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Journal Articles

Mechanical Couplings of 3D Lattice Materials Discovered by Micropolar Elasticity and Geometric Symmetry

Zhiming Cui, Zhihao Yuan, Jaehyung Ju
Journal: Journal of Applied Mechanics
Publisher: ASME
Article Type: Research Papers
J. Appl. Mech. April 2023, 90(4): 041001.
Paper No: JAM-22-1338
https://doi.org/10.1115/1.4056349
Published Online: December 26, 2022
View Article titled, Mechanical Couplings of 3D Lattice Materials Discovered by Micropolar Elasticity and Geometric Symmetry
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Topics: Couplings, Elasticity, Tensors, Shear (Mechanics), Geometry, Rotation
Journal Articles

Coupling of a Magnetic Field With Instability for Multimodal and Multistep Deformations of a Curved Beam With Asymmetric Magnetic Torque

Bihui Zou, Zihe Liang, Jaehyung Ju
Journal: Journal of Applied Mechanics
Publisher: ASME
Article Type: Research Papers
J. Appl. Mech. February 2023, 90(2): 021001.
Paper No: JAM-22-1276
https://doi.org/10.1115/1.4056001
Published Online: November 7, 2022
View Article titled, Coupling of a Magnetic Field With Instability for Multimodal and Multistep Deformations of a Curved Beam With Asymmetric Magnetic Torque
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Topics: Deformation, Magnetic fields, Magnets, Shapes, Torque, Design
Proceedings Papers

2D Motion Structures of N-Fold Rotational Symmetry

Zhiming Cui, Jaehyung Ju
Proc. ASME. IMECE2017, Volume 9: Mechanics of Solids, Structures and Fluids; NDE, Structural Health Monitoring and Prognosis, V009T12A012, November 3–9, 2017
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2017-70854
https://doi.org/10.1115/IMECE2017-70854
View Paper titled, 2D Motion Structures of N-Fold Rotational Symmetry
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Topics: Bifurcation, Density, Design, Kinematics, Mechanical properties, Poisson ratio, Structural analysis, Structural mechanics, Weight (Mass)
Proceedings Papers

Tunable Triangular Cellular Structures by Pneumatic Control of Dual Channel Actuators

Zhihao Yuan, Jaehyung Ju
Proc. ASME. IMECE2017, Volume 9: Mechanics of Solids, Structures and Fluids; NDE, Structural Health Monitoring and Prognosis, V009T12A013, November 3–9, 2017
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2017-70858
https://doi.org/10.1115/IMECE2017-70858
View Paper titled, Tunable Triangular Cellular Structures by Pneumatic Control of Dual Channel Actuators
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Topics: Actuators, Pneumatic control, Deformation, Design, Pneumatic actuators, Mechanical properties, Robotics, Smart materials, Computer programming, Density
Journal Articles

Thermomechanically Tunable Elastic Metamaterials With Compliant Porous Structures

Hyeonu Heo, Kwangwon Kim, Addis Tessema, Addis Kidane, Jaehyung Ju
Journal: Journal of Engineering Materials and Technology
Publisher: ASME
Article Type: Research-Article
J. Eng. Mater. Technol. April 2018, 140(2): 021004.
Paper No: MATS-17-1138
https://doi.org/10.1115/1.4038029
Published Online: October 27, 2017
View Article titled, Thermomechanically Tunable Elastic Metamaterials With Compliant Porous Structures
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Topics: Design, Hinges, Metamaterials, Temperature, Thermal deformation, Thermal expansion, Deformation, Bending (Stress), Thermomechanics
Proceedings Papers

Prediction of Hysteresis of a Thermoplastic Polyurethane Using Coarse-Grained Molecular Dynamics

Md Salah Uddin, Jaehyung Ju
Proc. ASME. IMECE2016, Volume 9: Mechanics of Solids, Structures and Fluids; NDE, Diagnosis, and Prognosis, V009T12A080, November 11–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2016-65903
https://doi.org/10.1115/IMECE2016-65903
View Paper titled, Prediction of Hysteresis of a Thermoplastic Polyurethane Using Coarse-Grained Molecular Dynamics
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Topics: Molecular dynamics, Urethane elastomers, Stress, Bulk modulus, Simulation, Compression, Deformation, Design, Errors, Mechanical properties
Journal Articles

Enhanced Coarse-Graining of Thermoplastic Polyurethane Elastomer for Multiscale Modeling

