A5101825873- Fatigue and fracture mechanics
- Engineering Applied Research
- Welding Techniques and Residual Stresses
- Advanced Welding Techniques Analysis
- Structural Integrity and Reliability Analysis
- Hydrogen embrittlement and corrosion behaviors in metals
- Microstructure and Mechanical Properties of Steels
- Engineering Structural Analysis Methods
- Nuclear reactor physics and engineering
- Nuclear Materials and Properties
- Nuclear and radioactivity studies
- Structural Load-Bearing Analysis
- Mechanical Failure Analysis and Simulation
- Metallurgy and Material Forming
- Fluid Dynamics Simulations and Interactions
- Structural Health Monitoring Techniques
- Mechanical Behavior of Composites
- Spacecraft and Cryogenic Technologies
- High Temperature Alloys and Creep
- Mechanical stress and fatigue analysis
- High-Velocity Impact and Material Behavior
- Metal Forming Simulation Techniques
- Advanced Fiber Optic Sensors
- Ultrasonics and Acoustic Wave Propagation
- Polymer composites and self-healing
Pusan National University
2015-2024
Hyundai Heavy Industries (South Korea)
2019-2024
Samsung (South Korea)
2016-2024
Dankook University
2023-2024
Ehlers-Danlos Society
2022
The Welding Institute
2022
Korea Institute of Industrial Technology
2019
Hanjin Heavy Industries (South Korea)
2008-2019
Korea Institute of Machinery and Materials
2019
Dong-A University
2019
Molecular self-assembly commonly suffers from dense structural defect formation. Spontaneous annihilation in block copolymer (BCP) is particularly retarded due to significant energy barrier for polymer chain diffusion and reorganization. Here we present localized melting induced by blending short neutral random as an unusual method promote the BCP self-assembled nanopatterns. Chemically chains blended with BCPs are specifically induce local disordered states at sites Such "defect melting"...
In this paper, different evaluation methods of Hot Spot Stresses (HSS) have been applied to four welded structure details in order compare them and illustrate their differences. The HSSs at failure-critical locations were calculated by means a series finite element analyses. There was good overall agreement between experimentally determined HSS on the critical locations. While procedures exist for computation structural hot-spot stress joints, recommendations within International Institute...
Austenitic stainless steel, or the so-called transformation-induced plasticity exhibits high nonlinearity when strain-induced martensitic transformation occurs at various strain rates and temperatures, especially cryogenic temperatures rates. The strong hardening, which is caused by transformation, an important property of austenitic steel. In this work, a viscoplastic model that considers phase steel introduced in order to identify nonlinear mechanics, including hardening phenomenon....
In the present paper, sloshing resistance performance of a huge-size LNG carrier's insulation system is evaluated by fluid-structure interaction (FSI) analysis. To do this, global-local analysis which based on arbitrary Lagrangian-Eulerian (ALE) method adopted to accurately calculate structural behavior induced internal KC-1 type carrier system. During global analysis, flow and hydrodynamic pressure are analyzed postulating flexible as rigid body. addition, during local hydroelastic response...
One of the most important issues associated with liquefied natural gas (LNG) storage tanks, such as LNG carrier cargo tanks and land is their structural integrity. In order to ensure operating life safety used under conditions thermal cyclic loadings, securing evaluations for fatigue performance considered be particular importance. There have been various efforts reduce production costs optimum selection materials development new low temperature materials. This, motivation this study...
This study performed welding on various positions in the flat, overhead, and vertical down using a pulsed gas metal arc (P-GMAW) process. Despite same amount of heat input positions, characteristics varied depending positions. The effect gravity process determined different formation weld bead, influence molten pool behavior changed microstructure metal. current voltage signals were synchronized with high-speed camera data acquisition (DAQ) system. To induce one pulse drop (OPOD) transfer,...
We studied the arrangement of lamellar microdomains polystyrene-block-poly(methyl methacrylate) copolymer (PS-b-PMMA) confined in hemispherical cavities prepared by anodic aluminum oxide template. The have two controlled interfaces. One is cavity wall grafted with three different brushes (two selective made PMMA-OH and PS-OH one neutral brush PS-ran-PMMA-OH). other top surface covered films PMMA PS homopolymers PS-ran-PMMA copolymer. When cover film was to block components, parallel lamellae...
The aim of this study is to investigate the applicability automatic plasma arc welding (PAW) cryogenic materials used in liquefied natural gas (LNG) fuel storage tanks based on experimental data. mechanical properties were tested at room and temperatures fatigue fracture performances weld joints made by PAW. In addition, influence parameters welded such as material types temperature considered study. Based results obtained study, it was observed that all satisfied requirements each test....
In general, cylindrically curved plates are used in ships and offshore structures such as wind towers, spa structures, fore aft side shell plating, bilge circle parts merchant vessels. a number of studies, it has been shown that curvature increases the buckling strength plate under compressive loading, ultimate load-carrying capacity is also expected to increase. present paper, series elastic elastoplastic large deflection analyses were performed using commercial finite element analysis...
There is growing demand to reduce air pollution from shipping, and it expected that liquefied natural gas (LNG) will be widely adopted as a marine fuel in the near future. To design construct LNG-fueled vessels, of LNG tanks evaluation performance joints welded using low temperature materials should conducted advance.This study focuses on applicability 9 wt% nickel alloy steel material for tanks. The rule scantling process FE analysis initial an IMO type C independent tank were...