Publications
1.
Liu, Jia; Gu, Tianyu; Shan, Sicong; Kang, Sung H.; Weaver, James C.; Bertoldi, Katia
Harnessing Buckling to Design Architected Materials that Exhibit Effective Negative Swelling Journal Article
In: Advanced Materials, vol. 28, pp. 6619–6624, 2016.
@article{Liu2016,
title = {Harnessing Buckling to Design Architected Materials that Exhibit Effective Negative Swelling},
author = {Jia Liu and Tianyu Gu and Sicong Shan and Sung H. Kang and James C. Weaver and Katia Bertoldi},
url = {http://onlinelibrary.wiley.com/doi/10.1002/adma.201600812/pdf},
doi = {10.1002/adma.201600812},
year = {2016},
date = {2016-05-17},
journal = {Advanced Materials},
volume = {28},
pages = {6619–6624},
abstract = {Inspired by the need to develop materials capable of targeted and extreme volume changes during operation, numerical simulations and experiments are combined to design a new class of soft architected materials that achieve a reduction of projected surface area coverage during swelling. },
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Inspired by the need to develop materials capable of targeted and extreme volume changes during operation, numerical simulations and experiments are combined to design a new class of soft architected materials that achieve a reduction of projected surface area coverage during swelling.
2.
Kang, Sung Hoon; Shan, Sicong; Košmrlj, Andrej; Noorduin, Wim L.; Shian, Samuel; Weaver, James C.; Clarke, David R.; Bertoldi, Katia
Complex Ordered Patterns in Mechanical Instability Induced Geometrically Frustrated Triangular Cellular Structures Journal Article
In: Physical Review Letters, vol. 112, pp. 098701, 2014, (Selected as Physical Review Letters Editors’ Suggestion and Highlighted in Physics Synopsis.).
@article{Kang2014,
title = {Complex Ordered Patterns in Mechanical Instability Induced Geometrically Frustrated Triangular Cellular Structures},
author = {Sung Hoon Kang and Sicong Shan and Andrej Košmrlj and Wim L. Noorduin and Samuel Shian and James C. Weaver and David R. Clarke and Katia Bertoldi},
url = {http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.112.098701},
year = {2014},
date = {2014-03-05},
journal = {Physical Review Letters},
volume = {112},
pages = {098701},
abstract = {Geometrical frustration arises when a local order cannot propagate throughout the space because of geometrical constraints. This phenomenon plays a major role in many systems leading to disordered ground-state configurations. Here, we report a theoretical and experimental study on the behavior of buckling-induced geometrically frustrated triangular cellular structures. To our surprise, we find that buckling induces complex ordered patterns which can be tuned by controlling the porosity of the structures. Our analysis reveals that the connected geometry of the cellular structure plays a crucial role in the generation of ordered states in this frustrated system.},
note = {Selected as Physical Review Letters Editors’ Suggestion and Highlighted in Physics Synopsis.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Geometrical frustration arises when a local order cannot propagate throughout the space because of geometrical constraints. This phenomenon plays a major role in many systems leading to disordered ground-state configurations. Here, we report a theoretical and experimental study on the behavior of buckling-induced geometrically frustrated triangular cellular structures. To our surprise, we find that buckling induces complex ordered patterns which can be tuned by controlling the porosity of the structures. Our analysis reveals that the connected geometry of the cellular structure plays a crucial role in the generation of ordered states in this frustrated system.
3.
Shim, Jongmin; Shan, Sicong; Kosmrlj, Andrej; Kang, Sung Hoon; Chen, Elizabeth R.; Weaver, James C.; Bertoldi, Katia
Harnessing Instabilities for Design of Soft Reconfigurable Auxetic/Chiral Materials Journal Article
In: Soft Matter, vol. 9, pp. 8198-8202, 2013, (Highlighted on the Soft Matter blog.).
