• 1977 Citations
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1988 …2019
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Research Output 1988 2019

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Article
2005
15 Citations (Scopus)

Dynamic analysis of a resonant comb-drive micro-actuator in linear and nonlinear regions

Jeong, H. M. & Ha, S. K., 2005 Oct 21, In : Sensors and Actuators, A: Physical. 125, 1, p. 59-68 10 p.

Research output: Contribution to journalArticle

Dynamic analysis
Actuators
actuators
Electrostatic force
harmonic motion
17 Citations (Scopus)

Effects of winding angles on through-thickness properties and residual strains of thick filament wound composite rings

Ha, S. & Jeong, J. Y., 2005 Jan 1, In : Composites Science and Technology. 65, 1, p. 27-35 9 p.

Research output: Contribution to journalArticle

Composite materials
Filament winding
Epoxy Resins
Epoxy resins
Impregnation
2004
11 Citations (Scopus)

Effects of rotor sizes and epoxy system on the process-induced residual strains within multi-ring composite rotors

Ha, S., Kim, H. T. & Han, S. C., 2004 Jun 7, In : Journal of Composite Materials. 38, 10, p. 871-885 15 p.

Research output: Contribution to journalArticle

Rotors
Composite materials
Graphite fibers
Glass fibers
Epoxy Resins
2003
5 Citations (Scopus)

Analysis of a Disk-Type Piezoelectric Ultrasonic Motor Using Impedance Matrices

Kim, Y. H. & Ha, S. K., 2003 Dec 1, In : IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 50, 12, p. 1667-1677 11 p.

Research output: Contribution to journalArticle

Acoustic impedance
ultrasonics
Ultrasonics
Stators
impedance
9 Citations (Scopus)

Analysis of a disk-type stator for the piezoelectric ultrasonic motor using impedance matrix

Kima, Y. H. & Ha, S. K., 2003 Jun 5, In : Journal of Sound and Vibration. 263, 3, p. 643-663 21 p.

Research output: Contribution to journalArticle

Acoustic impedance
stators
Stators
ultrasonics
Ultrasonics
15 Citations (Scopus)

Analysis of an asymmetrical piezoelectric annular bimorph using impedance and admittance matrices

Ha, S. & Kim, Y. H., 2003 Jan 1, In : Journal of the Acoustical Society of America. 110, 1, p. 208-215 8 p.

Research output: Contribution to journalArticle

electrical impedance
impedance
matrices
harmonic motion
variational principles
19 Citations (Scopus)

Analysis of a piezoelectric multimorph in extensional and flexural motions

Ha, S. & Kim, Y. H., 2003 Jun 20, In : Journal of Sound and Vibration. 253, 5, p. 1001-1014 14 p.

Research output: Contribution to journalArticle

Piezoelectric transducers
Multilayers
Trajectories
electrical impedance
matrices
2 Citations (Scopus)

Design of composite hip prostheses considering the long-term behavior of the femur

Lim, J. W., Jeong, J. Y. & Ha, S., 2003 Sep 1, In : JSME International Journal, Series C: Mechanical Systems, Machine Elements and Manufacturing. 46, 3, p. 991-999 9 p.

Research output: Contribution to journalArticle

Hip prostheses
Bone
Composite materials
Shielding
Subsidence
2001
20 Citations (Scopus)
electrical impedance
matrices
Actuators
actuators
lay-up
49 Citations (Scopus)
equivalent circuits
impedance
thickness ratio
inertia
finite element method
55 Citations (Scopus)
flywheels
Flywheels
plane strain
rotors
Rotors
2000
24 Citations (Scopus)

Effects of material properties on the total stored energy of a hybrid flywheel rotor

Ha, S., Yoon, Y. B. & Han, S. C., 2000 Jan 1, In : Archive of Applied Mechanics. 70, 8-9, p. 571-584 14 p.

Research output: Contribution to journalArticle

Flywheels
Materials properties
Rotors
Elastic moduli
Composite materials
61 Citations (Scopus)

Five-port equivalent electric circuit of piezoelectric bimorph beam

Cho, Y. S., Pak, Y. E., Han, C. S. & Ha, S. K., 2000 Aug 1, In : Sensors and Actuators, A: Physical. 84, 1, p. 140-148 9 p.

