• 1980 Citations
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1988 …2019
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Research Output 1988 2019

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Article
Article
20 Citations (Scopus)
electrical impedance
matrices
Actuators
actuators
lay-up
1 Citation (Scopus)

A Green Route for Quick and Kilogram Production of Reduced Graphene Oxide and Their Applications at Low Loadings in Epoxy Resins

Tiwari, S. K., Nimbalkar, A. S., Hong, C. K. & Ha, S., 2019 Jan 31, In : ChemistrySelect. 4, 4, p. 1266-1274 9 p.

Research output: Contribution to journalArticle

Epoxy Resins
Graphite
Oxides
Zinc
Powders

A multi-scale approach to predict the impact resistance of braided composites using progress failure

Lei, X., Hayat, K. & Ha, S., 2017 Jan 1, In : Advanced Composites Letters. 26, 1, p. 24-29 6 p.

Research output: Contribution to journalArticle

Impact resistance
Micromechanics
Composite materials
Materials properties
Resins
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
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
49 Citations (Scopus)
equivalent circuits
impedance
thickness ratio
inertia
finite element method
1 Citation (Scopus)

A parametric study of skin laminates used in the composite layup of large-scale wind turbine blades

Hayat, K. & Ha, S., 2018 Mar 4, In : Advanced Composite Materials. 27, 2, p. 195-208 14 p.

Research output: Contribution to journalArticle

Wind turbines
Turbomachine blades
Laminates
Skin
Composite materials
2 Citations (Scopus)

Boosted electrochemical performance of TiO 2 decorated RGO/CNT hybrid nanocomposite by UV irradiation

De Adhikari, A., Tiwari, S. K., Ha, S. & Nayak, G. C., 2019 Feb 1, In : Vacuum. 160, p. 421-428 8 p.

Research output: Contribution to journalArticle

Nanocomposites
nanocomposites
Capacitance
capacitance
carbon nanotubes
1 Citation (Scopus)

Characterization of moisture effect on static and fatigue performance of epoxy resin using thin-film specimen on dynamic mechanical analyzer

Huang, Y., Zhu, Y., Cimini, C. A. & Ha, S., 2017 Feb 1, In : Journal of Composite Materials. 51, 3, p. 303-314 12 p.

Research output: Contribution to journalArticle

Epoxy Resins
Epoxy resins
Moisture
Fatigue of materials
Thin films
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
7 Citations (Scopus)

Design and fabrication of hybrid composite hubs for a multi-rim flywheel energy storage system

Kim, S. J., Hayat, K., Nasir, S. U. & Ha, S., 2014 Jan 1, In : Composite Structures. 107, 1, p. 19-29 11 p.

Research output: Contribution to journalArticle

Flywheels
Energy storage
Rotors
Fabrication
Composite materials
16 Citations (Scopus)

Design and manufacture of a composite flywheel press-fit multi-rim rotor

Ha, S., Han, H. H. & Han, Y. H., 2008 Jun 1, In : Journal of Reinforced Plastics and Composites. 27, 9, p. 953-965 13 p.

Research output: Contribution to journalArticle

Flywheels
Rotors
Composite materials
Graphite
Glass
27 Citations (Scopus)

Design and spin test of a hybrid composite flywheel rotor with a split type hub

Ha, S., Kim, M. H., Han, S. C. & Sung, T-H., 2006 Dec 1, In : Journal of Composite Materials. 40, 23, p. 2113-2130 18 p.

Research output: Contribution to journalArticle

Flywheels
Rotors
Composite materials
Tensile stress
Safety factor
17 Citations (Scopus)

Design of a hybrid composite flywheel multi-rim rotor system using geometric scaling factors

Ha, S. K., Kim, J. H. & Han, Y. H., 2008 Apr 1, In : Journal of Composite Materials. 42, 8, p. 771-785 15 p.

Research output: Contribution to journalArticle

Flywheels
Rotors
Composite materials
Energy storage
Curing
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
22 Citations (Scopus)

Design optimization and fabrication of a hybrid composite flywheel rotor

Ha, S., Kim, S. J., Nasir, S. U. & Han, S. C., 2012 Nov 1, In : Composite Structures. 94, 11, p. 3290-3299 10 p.