@article{Shim2013,
title = {Harnessing Instabilities for Design of Soft Reconfigurable Auxetic/Chiral Materials},
author = {Jongmin Shim and Sicong Shan and Andrej Kosmrlj and Sung Hoon Kang and Elizabeth R. Chen and James C. Weaver and Katia Bertoldi},
url = {http://pubs.rsc.org/en/content/articlelanding/2013/sm/c3sm51148k#!divAbstract},
year = {2013},
date = {2013-05-31},
journal = {Soft Matter},
volume = {9},
pages = {8198-8202},
abstract = {Most materials have a unique form optimized for a specific property and function. However, the ability to reconfigure material structures depending on stimuli opens exciting opportunities. Although mechanical instabilities have been traditionally viewed as a failure mode, here we exploit them to design a class of 2D soft materials whose architecture can be dramatically changed in response to an external stimulus. By considering geometric constraints on the tessellations of the 2D Euclidean plane, we have identified four possible periodic distributions of uniform circular holes where mechanical instability can be exploited to reversibly switch between expanded (i.e. with circular holes) and compact (i.e. with elongated, almost closed elliptical holes) periodic configurations. Interestingly, in all these structures buckling is found to induce large negative values of incremental Poisson's ratio and in two of them also the formation of chiral patterns. Using a combination of finite element simulations and experiments at the centimeter scale we demonstrate a proof-of-concept of the proposed materials. Since the proposed mechanism for reconfigurable materials is induced by elastic instability, it is reversible, repeatable and scale-independent.},
note = {Highlighted on the Soft Matter blog.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Most materials have a unique form optimized for a specific property and function. However, the ability to reconfigure material structures depending on stimuli opens exciting opportunities. Although mechanical instabilities have been traditionally viewed as a failure mode, here we exploit them to design a class of 2D soft materials whose architecture can be dramatically changed in response to an external stimulus. By considering geometric constraints on the tessellations of the 2D Euclidean plane, we have identified four possible periodic distributions of uniform circular holes where mechanical instability can be exploited to reversibly switch between expanded (i.e. with circular holes) and compact (i.e. with elongated, almost closed elliptical holes) periodic configurations. Interestingly, in all these structures buckling is found to induce large negative values of incremental Poisson’s ratio and in two of them also the formation of chiral patterns. Using a combination of finite element simulations and experiments at the centimeter scale we demonstrate a proof-of-concept of the proposed materials. Since the proposed mechanism for reconfigurable materials is induced by elastic instability, it is reversible, repeatable and scale-independent.
4.
Kang, Sung Hoon; Shan, Sicong; Noorduin, Wim L.; Khan, Mughees; Aizenberg, Joanna; Bertoldi, Katia
Buckling-Induced Reversible Symmetry Breaking and Chiral Amplification Using Supported Cellular Structures Journal Article
In: Advanced Materials, vol. 25, pp. 3380-3385, 2013, (SHK, SS, and WLN contributed equally. Highlighted in the June 2013 issue of Nature Physics).
@article{Kang2013,
title = {Buckling-Induced Reversible Symmetry Breaking and Chiral Amplification Using Supported Cellular Structures},
author = {Sung Hoon Kang and Sicong Shan and Wim L. Noorduin and Mughees Khan and Joanna Aizenberg and Katia Bertoldi},
url = {http://onlinelibrary.wiley.com/doi/10.1002/adma.201300617/abstract},
year = {2013},
date = {2013-05-02},
journal = {Advanced Materials},
volume = {25},
pages = {3380-3385},
abstract = {Buckling-induced reversible symmetry breaking and amplification of chirality using macro- and microscale supported cellular structures is described. Guided by extensive theoretical analysis, cellular structures are rationally designed, in which buckling induces a reversible switching between achiral and chiral configurations. Additionally, it is demonstrated that the proposed mechanism can be generalized over a wide range of length scales, geometries, materials, and stimuli. },
note = {SHK, SS, and WLN contributed equally.
Highlighted in the June 2013 issue of Nature Physics},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Buckling-induced reversible symmetry breaking and amplification of chirality using macro- and microscale supported cellular structures is described. Guided by extensive theoretical analysis, cellular structures are rationally designed, in which buckling induces a reversible switching between achiral and chiral configurations. Additionally, it is demonstrated that the proposed mechanism can be generalized over a wide range of length scales, geometries, materials, and stimuli.
Note: Send e-mail to Prof. Kang at [email protected] if you need a pdf file of the papers below.
2016
Liu, Jia; Gu, Tianyu; Shan, Sicong; Kang, Sung H.; Weaver, James C.; Bertoldi, Katia
Harnessing Buckling to Design Architected Materials that Exhibit Effective Negative Swelling Journal Article
In: Advanced Materials, vol. 28, pp. 6619–6624, 2016.