Md Salah Uddin, Jaehyung Ju
Journal: Journal of Engineering Materials and Technology
Publisher: ASME
Article Type: Research-Article
J. Eng. Mater. Technol. January 2017, 139(1): 011001.
Paper No: MATS-16-1041
https://doi.org/10.1115/1.4034328
Published Online: September 2, 2016
View Article titled, Enhanced Coarse-Graining of Thermoplastic Polyurethane Elastomer for Multiscale Modeling
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Topics: Bulk modulus, Chain, Deformation, Density, Design, Elastomers, Modeling, Multiscale modeling, Phase separation, Poisson ratio
Proceedings Papers

Thermal Stress Analysis of Gypsum Shell Cracking in Polyjet-Based Rapid Casting of Cellular Metals

Hyeonu Heo, Addis Tessema, Shaheer Iqbal, Jaehyung Ju, Addis Kidane
Proc. ASME. IMECE2015, Volume 2A: Advanced Manufacturing, V02AT02A016, November 13–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2015-52417
https://doi.org/10.1115/IMECE2015-52417
View Paper titled, Thermal Stress Analysis of Gypsum Shell Cracking in Polyjet-Based Rapid Casting of Cellular Metals
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Topics: Casting, Cracking (Materials), Fracture (Process), Gypsum, Metals, Shells, Thermal stresses, Additive manufacturing, Polymers, Thermal expansion
Proceedings Papers

Multilevel Metal Flow-Fill Analysis of Centrifugal Casting for Indirect Additive Manufacturing of Lattice Structures

Jiwon Mun, Matthew Busse, Jaehyung Ju, James Thurman
Proc. ASME. IMECE2015, Volume 2A: Advanced Manufacturing, V02AT02A011, November 13–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2015-52270
https://doi.org/10.1115/IMECE2015-52270
View Paper titled, Multilevel Metal Flow-Fill Analysis of Centrifugal Casting for Indirect Additive Manufacturing of Lattice Structures
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Topics: Additive manufacturing, Casting, Flow (Dynamics), Metals, Surface tension, Aluminum alloys, Copper alloys, Manufacturing, Solidification, Density
Proceedings Papers

Reconfigurable Compliant Cellular Material With Programmable Compliant Cellular Structure

Ye Kang, Kwangwon Kim, Jaehyung Ju
Proc. ASME. IMECE2015, Volume 9: Mechanics of Solids, Structures and Fluids, V009T12A044, November 13–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2015-52572
https://doi.org/10.1115/IMECE2015-52572
View Paper titled, Reconfigurable Compliant Cellular Material With Programmable Compliant Cellular Structure
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Topics: Additive manufacturing, Composite materials, Design, Dimensions, Elastomers, Engineers, Finite element analysis, Hinges, Mechanical properties, Modeling
Proceedings Papers

Hyperelastic Multi-Scale Modeling of a Thermoplastic Polyurethane Elastomer Using Molecular Mechanics

Md Salah Uddin, Jaehyung Ju, Zhenhai Xia
Proc. ASME. IMECE2015, Volume 9: Mechanics of Solids, Structures and Fluids, V009T12A061, November 13–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2015-50150
https://doi.org/10.1115/IMECE2015-50150
View Paper titled, Hyperelastic Multi-Scale Modeling of a Thermoplastic Polyurethane Elastomer Using Molecular Mechanics
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Topics: Elastomers, Molecular mechanics, Multiscale modeling, Urethane elastomers, Pressure, Simulation, Density, Shear (Mechanics), Chain, Deformation
Proceedings Papers

Continuum Model for Effective Properties of Orthotropic Octet-Truss Lattice Materials

Adithya Challapalli, Jaehyung Ju
Proc. ASME. IMECE2014, Volume 9: Mechanics of Solids, Structures and Fluids, V009T12A051, November 14–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2014-38925
https://doi.org/10.1115/IMECE2014-38925
View Paper titled, Continuum Model for Effective Properties of Orthotropic Octet-Truss Lattice Materials
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Topics: Trusses (Building), Additive manufacturing, Materials properties, Absorption, Acoustics, Constitutive equations, Energy dissipation, Heat, Heat exchangers, Insulation
Proceedings Papers

Three-Dimensional Compliant Cellular Materials: A Mechanism Based Material Design

Kwangwon Kim, Jaehyung Ju, Doo-Man Kim
Proc. ASME. IMECE2014, Volume 9: Mechanics of Solids, Structures and Fluids, V009T12A044, November 14–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2014-36567
https://doi.org/10.1115/IMECE2014-36567
View Paper titled, Three-Dimensional Compliant Cellular Materials: A Mechanism Based Material Design
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Topics: Design, Rotation, Aluminum alloys, Deformation, Displacement, Finite element analysis, Hinges, Honeycomb structures, Mechanical properties, Simulation
Proceedings Papers