Research output: Contribution to journalArticle

Flywheels
Rotors
Fabrication
Composite materials
Filament winding
60 Citations (Scopus)

Distribution of micro stresses and interfacial tractions in unidirectional composites

Jin, K. K., Huang, Y., Lee, Y. H. & Ha, S. K., 2008 Sep 1, In : Journal of Composite Materials. 42, 18, p. 1825-1849 25 p.

Research output: Contribution to journalArticle

Composite materials
Fibers
Diamond
Amplification
Macros
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
34 Citations (Scopus)

Effect of fiber arrangement on residual thermal stress distributions in a unidirectional composite

Jin, K. K., Oh, J. H. & Ha, S. K., 2007 Mar 1, In : Journal of Composite Materials. 41, 5, p. 591-611 21 p.

Research output: Contribution to journalArticle

Thermal stress
Stress concentration
Residual stresses
Fibers
Composite materials
69 Citations (Scopus)

Effect of fiber array irregularities on microscopic interfacial normal stress states of transversely loaded UD-CFRP from viewpoint of failure initiation

Hojo, M., Mizuno, M., Hobbiebrunken, T., Adachi, T., Tanaka, M. & Ha, S. K., 2009 Sep 1, In : Composites Science and Technology. 69, 11-12, p. 1726-1734 9 p.

Research output: Contribution to journalArticle

Carbon fiber reinforced plastics
Fibers
Cooling
Carbon fibers
Curing
12 Citations (Scopus)

Effect of shallow-angled skins on the structural performance of the large-scale wind turbine blade

Ha, S., Hayat, K. & Xu, L., 2014 Jan 1, In : Renewable Energy. 71, p. 100-112 13 p.

Research output: Contribution to journalArticle

Wind turbines
Turbomachine blades
Skin
Buckling
Bending (deformation)
11 Citations (Scopus)

Effects of an open hole on the biaxial strengths of composite laminates

Huang, Y., Ha, S., Koyanagi, J., Melo, J. D. D., Kumazawa, H. & Susuki, I., 2010 Sep 1, In : Journal of Composite Materials. 44, 20, p. 2429-2445 17 p.

Research output: Contribution to journalArticle

Laminates
Composite materials
Finite element method
Micromechanics
Gages
72 Citations (Scopus)

Effects of fiber arrangement on mechanical behavior of unidirectional composites

Huang, Y., Jin, K. K. & Ha, S., 2008 Sep 1, In : Journal of Composite Materials. 42, 18, p. 1851-1871 21 p.

Research output: Contribution to journalArticle

Fibers
Composite materials
Weibull distribution
Probability distributions
Finite element method
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
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
1 Citation (Scopus)

Effects of shallow angle on static strength and fatigue life of multi-directional laminates for wind turbine blades

Ha, S., de Lece, A. G. M., Donazar Moriones, C., Cimini Junior, C. A. & Jin, C., 2017 Aug 1, In : Journal of Composite Materials. 51, 18, p. 2549-2563 15 p.

Research output: Contribution to journalArticle

Wind turbines
Turbomachine blades
Laminates
Fatigue of materials
Compressive strength
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

Fatigue Life of Megawatt-Scale Composite Wind Turbine Blades with Shallow-Angled Laminates

Hayat, K., Ha, S. K., Sultan, T. & Ahmad, Z., 2019 Jan 1, (Accepted/In press) In : Mechanics of Composite Materials.

Research output: Contribution to journalArticle

Turbine Blade
turbine blades
wind turbines
fatigue life
Laminates
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
86 Citations (Scopus)
Elastomers
Spine
Prostheses and Implants
Elastic Modulus
Intervertebral Disc
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
22 Citations (Scopus)

Flutter performance of bend-twist coupled large-scale wind turbine blades

Hayat, K., De Lecea, A. G. M., Moriones, C. D. & Ha, S., 2016 May 26, In : Journal of Sound and Vibration. 370, p. 149-162 14 p.

Research output: Contribution to journalArticle

flutter
turbine blades
wind turbines
Wind turbines
Turbomachine blades
6 Citations (Scopus)

Flutter performance of large-scale wind turbine blade with shallow-angled skins

Hayat, K. & Ha, S., 2015 Nov 5, In : Composite Structures. 132, p. 575-583 9 p.

Research output: Contribution to journalArticle

Wind turbines
Turbomachine blades
Skin
Stiffness
Fibers
1 Citation (Scopus)

Forced vibration modeling of rail considering shear deformation and moving magnetic load

Kim, J. S., Kim, S. J., Lee, H., Ha, S. & Lee, Y. H., 2013 Jan 1, In : Transactions of the Korean Society of Mechanical Engineers, A. 37, 12, p. 1547-1557 11 p.