Abstract | Links | BibTeX | Tags: architected materials, Mechanical Instability, mechanics of soft materials and structures, Reversible, Soft Periodic Porous Structures
@article{Liu2016,
title = {Harnessing Buckling to Design Architected Materials that Exhibit Effective Negative Swelling},
author = {Jia Liu and Tianyu Gu and Sicong Shan and Sung H. Kang and James C. Weaver and Katia Bertoldi},
url = {http://onlinelibrary.wiley.com/doi/10.1002/adma.201600812/pdf},
doi = {10.1002/adma.201600812},
year = {2016},
date = {2016-05-17},
journal = {Advanced Materials},
volume = {28},
pages = {6619–6624},
abstract = {Inspired by the need to develop materials capable of targeted and extreme volume changes during operation, numerical simulations and experiments are combined to design a new class of soft architected materials that achieve a reduction of projected surface area coverage during swelling. },
keywords = {architected materials, Mechanical Instability, mechanics of soft materials and structures, Reversible, Soft Periodic Porous Structures},
pubstate = {published},
tppubtype = {article}
}
Inspired by the need to develop materials capable of targeted and extreme volume changes during operation, numerical simulations and experiments are combined to design a new class of soft architected materials that achieve a reduction of projected surface area coverage during swelling.
2014
Kang, Sung Hoon; Shan, Sicong; Košmrlj, Andrej; Noorduin, Wim L.; Shian, Samuel; Weaver, James C.; Clarke, David R.; Bertoldi, Katia
Complex Ordered Patterns in Mechanical Instability Induced Geometrically Frustrated Triangular Cellular Structures Journal Article
In: Physical Review Letters, vol. 112, pp. 098701, 2014, (Selected as Physical Review Letters Editors’ Suggestion and Highlighted in Physics Synopsis.).
Abstract | Links | BibTeX | Tags: 3D printing, Cellular Structures, Geometrical Frustration, Mechanical Instability, mechanics of soft materials and structures, Triangular Lattice
@article{Kang2014,
title = {Complex Ordered Patterns in Mechanical Instability Induced Geometrically Frustrated Triangular Cellular Structures},
author = {Sung Hoon Kang and Sicong Shan and Andrej Košmrlj and Wim L. Noorduin and Samuel Shian and James C. Weaver and David R. Clarke and Katia Bertoldi},
url = {http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.112.098701},
year = {2014},
date = {2014-03-05},
journal = {Physical Review Letters},
volume = {112},
pages = {098701},
abstract = {Geometrical frustration arises when a local order cannot propagate throughout the space because of geometrical constraints. This phenomenon plays a major role in many systems leading to disordered ground-state configurations. Here, we report a theoretical and experimental study on the behavior of buckling-induced geometrically frustrated triangular cellular structures. To our surprise, we find that buckling induces complex ordered patterns which can be tuned by controlling the porosity of the structures. Our analysis reveals that the connected geometry of the cellular structure plays a crucial role in the generation of ordered states in this frustrated system.},
note = {Selected as Physical Review Letters Editors’ Suggestion and Highlighted in Physics Synopsis.},
keywords = {3D printing, Cellular Structures, Geometrical Frustration, Mechanical Instability, mechanics of soft materials and structures, Triangular Lattice},
pubstate = {published},
tppubtype = {article}
}
Geometrical frustration arises when a local order cannot propagate throughout the space because of geometrical constraints. This phenomenon plays a major role in many systems leading to disordered ground-state configurations. Here, we report a theoretical and experimental study on the behavior of buckling-induced geometrically frustrated triangular cellular structures. To our surprise, we find that buckling induces complex ordered patterns which can be tuned by controlling the porosity of the structures. Our analysis reveals that the connected geometry of the cellular structure plays a crucial role in the generation of ordered states in this frustrated system.
2013
Shim, Jongmin; Shan, Sicong; Kosmrlj, Andrej; Kang, Sung Hoon; Chen, Elizabeth R.; Weaver, James C.; Bertoldi, Katia
Harnessing Instabilities for Design of Soft Reconfigurable Auxetic/Chiral Materials Journal Article
In: Soft Matter, vol. 9, pp. 8198-8202, 2013, (Highlighted on the Soft Matter blog.).
