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Journal Articles

A Differential Stress-Strain Relation for the Hexagonal Close-Packed Array of Elastic Spheres

J. Duffy
Journal: Journal of Applied Mechanics
Publisher: ASME
Article Type: Research Papers
J. Appl. Mech. March 1959, 26(1): 88–94.
https://doi.org/10.1115/1.4011927
Published Online: June 23, 2021
View Article titled, A Differential Stress-Strain Relation for the Hexagonal Close-Packed Array of Elastic Spheres
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Topics: Stress-strain relations
Journal Articles

Stress-Strain Relations and Vibrations of a Granular Medium

J. Duffy, R. D. Mindlin
Journal: Journal of Applied Mechanics
Publisher: ASME
Article Type: Research Papers
J. Appl. Mech. December 1957, 24(4): 585–593.
https://doi.org/10.1115/1.4011605
Published Online: June 10, 2021
View Article titled, Stress-Strain Relations and Vibrations of a Granular Medium
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Topics: Stress-strain relations, Vibration, Energy dissipation, Waves
Proceedings Papers

Maximum Frequency Design of Prestressed Symmetric, Cross-Ply Laminates of Hybrid Construction

K. J. Duffy, S. Adali
Proc. ASME. DETC91, 17th Design Automation Conference: Volume 2 — Computer-Aided Design, Mechanical Systems Simulation, and Analysis, Mechanisms, and Robotics, 477-484, September 22–25, 1991
Publisher: American Society of Mechanical Engineers
Paper No: DETC1991-0153
https://doi.org/10.1115/DETC1991-0153
View Paper titled, Maximum Frequency Design of Prestressed Symmetric, Cross-Ply Laminates of Hybrid Construction
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Topics: Construction, Design, Laminates, Stiffness, Fibers, Glass, Graphite, Separation (Technology), Stress
Proceedings Papers

Closed-Form Forward Displacement Analyses of the 4-5 In-Parallel Platforms

W. Lin, Carl D. Crane, III, J. Duffy
Proc. ASME. DETC92, 22nd Biennial Mechanisms Conference: Robotics, Spatial Mechanisms, and Mechanical Systems, 521-527, September 13–16, 1992
Publisher: American Society of Mechanical Engineers
Paper No: DETC1992-0254
https://doi.org/10.1115/DETC1992-0254
View Paper titled, Closed-Form Forward Displacement Analyses of the 4-5 In-Parallel Platforms
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Topics: Displacement, Polynomials
Proceedings Papers

Stiffness Mappings Employing Different Frames of Reference

T. Pigoski, M. Griffis, J. Duffy
Proc. ASME. DETC92, 22nd Biennial Mechanisms Conference: Flexible Mechanisms, Dynamics, and Analysis, 445-452, September 13–16, 1992
Publisher: American Society of Mechanical Engineers
Paper No: DETC1992-0411
https://doi.org/10.1115/DETC1992-0411
View Paper titled, Stiffness Mappings Employing Different Frames of Reference
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Topics: Stiffness, Compliant mechanisms, Potential energy, Symmetry (Physics)
Proceedings Papers

The Inverse Force Analysis of a Four-Bar Mechanism With Compliant Input and Output Links

J. P. Yin, G. K. Matthew, J. Duffy
Proc. ASME. DETC-CIE96, Volume 2B: 24th Biennial Mechanisms Conference, V02BT02A040, August 18–22, 1996
Publisher: American Society of Mechanical Engineers
Paper No: 96-DETC/MECH-1141
https://doi.org/10.1115/96-DETC/MECH-1141
View Paper titled, The Inverse Force Analysis of a Four-Bar Mechanism With Compliant Input and Output Links
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Topics: Algebra, Displacement, Polynomials, Springs
Proceedings Papers

Catastrophe Analysis of Planar Three-Spring Systems

J. P. Yin, D. Marsh, J. Duffy
Proc. ASME. DETC98, Volume 1B: 25th Biennial Mechanisms Conference, V01BT01A029, September 13–16, 1998
Publisher: American Society of Mechanical Engineers
Paper No: DETC98/MECH-5919
https://doi.org/10.1115/DETC98/MECH-5919
View Paper titled, Catastrophe Analysis of Planar Three-Spring Systems
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Topics: Springs, Design, Force control, Stability
Proceedings Papers

A Micro-Combined Heat and Power Laboratory for Experiments in Applied Thermodynamics

John D. Flotterud, Christopher J. Damm, Benjamin J. Steffes, Jennifer J. Pfaff, Matthew J. Duffy, Michael A. Kaiser
Proc. ASME. IMECE2011, Volume 5: Engineering Education and Professional Development, 233-240, November 11–17, 2011
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2011-62615
https://doi.org/10.1115/IMECE2011-62615
View Paper titled, A Micro-Combined Heat and Power Laboratory for Experiments in Applied Thermodynamics
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Topics: Combined heat and power, Heat, Thermodynamics
Journal Articles

The Optimum Quality Index for the Stability of In-Parallel Planar Platform Devices

J. Lee, J. Duffy, M. Keler
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research Papers
J. Mech. Des. March 1999, 121(1): 15–20.
https://doi.org/10.1115/1.2829417
Published Online: March 1, 1999
View Article titled, The Optimum Quality Index for the Stability of In-Parallel Planar Platform Devices
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Topics: Design, Jacobian matrices, Shapes, Stability
Journal Articles

