, or may be coated with different materials to thereby have different properties.
Claims12
A lattice structure comprising:
- six struts;
- and
- four nodes contacting three struts among the six struts, wherein
- the struts each comprise:
- a strut basic structure having a radius r and a length L;
- a first coating layer coating the strut basic structure with a thickness T1;
- and
- a second coating layer coating the first coating layer with a thickness T2;
- wherein the four nodes are defined as a base node having a coordinate of (0,0,0) in a Cartesian coordinate system, a first node having a coordinate of
- (
- L
- 2
- ,
- L
- 2
- ,
- 0
- )
- ,
- a second node having a coordinate of
- (
- 0
- ,
- L
- 2
- ,
- L
- 2
- )
- ,
- and a third node having a coordinate of
- (
- L
- 2
- ,
- 0
- ,
- L
- 2
- )
- ,
- wherein basis vectors between the nodes are defined as an e1 vector orienting the first node from the base node, an e2 vector orienting the second node from the base node, and an e3 vector orienting the third node from the base node,
- wherein when a ratio between the thickness of the first coating layer and the thickness of the second coating layer of at least one strut is changed to allow the lattice structure to have an asymmetric three-dimensional structure, a band gap of wave propagation varies along reciprocal basis vectors of the basis vectors.
A lattice structure comprising:
- six struts;
- and
- four nodes contacting three struts among the six struts, wherein
- the struts each comprise:
- a strut basic structure having a radius r and a length L;
- a first coating layer coating the strut basic structure and formed of a first coating material;
- and
- a second coating layer coating the first coating layer and formed of a second coating material;
- wherein the four nodes are defined as a base node having a coordinate of (0,0,0) in a Cartesian coordinate system, a first node having a coordinate of
- (
- L
- 2
- ,
- L
- 2
- ,
- 0
- )
- ,
- a second node having a coordinate of
- (
- 0
- ,
- L
- 2
- ,
- L
- 2
- )
- ,
- and a third node having a coordinate of
- (
- L
- 2
- ,
- 0
- ,
- L
- 2
- )
- ,
- wherein basis vectors between the nodes are defined as an e1 vector orienting the first node from the base node, an e2 vector orienting the second node from the base node, and an e3 vector orienting the third node from the base node,
- wherein when a material of the first coating layer or the second coating layer of at least one strut is changed to allow the lattice structure to have an asymmetric three-dimensional structure, a band gap of wave propagation varies along reciprocal basis vectors of the basis vectors.
Dependencies are inferred from the claim text.