Research output: Contribution to journalArticle

Shear deformation
Rails
Stiffness
Dynamic response
Damping
25 Citations (Scopus)
Wheels
Four wheel steering
Energy utilization

Fracture analysis and mechanical properties of three phased glass/epoxy laminates reinforced with multiwalled carbon nanotubes

Behera, R. P., Rawat, P., Singh, K. K., Ha, S., Gaurav, A. & Tiwari, S. K., 2019 Jun 1, In : Journal of Science: Advanced Materials and Devices. 4, 2, p. 299-309 11 p.

Research output: Contribution to journalArticle

Open Access
Multiwalled carbon nanotubes (MWCN)
Laminates
Carbon
Glass
Mechanical properties
1 Citation (Scopus)

Geometrical range of microscopic stress distribution change due to fibre array irregularities for thermally and transversely loaded CF/epoxy composites

Hojo, M., Mizuno, M., Hobbiebrunken, T., Adachi, T., Tanaka, M. & Ha, S. K., 2010 Mar 1, In : Plastics, Rubber and Composites. 39, 2, p. 99-106 8 p.

Research output: Contribution to journalArticle

Stress concentration
Fibers
Composite materials
Resins
Curing
35 Citations (Scopus)

Impact damage resistance of sandwich structure subjected to low velocity impact

Park, J. H., Ha, S., Kang, K. W., Kim, C. W. & Kim, H. S., 2008 May 26, In : Journal of Materials Processing Technology. 201, 1-3, p. 425-430 6 p.

Research output: Contribution to journalArticle

Sandwich structures
Acoustic microscopes
Impact testing
Impact resistance
Fiber reinforced materials
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
19 Citations (Scopus)

Influence of non-uniform fiber arrangement on microscopic stress and failure initiation in thermally and transversely loaded CF/epoxy laminated composites

Hobbiebrunken, T., Hojo, M., Jin, K. K. & Ha, S., 2008 Dec 1, In : Composites Science and Technology. 68, 15-16, p. 3107-3113 7 p.

Research output: Contribution to journalArticle

Laminated composites
Fibers
Failure analysis
Stress concentration
Finite element method

Innovative additive manufacturing of composites

Ha, S., 2014 Jan 1, JEC Composites Magazine, 51, 86, p. 49-52 4 p.

Research output: Contribution to specialist publicationArticle

3D printers
Composite materials

Innovative design of wind turbine blades based on micromechanics of failure

Ha, S., 2011 Jan 1, JEC Composites Magazine, 48, 68, p. 78-80 3 p.

Research output: Contribution to specialist publicationArticle

Micromechanics
Wind turbines
Wind power
Turbomachine blades

Innovative design procedures for large-scale wind turbine blades

Ha, S., 2012 Jan 1, JEC Composites Magazine, 49, 70, p. 39-45 7 p.

Research output: Contribution to specialist publicationArticle

Wind turbines
Turbomachine blades
28 Citations (Scopus)

Interfacial strain distribution of a unidirectional composite with randomly distributed fibers under transverse loading

Oh, J. H., Jin, K. K. & Ha, S., 2006 May 1, In : Journal of Composite Materials. 40, 9, p. 759-778 20 p.

Research output: Contribution to journalArticle

Fibers
Composite materials
Shear strain
Fourier series
Volume fraction
25 Citations (Scopus)

Load mitigation of wind turbine blade by aeroelastic tailoring via unbalanced laminates composites

Hayat, K. & Ha, S., 2015 Sep 5, In : Composite Structures. 128, p. 122-133 12 p.

Research output: Contribution to journalArticle

Wind turbines
Turbomachine blades
Laminates
Skin
Composite materials
28 Citations (Scopus)

Long-term fatigue strength prediction of CFRP structure based on micromechanics of failure

Cai, H., Miyano, Y., Nakada, M. & Ha, S., 2008 Apr 1, In : Journal of Composite Materials. 42, 8, p. 825-844 20 p.

Research output: Contribution to journalArticle

Micromechanics
Carbon fiber reinforced plastics
Testing
Temperature
Resins
8 Citations (Scopus)
Guided electromagnetic wave propagation
Delamination
Composite materials
Viscoelasticity
Surface waves