Research output: Contribution to journalArticle

Equivalent circuits
impedance
equivalent circuits
Networks (circuits)
Boundary conditions
14 Citations (Scopus)

Impedance and admittance matrices of symmetric piezoelectric annular bimorphs and their applications

Ha, S. & Kim, Y. H., 2000 Nov 25, In : Journal of the Acoustical Society of America. 108, 5 I, p. 2125-2133 9 p.

Research output: Contribution to journalArticle

electrical impedance
impedance
matrices
coverings
harmonic motion
1999
25 Citations (Scopus)
Wheels
Four wheel steering
Energy utilization
16 Citations (Scopus)

Optimal design of a hybrid composite flywheel with a permanent magnet rotor

Ha, S., Yang, H. I. & Kim, D. J., 1999 Jan 1, In : Journal of Composite Materials. 33, 16, p. 1544-1575 32 p.

Research output: Contribution to journalArticle

Flywheels
Permanent magnets
Rotors
Magnets
Composite materials
1998
42 Citations (Scopus)

Optimum design of thick-walled composite rings for an energy storage system

Ha, S., Jeong, H. M. & Cho, Y. S., 1998 Jan 1, In : Journal of Composite Materials. 32, 9, p. 851-873 23 p.

Research output: Contribution to journalArticle

Stiffness matrix
Energy storage
Rotors
Composite materials
Flywheels
1997
37 Citations (Scopus)

Composite hip prosthesis design. I. Analysis

Yildiz, H., Ha, S. & Chang, F. K., 1997 Jan 1, In : Journal of Biomedical Materials Research. 39, 1, p. 92-101 10 p.

Research output: Contribution to journalArticle

Hip prostheses
Composite materials
Bone
Fiber reinforced materials
Finite element method
1992
440 Citations (Scopus)

Finite element analysis of composite structures containing distributed piezoceramic sensors and actuators

Ha, S., Keilers, C. & Chang, F. K., 1992 Jan 1, In : AIAA Journal. 30, 3, p. 772-780 9 p.

Research output: Contribution to journalArticle

Composite structures
Potential energy
Actuators
Finite element method
Piezoelectric ceramics
1991
24 Citations (Scopus)

Analysis of Laminated Composites Containing Distributed Piezoelectric Ceramics

Ha, S., Keilers, C. & Chang, F. K., 1991 Jan 1, In : Journal of Intelligent Material Systems and Structures. 2, 1, p. 59-71 13 p.

Research output: Contribution to journalArticle

Piezoelectric ceramics
Laminated composites
Potential energy
Brick
Computer simulation
24 Citations (Scopus)

Modeling the viscoplastic behavior of fiber-reinforced thermoplastic matrix composites at elevated temperatures

Ha, S., Wang, Q. & Chang, F. K., 1991 Apr 1, In : Journal of Composite Materials. 25, 4, p. 375-390 16 p.

Research output: Contribution to journalArticle

Thermoplastics
Fibers
Composite materials
Temperature
Polyether ether ketones
15 Citations (Scopus)

Modeling the Viscoplastic Behavior of Fiber-Reinforced Thermoplastic Matrix Composites at Elevated Temperatures

Ha, S., Wang, Q. & Chang, F. K., 1991 Jan 1, In : Journal of Composite Materials. 25, 4, p. 334-374 41 p.

Research output: Contribution to journalArticle

Thermoplastics
Fibers
Composite materials
Temperature
Polyether ether ketones
1989
17 Citations (Scopus)

Nonlinear Mechanical Properties of a Thermoset Matrix Composite at Elevated Temperatures

Ha, S. K. & Springer, G. S., 1989 Nov, In : Journal of Composite Materials. 23, 11, p. 1130-1158 29 p.

Research output: Contribution to journalArticle

Thermosets
Mechanical properties
Composite materials
Poisson ratio
Laminates
39 Citations (Scopus)

Time Dependent Behavior of Laminated Composites at Elevated Temperatures

Ha, S. & Springer, G. S., 1989 Jan 1, In : Journal of Composite Materials. 23, 11, p. 1159-1197 39 p.

Research output: Contribution to journalArticle

Laminated composites
Temperature
Laminates
Graphite
Thermosets
1988
8 Citations (Scopus)

Nonlinear elastic properties of organic matrix composites at elevated temperatures

Ha, S. & Springer, G. S., 1988 Jan 1, In : Journal of Engineering Materials and Technology, Transactions of the ASME. 110, 2, p. 124-127 4 p.

Research output: Contribution to journalArticle

elastic properties
composite materials
Composite materials
matrices
stress-strain relationships