Abstract | Links | BibTeX | Tags: 3D printing, architected materials, Auxetic, Chiral, Mechanical Instability, mechanics of soft materials and structures, Metamaterial, Soft Periodic Porous Structures, Symmetry Breaking
@article{Shim2013,
title = {Harnessing Instabilities for Design of Soft Reconfigurable Auxetic/Chiral Materials},
author = {Jongmin Shim and Sicong Shan and Andrej Kosmrlj and Sung Hoon Kang and Elizabeth R. Chen and James C. Weaver and Katia Bertoldi},
url = {http://pubs.rsc.org/en/content/articlelanding/2013/sm/c3sm51148k#!divAbstract},
year = {2013},
date = {2013-05-31},
journal = {Soft Matter},
volume = {9},
pages = {8198-8202},
abstract = {Most materials have a unique form optimized for a specific property and function. However, the ability to reconfigure material structures depending on stimuli opens exciting opportunities. Although mechanical instabilities have been traditionally viewed as a failure mode, here we exploit them to design a class of 2D soft materials whose architecture can be dramatically changed in response to an external stimulus. By considering geometric constraints on the tessellations of the 2D Euclidean plane, we have identified four possible periodic distributions of uniform circular holes where mechanical instability can be exploited to reversibly switch between expanded (i.e. with circular holes) and compact (i.e. with elongated, almost closed elliptical holes) periodic configurations. Interestingly, in all these structures buckling is found to induce large negative values of incremental Poisson's ratio and in two of them also the formation of chiral patterns. Using a combination of finite element simulations and experiments at the centimeter scale we demonstrate a proof-of-concept of the proposed materials. Since the proposed mechanism for reconfigurable materials is induced by elastic instability, it is reversible, repeatable and scale-independent.},
note = {Highlighted on the Soft Matter blog.},
keywords = {3D printing, architected materials, Auxetic, Chiral, Mechanical Instability, mechanics of soft materials and structures, Metamaterial, Soft Periodic Porous Structures, Symmetry Breaking},
pubstate = {published},
tppubtype = {article}
}
Most materials have a unique form optimized for a specific property and function. However, the ability to reconfigure material structures depending on stimuli opens exciting opportunities. Although mechanical instabilities have been traditionally viewed as a failure mode, here we exploit them to design a class of 2D soft materials whose architecture can be dramatically changed in response to an external stimulus. By considering geometric constraints on the tessellations of the 2D Euclidean plane, we have identified four possible periodic distributions of uniform circular holes where mechanical instability can be exploited to reversibly switch between expanded (i.e. with circular holes) and compact (i.e. with elongated, almost closed elliptical holes) periodic configurations. Interestingly, in all these structures buckling is found to induce large negative values of incremental Poisson’s ratio and in two of them also the formation of chiral patterns. Using a combination of finite element simulations and experiments at the centimeter scale we demonstrate a proof-of-concept of the proposed materials. Since the proposed mechanism for reconfigurable materials is induced by elastic instability, it is reversible, repeatable and scale-independent.
Kang, Sung Hoon; Shan, Sicong; Noorduin, Wim L.; Khan, Mughees; Aizenberg, Joanna; Bertoldi, Katia
Buckling-Induced Reversible Symmetry Breaking and Chiral Amplification Using Supported Cellular Structures Journal Article
In: Advanced Materials, vol. 25, pp. 3380-3385, 2013, (SHK, SS, and WLN contributed equally. Highlighted in the June 2013 issue of Nature Physics).
Abstract | Links | BibTeX | Tags: 3D printing, Amplification, Cellular Structures, Mechanical Instability, mechanics of soft materials and structures, Reversible, Symmetry Breaking
@article{Kang2013,
title = {Buckling-Induced Reversible Symmetry Breaking and Chiral Amplification Using Supported Cellular Structures},
author = {Sung Hoon Kang and Sicong Shan and Wim L. Noorduin and Mughees Khan and Joanna Aizenberg and Katia Bertoldi},
url = {http://onlinelibrary.wiley.com/doi/10.1002/adma.201300617/abstract},
year = {2013},
date = {2013-05-02},
journal = {Advanced Materials},
volume = {25},
pages = {3380-3385},
abstract = {Buckling-induced reversible symmetry breaking and amplification of chirality using macro- and microscale supported cellular structures is described. Guided by extensive theoretical analysis, cellular structures are rationally designed, in which buckling induces a reversible switching between achiral and chiral configurations. Additionally, it is demonstrated that the proposed mechanism can be generalized over a wide range of length scales, geometries, materials, and stimuli. },
note = {SHK, SS, and WLN contributed equally.
Highlighted in the June 2013 issue of Nature Physics},
keywords = {3D printing, Amplification, Cellular Structures, Mechanical Instability, mechanics of soft materials and structures, Reversible, Symmetry Breaking},
pubstate = {published},
tppubtype = {article}
}
Buckling-induced reversible symmetry breaking and amplification of chirality using macro- and microscale supported cellular structures is described. Guided by extensive theoretical analysis, cellular structures are rationally designed, in which buckling induces a reversible switching between achiral and chiral configurations. Additionally, it is demonstrated that the proposed mechanism can be generalized over a wide range of length scales, geometries, materials, and stimuli.