Adding programmable function to elastic metamaterials makes them versatile and intelligent. The objective of this study is to design and demonstrate thermomechanically tunable metamaterials with a compliant porous structure (CPS) and to analyze their thermomechanical behaviors. CPS, the unit cell of the metamaterial, is composed of rectangular holes, slits, and bimaterial hinges. By decomposing kinematic rotation of a linked arm and elastic deformation of a bimaterial hinge, a thermomechanical constitutive model of CPS is constructed, and the constitutive model is extended to a three-dimensional (3D) polyhedron structure for securing isotropic thermal properties. Temperature-dependent properties of base materials are implemented to the analytical model. The analytical model is verified with finite element (FE) based numerical simulations. A controllable range of temperature and strain is identified that is associated with a thermal deformation of the bimaterial hinge and contact on the slit surfaces of CPS. We also investigate the effect of geometry of CPS on the thermal expansion and effective stiffness of the metamaterial. The metamaterial with CPS has multiple transformation modes in response to temperature while keeping the same mechanical properties at room temperature, such as effective moduli and Poisson’s ratios. This work will pave the road toward the design of programmable metamaterials with both mechanically and thermally tunable capability, providing unique thermomechanical properties with a programmable function.
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April 2018
Research-Article
Thermomechanically Tunable Elastic Metamaterials With Compliant Porous Structures
Hyeonu Heo,
Hyeonu Heo
Mem. ASME
Department of Mechanical and
Energy Engineering,
University of North Texas,
Denton, TX 76207
e-mail: Hyeonu.Heo@unt.edu
Department of Mechanical and
Energy Engineering,
University of North Texas,
Denton, TX 76207
e-mail: Hyeonu.Heo@unt.edu
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Kwangwon Kim,
Kwangwon Kim
School of Aerospace and
Mechanical Engineering,
Korea Aerospace University,
Gyeonggi-do,
Goyang-si 10540, South Korea
e-mail: kwangwon84@gmail.com
Mechanical Engineering,
Korea Aerospace University,
Gyeonggi-do,
Goyang-si 10540, South Korea
e-mail: kwangwon84@gmail.com
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Addis Tessema,
Addis Tessema
Department of Mechanical Engineering,
University of South Carolina,
Columbia, SC 29208
e-mail: ATESSEMA@email.sc.edu
University of South Carolina,
Columbia, SC 29208
e-mail: ATESSEMA@email.sc.edu
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Addis Kidane,
Addis Kidane
Mem. ASME
Department of Mechanical Engineering,
University of South Carolina,
Columbia, SC 29208
e-mail: kidanea@cec.sc.edu
Department of Mechanical Engineering,
University of South Carolina,
Columbia, SC 29208
e-mail: kidanea@cec.sc.edu
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Jaehyung Ju
Jaehyung Ju
Mem. ASME
UM-SJTU Joint Institute,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: jaehyung.ju@sjtu.edu.cn
UM-SJTU Joint Institute,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: jaehyung.ju@sjtu.edu.cn
Search for other works by this author on:
Hyeonu Heo
Mem. ASME
Department of Mechanical and
Energy Engineering,
University of North Texas,
Denton, TX 76207
e-mail: Hyeonu.Heo@unt.edu
Department of Mechanical and
Energy Engineering,
University of North Texas,
Denton, TX 76207
e-mail: Hyeonu.Heo@unt.edu
Kwangwon Kim
School of Aerospace and
Mechanical Engineering,
Korea Aerospace University,
Gyeonggi-do,
Goyang-si 10540, South Korea
e-mail: kwangwon84@gmail.com
Mechanical Engineering,
Korea Aerospace University,
Gyeonggi-do,
Goyang-si 10540, South Korea
e-mail: kwangwon84@gmail.com
Addis Tessema
Department of Mechanical Engineering,
University of South Carolina,
Columbia, SC 29208
e-mail: ATESSEMA@email.sc.edu
University of South Carolina,
Columbia, SC 29208
e-mail: ATESSEMA@email.sc.edu
Addis Kidane
Mem. ASME
Department of Mechanical Engineering,
University of South Carolina,
Columbia, SC 29208
e-mail: kidanea@cec.sc.edu
Department of Mechanical Engineering,
University of South Carolina,
Columbia, SC 29208
e-mail: kidanea@cec.sc.edu
Jaehyung Ju
Mem. ASME
UM-SJTU Joint Institute,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: jaehyung.ju@sjtu.edu.cn
UM-SJTU Joint Institute,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: jaehyung.ju@sjtu.edu.cn
1Corresponding author.
Contributed by the Materials Division of ASME for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received May 13, 2017; final manuscript received September 16, 2017; published online October 27, 2017. Assoc. Editor: Toshio Nakamura.
J. Eng. Mater. Technol. Apr 2018, 140(2): 021004 (15 pages)
Published Online: October 27, 2017
Article history
Received:
May 13, 2017
Revised:
September 16, 2017
Citation
Heo, H., Kim, K., Tessema, A., Kidane, A., and Ju, J. (October 27, 2017). "Thermomechanically Tunable Elastic Metamaterials With Compliant Porous Structures." ASME. J. Eng. Mater. Technol. April 2018; 140(2): 021004. https://doi.org/10.1115/1.4038029
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