Investigation of a Special 6-6 Parallel Platform for Contour Milling

W. A. Abbasi, S. C. Ridgeway, P. D. Adsit, C. D. Crane, J. Duffy
Journal: Journal of Manufacturing Science and Engineering
Publisher: ASME
Article Type: Technical Papers
J. Manuf. Sci. Eng. February 2000, 122(1): 132–139.
https://doi.org/10.1115/1.538927
Published Online: January 1, 1998
View Article titled, Investigation of a Special 6-6 Parallel Platform for Contour Milling
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Topics: Actuators, Deflection, Design, Milling, Cutting, Stiffness
Journal Articles

An Inverse Force Analysis of a Planar Two-Spring System

T. M. Pigoski, J. Duffy
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research Papers
J. Mech. Des. December 1995, 117(4): 548–553.
https://doi.org/10.1115/1.2826717
Published Online: December 1, 1995
View Article titled, An Inverse Force Analysis of a Planar Two-Spring System
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Topics: Springs, Manufacturing, Polynomials, Stability, Stiffness, Stress
Journal Articles

On the Metrics of Rigid Body Displacements for Infinite and Finite Bodies

J. M. R. Martinez, J. Duffy
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research Papers
J. Mech. Des. March 1995, 117(1): 41–47.
https://doi.org/10.1115/1.2826115
Published Online: March 1, 1995
View Article titled, On the Metrics of Rigid Body Displacements for Infinite and Finite Bodies
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Topics: Displacement, Kinematics
Journal Articles

Repeatable Joint Displacement Generation for Redundant Robotic Systems

Y. S. Chung, M. Griffis, J. Duffy
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research Papers
J. Mech. Des. March 1994, 116(1): 11–16.
https://doi.org/10.1115/1.2919335
Published Online: March 1, 1994
View Article titled, Repeatable Joint Displacement Generation for Redundant Robotic Systems
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Topics: Displacement, End effectors, Kinematics, Manipulators, Redundant manipulators, Robotics, Springs, Stiffness
Journal Articles

Closed-Form Forward Displacement Analysis of the 4–5 In-Parallel Platforms

Wei Lin, C. D. Crane, III, J. Duffy
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research Papers
J. Mech. Des. March 1994, 116(1): 47–53.
https://doi.org/10.1115/1.2919375
Published Online: March 1, 1994
View Article titled, Closed-Form Forward Displacement Analysis of the 4–5 In-Parallel Platforms
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Topics: Displacement, Polynomials
Journal Articles

The Geometry of Interference With Application to Obstacle Avoidance

Y. J. Choi, C. D. Crane, III, G. K. Matthew, J. Duffy
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research Papers
J. Mech. Des. June 1993, 115(2): 300–305.
https://doi.org/10.1115/1.2919192
Published Online: June 1, 1993
View Article titled, The Geometry of Interference With Application to Obstacle Avoidance
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Topics: Collisions (Physics), Displacement, Geometry, Robots
Journal Articles

Autonomous Rectilinear Motion Planning for a Spatial Robot: Path Planning for a Spatial 4R Manipulator With a Single Spherical Obstacle Inside the Workspace

Menq-Dar Shieh, J. Duffy
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research Papers
J. Mech. Des. December 1992, 114(4): 559–563.
https://doi.org/10.1115/1.2917043
Published Online: December 1, 1992
View Article titled, Autonomous Rectilinear Motion Planning for a Spatial Robot: Path Planning for a Spatial 4R Manipulator With a Single Spherical Obstacle Inside the Workspace
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Topics: Manipulators, Path planning, Robots, Algorithms, End effectors, Collisions (Physics), Silicon
Journal Articles

Forward Displacement Analyses of the 4-4 Stewart Platforms

W. Lin, M. Griffis, J. Duffy
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research Papers
J. Mech. Des. September 1992, 114(3): 444–450.
https://doi.org/10.1115/1.2926572
Published Online: September 1, 1992
View Article titled, Forward Displacement Analyses of the 4-4 Stewart Platforms
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Topics: Displacement, Polynomials
Journal Articles

Kinestatic Control: A Novel Theory for Simultaneously Regulating Force and Displacement

M. Griffis, J. Duffy
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research Papers
J. Mech. Des. December 1991, 113(4): 508–515.
https://doi.org/10.1115/1.2912812
Published Online: December 1, 1991
View Article titled, Kinestatic Control: A Novel Theory for Simultaneously Regulating Force and Displacement
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Topics: Displacement, Stiffness, End effectors, Manipulators, Parallel mechanisms, Screws
Journal Articles

Closure to “Discussion of ‘A Method for Dynamic Fracture Initiation Testing of Ceramics’” (1991, ASME J. Eng. Mater. Technol., 113, pp. 183–185)

J. Duffy, S. Suresh, R. Cho, E. R. Boff
Journal: Journal of Engineering Materials and Technology
Publisher: ASME
Article Type: Discussions
J. Eng. Mater. Technol. January 1991, 113(1): 185–186.
https://doi.org/10.1115/1.2903377
Published Online: January 1, 1991
View Article titled, Closure to “Discussion of ‘A Method for Dynamic Fracture Initiation Testing of Ceramics’” (1991, ASME J. Eng. Mater. Technol., 113, pp. 183–185)
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Topics: Fracture (Materials), Fracture (Process), Testing
Journal Articles

A Representation of the Euclidean Group by Spin Groups, and Spatial Kinematics Mappings

J. M. Rico, J. Duffy
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research Papers
J. Mech. Des. March 1990, 112(1): 42–49.
https://doi.org/10.1115/1.2912577
Published Online: March 1, 1990
View Article titled, A Representation of the Euclidean Group by Spin Groups, and Spatial Kinematics Mappings
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Topics: Kinematics, Particle spin, Rotation, Spin (Aerodynamics), Algebra, Space