Indirect Additive Manufacturing Based Casting (I AM Casting) of a Lattice Structure

Jiwon Mun, Jaehyung Ju, James Thurman
Proc. ASME. IMECE2014, Volume 2A: Advanced Manufacturing, V02AT02A011, November 14–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2014-38055
https://doi.org/10.1115/IMECE2014-38055
View Paper titled, Indirect Additive Manufacturing Based Casting (I AM Casting) of a Lattice Structure
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Topics: Additive manufacturing, Casting, Metals, Cathode ray oscilloscopes, Electron beams, Lasers, Manufacturing, Melting, Polymers, Solidification
Journal Articles

Compliant Cellular Materials With Elliptical Holes for Extremely High Positive and Negative Poisson's Ratios

Jaehong Lee, Kwangwon Kim, Jaehyung Ju, Doo-Man Kim
Journal: Journal of Engineering Materials and Technology
Publisher: ASME
Article Type: Research-Article
J. Eng. Mater. Technol. January 2015, 137(1): 011001.
Paper No: MATS-14-1072
https://doi.org/10.1115/1.4028317
Published Online: September 5, 2014
View Article titled, Compliant Cellular Materials With Elliptical Holes for Extremely High Positive and Negative Poisson's Ratios
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Topics: Bending (Stress), Deformation, Hinges, Stress, Poisson ratio, Simulation, Honeycomb structures, Yield strength, Design, Rotation
Proceedings Papers

Cellular Materials With Extremely High Negative and Positive Poisson’s Ratios: A Mechanism Based Material Design

Kwangwon Kim, Jaehyung Ju, Doo-Man Kim
Proc. ASME. IMECE2013, Volume 9: Mechanics of Solids, Structures and Fluids, V009T10A045, November 15–21, 2013
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2013-63598
https://doi.org/10.1115/IMECE2013-63598
View Paper titled, Cellular Materials With Extremely High Negative and Positive Poisson’s Ratios: A Mechanism Based Material Design
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Topics: Compliant mechanisms, Design, Porous materials, Deformation, Stiffness, Finite element analysis, Honeycomb structures, Aluminum alloys, Anisotropy, Bending (Stress)
Proceedings Papers

A Numerical Study of a Molten Aluminum for Investment Casting of 3D Cellular Metals

Jiwon Mun, Jaehyung Ju, Byoung-Gwan Yun, Byung-Moon Chang, Doo-Man Kim
Proc. ASME. IMECE2013, Volume 2A: Advanced Manufacturing, V02AT02A002, November 15–21, 2013
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2013-62847
https://doi.org/10.1115/IMECE2013-62847
View Paper titled, A Numerical Study of a Molten Aluminum for Investment Casting of 3D Cellular Metals
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Topics: Aluminum, Flow (Dynamics), Investment casting (Process), Investment castings, Metals, Solidification, Temperature, Viscosity
Proceedings Papers

An Experimental Study on the Mode I Fracture Behavior of Hexagonal Honeycombs

Md Salah Uddin, Jaehyung Ju, Nandika D’Souza
Proc. ASME. IMECE2013, Volume 9: Mechanics of Solids, Structures and Fluids, V009T10A047, November 15–21, 2013
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2013-64914
https://doi.org/10.1115/IMECE2013-64914
View Paper titled, An Experimental Study on the Mode I Fracture Behavior of Hexagonal Honeycombs
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Topics: Fracture (Materials), Honeycomb structures
Proceedings Papers

A Novel Compliant Fixation Plate for Bone Fractures

Kwangwon Kim, Jaehyung Ju, Doo-Man Kim
Proc. ASME. IMECE2012, Volume 2: Biomedical and Biotechnology, 117-125, November 9–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2012-88084
https://doi.org/10.1115/IMECE2012-88084
View Paper titled, A Novel Compliant Fixation Plate for Bone Fractures
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Topics: Bending (Stress), Bone fractures, Compliant mechanisms, Fracture (Materials), Fracture (Process), Bone, Compression, Stiffness, Stress, Elongation
Proceedings Papers

The Dynamic Properties of a Non-Pneumatic Tire With Flexible Auxetic Honeycomb Spokes

Chihun Lee, Jaehyung Ju, Doo-Man Kim
Proc. ASME. IMECE2012, Volume 8: Mechanics of Solids, Structures and Fluids, 605-615, November 9–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2012-88199
https://doi.org/10.1115/IMECE2012-88199
View Paper titled, The Dynamic Properties of a Non-Pneumatic Tire With Flexible Auxetic Honeycomb Spokes
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Topics: Finite element analysis, Honeycomb structures, Tires, Vibration