US 12,251,926 B2
Metastructure having zero elastic modulus zone and method for designing metastructure having zero elastic modulus zone
Bong Kyun Jang, Daejeon (KR); Jae Hyun Kim, Daejeon (KR); Se Jeong Won, Daejeon (KR); Hak Joo Lee, Daejeon (KR); Seung Mo Lee, Nonsan-si (KR); and Kwang Seop Kim, Daejeon (KR)
Assigned to CENTER FOR ADVANCED META-MATERIALS, Daejeon (KR)
Filed by CENTER FOR ADVANCED META-MATERIALS, Daejeon (KR)
Filed on Dec. 19, 2022, as Appl. No. 18/083,592.
Application 18/083,592 is a continuation of application No. PCT/KR2020/008522, filed on Jun. 30, 2020.
Prior Publication US 2023/0116960 A1, Apr. 20, 2023
Int. Cl. B41F 16/02 (2006.01); B41F 16/00 (2006.01); F16F 1/00 (2006.01)
CPC B41F 16/002 (2013.01) [F16F 1/00 (2013.01); F16F 2228/066 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A metastructure having a zero elastic modulus zone, the metastructure comprising:
a first unit having a structure capable of buckling and having a stress-strain relation having a zone corresponding to a negative elastic modulus; and
a second unit disposed adjacent to the first unit and having a stress-strain relation having a zone corresponding to a positive elastic modulus,
the metastructure having zero elastic modulus in a predetermined target strain zone through synthesis of the negative elastic modulus of the first unit with the positive elastic modulus of the second unit,
wherein the first unit comprises:
a first upper frame extending horizontally;
a first lower frame extending horizontally and spaced apart from the first upper frame; and
a pair of first support frames each connected at an upper end thereof to the first upper frame and connected at a lower end thereof to the first lower frame, a distance between the pair of first support frames increasing toward the first lower frame such that the pair of first support frames buckles upon application of compressive load.