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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
Paper No: IMECE2017-70854
DOI: https://doi.org/10.1115/IMECE2017-70854
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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
Paper No: IMECE2017-70858
DOI: https://doi.org/10.1115/IMECE2017-70858
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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
Article Type: Research-Article
J. Eng. Mater. Technol. April 2018, 140(2): 021004.
Paper No: MATS-17-1138
DOI: https://doi.org/10.1115/1.4038029
Published Online: October 27, 2017
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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
Paper No: IMECE2016-65903
DOI: https://doi.org/10.1115/IMECE2016-65903
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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
Article Type: Research-Article
J. Eng. Mater. Technol. January 2017, 139(1): 011001.
Paper No: MATS-16-1041
DOI: https://doi.org/10.1115/1.4034328
Published Online: September 2, 2016
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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
Paper No: IMECE2015-52417
DOI: https://doi.org/10.1115/IMECE2015-52417
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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
Paper No: IMECE2015-52270
DOI: https://doi.org/10.1115/IMECE2015-52270
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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
Paper No: IMECE2015-52572
DOI: https://doi.org/10.1115/IMECE2015-52572
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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
Paper No: IMECE2015-50150
DOI: https://doi.org/10.1115/IMECE2015-50150
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Topics: Elastomers, Molecular mechanics, Multiscale modeling, Urethane elastomers, Pressure, Simulation, Density, Shear (Mechanics), Chain, Deformation
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
Paper No: IMECE2014-38055
DOI: https://doi.org/10.1115/IMECE2014-38055
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Topics: Additive manufacturing, Casting, Metals, Cathode ray oscilloscopes, Electron beams, Lasers, Manufacturing, Melting, Polymers, Solidification
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
Paper No: IMECE2014-38925
DOI: https://doi.org/10.1115/IMECE2014-38925
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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
Paper No: IMECE2014-36567
DOI: https://doi.org/10.1115/IMECE2014-36567
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Topics: Design, Rotation, Aluminum alloys, Deformation, Displacement, Finite element analysis, Hinges, Honeycomb structures, Mechanical properties, Simulation
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
Article Type: Research-Article
J. Eng. Mater. Technol. January 2015, 137(1): 011001.
Paper No: MATS-14-1072
DOI: https://doi.org/10.1115/1.4028317
Published Online: September 5, 2014
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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
Paper No: IMECE2013-63598
DOI: https://doi.org/10.1115/IMECE2013-63598
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Topics: Compliant mechanisms, Design, Porous materials, Deformation, Stiffness, Finite element analysis, Honeycomb structures, Aluminum alloys, Anisotropy, Bending (Stress)
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
Paper No: IMECE2013-64914
DOI: https://doi.org/10.1115/IMECE2013-64914
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Topics: Fracture (Materials), Honeycomb structures
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
Paper No: IMECE2013-62847
DOI: https://doi.org/10.1115/IMECE2013-62847
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Topics: Aluminum, Flow (Dynamics), Investment casting (Process), Investment castings, Metals, Solidification, Temperature, Viscosity
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
Paper No: IMECE2012-88199
DOI: https://doi.org/10.1115/IMECE2012-88199
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Topics: Finite element analysis, Honeycomb structures, Tires, Vibration
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
Paper No: IMECE2012-88084
DOI: https://doi.org/10.1115/IMECE2012-88084
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Topics: Bending (Stress), Bone fractures, Compliant mechanisms, Fracture (Materials), Fracture (Process), Bone, Compression, Stiffness, Stress, Elongation
Proceedings Papers

Lateral Stiffness and Dynamic Properties of Separable Polyurethane Tires for a Folding Bike

Sarom Ryu, Jaehyung Ju, Doo-Man Kim, Jin-Kyu Kim
Proc. ASME. IDETC-CIE2012, Volume 6: 1st Biennial International Conference on Dynamics for Design; 14th International Conference on Advanced Vehicle Technologies, 511-516, August 12–15, 2012
Paper No: DETC2012-70677
DOI: https://doi.org/10.1115/DETC2012-70677
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Topics: Bicycles, Stiffness, Tires, Urethane elastomers, Wheels
Proceedings Papers

A Study on the Aerodynamic Drag of a Non-Pneumatic Tire

Hyeonu Heo, Jaehyung Ju, Doo-Man Kim, Sangwa Rhie
Proc. ASME. IDETC-CIE2012, Volume 6: 1st Biennial International Conference on Dynamics for Design; 14th International Conference on Advanced Vehicle Technologies, 517-521, August 12–15, 2012
Paper No: DETC2012-70718
DOI: https://doi.org/10.1115/DETC2012-70718
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Topics: Drag (Fluid dynamics), Reynolds-averaged Navier–Stokes equations, Tires