32 Result(s)
within
Sung** Lee
Engineering
Vibration, Dynamical Systems, Control
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Article
Investigation on the wear resistance of AISI 316L with micro dimples as a material for human implants’ structure
Over the past five decades, artificial hip joint materials, such as ceramic, titanium, and cobalt-chromium molybdenum alloy, with significantly improved wear resistance or biocompatibility have been developed ...
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Article
Expanded linear dynamic affect-expression model for lingering emotional expression in social robot
The service robot market is growing, and robots are replacing humans in many service industry jobs. Recently, as humans treat robots more emotionally and socially, designing robot emotions to improve human sat...
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Chapter and Conference Paper
Nonlinearity Study of Damaged Spring Materials Using Guided Wave
Nonlinear ultrasonic techniques that can detect micro crack or defects before use of ultrasonic nonlinearity are emerging as a way to predict the life of materials. Guided wave propagates according to the shap...
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Article
Erratum to “An enhanced prediction model for the on-line monitoring of the sensors using the Gaussian process regression”
There is one correction to make to the original article. Fig. 4 was published incorrectly. Fig. 4 has to be corrected as follows:
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Article
An enhanced prediction model for the on-line monitoring of the sensors using the Gaussian process regression
The auto-associative kernel regression (AAKR) and Gaussian process regression (GPR) have been used for estimating the condition of the sensors in the on-line monitoring system of the nuclear power plants. The ...
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Article
Anomaly detection of tripod shafts using modified Mahalanobis distance
The tripod shafts used in high-speed trains transmit the power of a motor to axle reduction units. A tripod shaft is designed as a shaft with a protective fuse because the load applied to the reduction units i...
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Article
Deviation based fault detection method for shackles under variable loading
Shackles used in lifting work are mainly subjected to fatigue loading during operation. The failure of the shackles can lead to catastrophic accidents and economic loss because they serve as a connection betwe...
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Article
Deep drawing behavior of twinning-induced plasticity-cored three-layer steel sheet
Herein, we report the results of our experimental and computational investigation of the deep drawing behavior of twinning-induced plasticity (TWIP)-cored three-layer steel sheet. Various directional tensile t...
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Chapter and Conference Paper
Analysis and Experimental Test of a 200 kW Oil-Free Micro Gas Turbine Simulator
This paper presents the measured rotordynamic performance and model predictions of a 200 kW oil-free micro gas turbine simulator (MGTS). The MGTS has a single spool configuration, and a gas generator rotor (GT...
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Article
Blank optimization for free bulging of Inconel 718 to maximize bulged height at high temperatures
Thickness profiled blank is designed via the optimization technique to maximize the bulged height in free bulging for Inconel 718. The thickness of the blank is described by the Bezier curve by using four cont...
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Article
Effect of divergence ratio on heat transfer and friction factor in the ribbed rectangular channel
The local heat transfer and pressure drop of turbulent flows developed in stationary ribbed rectangular divergent channels are experimentally investigated. The rectangular divergent channels with a one sided r...
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Article
Three-dimensional finite element analysis for estimation of the weld residual stress in the dissimilar butt weld pi**
Numerous dissimilar metal welds are used to connect carbon steel and stainless steel in nuclear power plants. Recently, some cracks have occurred in the dissimilar metal welds, and welding residual stress is c...
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Article
A study on the energy efficiency improvement of greenhouses — with a focus on the theoretical and experimental analyses
Most greenhouses in Korea are made according to European weather conditions, which leads to very low solar energy efficiency under the domestic weather conditions. Thus, greenhouses in Korea should be adapted ...
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Article
Material characterization of Inconel 718 from free bulging test at high temperature
Macroscopic superplastic behavior of metallic or non metallic materials is usually represented by the strain-rate sensitivity, and it can be determined by tensile tests in uniaxial stress state and bulging tes...
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Article
Coupled linkage system optimization for minimum power consumption
This paper presents the dynamic analysis and kinematic parameter optimization of a coupled linkage system for the purpose of employing the system in construction industry. So far, the kinematic optimization of...
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Article
The effect of change in width on stress distribution along the curved segments of stents
Curved structural members are widely seen in our surroundings, such as railway supports in playgrounds resembling a c-ring structure. The common geometry of the curved member consists of a segment of a circula...
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Article
Indentation experiment and analysis on mold and resin material during the nanoimprint process
Analysis and experiment on mold and resin materials for the nanoimprint process are conducted in this study. We developed FEM analysis of indentation stress induced in mold materials when they come in contact ...
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Article
Heat transfer analysis during a curing process for UV nanoimprint lithography
A heat transfer analysis during the curing process in UV-Nanoimprint lithography was carried out. To imprint nano/micro patterns into a large-area target glass such as LCD panels, a mold with a poly-urethane-a...
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Article
Application of Immersed Boundary Method for flow over stationary and oscillating cylinders
IBM (Immersed Boundary Method) with feedback momentum forcing was applied to stationary and moving bodies. The capability of IBM to treat the obstacle surfaces, especially with moving effect has been tested fo...
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Article
LP compressor blade vibration characteristics at starting conditions of a 100 MW heavy-duty gas turbine
In this paper are presented the blade vibration characteristics at the starting conditions of the low pressure multistage axial compressor of heavy-duty 100 MW gas turbine. Vibration data have been collected t...
