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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society of Safety
Journal Basic Information
Journal DOI :
The Korean Society Safety
Editor in Chief :
Volume & Issues
Volume 23, Issue 6 - Dec 2008
Volume 23, Issue 5 - Oct 2008
Volume 23, Issue 4 - Aug 2008
Volume 23, Issue 3 - Jun 2008
Volume 23, Issue 2 - Apr 2008
Volume 23, Issue 1 - Feb 2008
Selecting the target year
Strength Evaluation of A Failed A53B Carbon Steel Pipe with Small Punch Test and Finite Element Analysis
Lee, Joon-Won ; Kim, Maan-Won ; Shin, Kyu-In ; Park, Jai-Hak ;
Journal of the Korean Society of Safety , volume 23, issue 1, 2008, Pages 1~11
In this study, small punch test and tensile test were performed with specimens directly machined from an ASTM A53 grade B carbon steel pipe at which an explosion accident was occurred in the Heavy Oil Unit. Main damage mechanism of the pipe was known as a high temperature hydrogen attack(HTHA). Effects of HTHA on the mechanical strength change of the A53B steel were studied in detail. Small punch test results have showed that maximum reaction forces, SP energy and ductility were decreased at hydrogen attacked part of the pipe compared with sound part of the pipe. Yield strength and tensile ultimate strength were calculated with the obtained small punch test curve results using different methods and compared the estimation methods. Small punch test simulation has been also performed with the finite element method and then mechanical strength, equivalent strain and fracture toughness were calculated with the obtained numerical analysis results. It was shown that the fracture toughness data calculated from small punch equivalent energy obtained by the finite element analysis for SP test was very low at the hydrogen attacked part.
Frature Toughness Characteristics of Surface-Hardened SM53C Steel by High Frequency Induction
Park, Won-Jo ; Jeon, Hyun-Bae ; Hur, Chung-Weon ; Kim, Jin-Bum ;
Journal of the Korean Society of Safety , volume 23, issue 1, 2008, Pages 12~17
The earn shaft is very important for the safety of automobiles. The earn shaft needs a surface hardening process by high frequency induction to have both strength and toughness. It is required for safety of automobile to consider how the characteristics of tensile strength and toughness are changed according to the condition of surface hardness. In this study, we prepared surface hardened SM53C which is used as cam shaft materials. We examined the tensile strengths according to the depth of surface hardening and the effect of tempering. We also investigated the fracture toughnesses according to the depth of surface hardening(1mm, 2mm).
A Study on Wear Characteristics of Surface-Hardened SM53C Steel by High Frequency Induction
Park, Won-Jo ; Song, Tae-Hoon ; Hur, Chung-Weon ; Song, Hong-Tae ;
Journal of the Korean Society of Safety , volume 23, issue 1, 2008, Pages 18~23
The abnormal wears such as unfair-wear and early-wear happen in the earn shaft surface of automobiles. These abnormal wears make efficiency of engines decrease and threaten safety of automobiles. The wear characteristics of the cam shaft is very important for the automobile safety. The cam shaft is surface-hardened by the high frequency induction. In this study, we investigated the wear characteristics of the hardened surface with a SM53C steel. The wear characteristics is examined according to the hardened depth and the amount of load.
An Experimental Study on Characteristics of the Residential Container Building Fire
Lee, Jung-Yun ; Jung, Ki-Chang ; Kim, Hong ;
Journal of the Korean Society of Safety , volume 23, issue 1, 2008, Pages 24~27
The recent fire incident in an elementary school of Chonan city causes the media focus on the fire safety of residential container buildings. In this study, real fire tests were conducted in this kind of buildings. Fire temperature and radiant heat flux were measured, in order to investigate the hazard-reduction effects during the fire emergency of residential container buildings. According to the test results, flash over occur in 10 minutes, peak fire temperature was
, peak radiant heat flux was
at 8minutes after residential container building fire.
Safety Assessment to Construction Position of Constructed Steel Structures under Declinating Earth Pressure
Lee, Sang-Hyun ; Lim, Heui-Dae ;
Journal of the Korean Society of Safety , volume 23, issue 1, 2008, Pages 28~34
The corrugated steel plate structures is applied to the construction of mountain tunnel portal part with shallow depth, the tunnel on the outskirts of urban areas and ecology move passage. In this study, A finite element method is used for research the behavior of corrugated steel plate structures due to construction position under declinating earth pressure and excavation depth. A finite element method were performed varying construction position(10, 15, 20 and 25m) from slope and excavation depth from surface. The hoop thrust and moment, displacement of corrugated steel plate subjected to construction position and excavation depth is determined from a finite element method. From results of finite element method, it was found that the increase of thrust and the decrease of displacement as the amount of distance increase from slope with construction position. But the thrust and moment, displacement has not different value with excavation depth.
A Study on the Kinematic Variables in Different Safety Shoes and Applying Insole During Walking
Kim, Jung-Jin ; Choi, Sang-Bock ; Cha, Sang-Eon ;
Journal of the Korean Society of Safety , volume 23, issue 1, 2008, Pages 35~45
This study was performed to compare the kinematics among three different safety shoes(type 1: ergonomically designed and high quality shoes, 2: curved and cushioned safety shoes, and 3: regular safety shoes) and to find the effect of insole during walking. Ten healthy subjects were recruited for this study. The range of motion of knee and ankle joint, angle of rear foot and angle of heel contact were measured using a three dimensional motion analysis system. In the second peak, the angle of heel contact showed statistically significant difference between safety shoes and insole, however, there was no statistical significance among three different safety shoes. The angle of ankle increased significantly at initial contact, first peak, the second peak and the toe off phase compared with type 1 and 2 safety shoes, and the angle of ankle showed statistically significant difference between with and without applying the insole. During the first peak, the second peak and the toe off phase, the angle of knee was statistical significance between safety shoes and insole. In heel contact, the angles of Achilles' tendon showed statistically significant difference between safety shoes and insole. The rear foot angles showed statistically significant difference between safety shoes and insole during heel contact and early heel contact. These results suggest that the type 1 safety shoes were superior to others in the statistics, and applying insole could be a possible method to prevent fatigue of lower extremity and musculoskeletal disorders. Further studies are needed to find the effect of ergonomically designed safety shoes and insole on practical value in prevention of musculoskeletal disorder, fatigue and satisfaction of workers.
Mariner's Information Processing Characteristics in Ship-to-Ship Collision Situation
Kim, Bi-A ; Oh, Jin-Seok ; Lee, Se-Won ; Lee, Jae-Sik ;
Journal of the Korean Society of Safety , volume 23, issue 1, 2008, Pages 46~50
The purpose of the present study was to investigate the mariner's information characteristics in ship-ta-ship collision situation using the full mission ship-handling simulator. Risk levels of ship-to-ship collision were manipulated by whether the target ship complies with the naval regulations and by movement patterns of target ship. Dependent variables reflecting mariner's information characteristics in ship-ta-ship collision situation were measured in terms of radar detection reaction time, free recall performance of past navigation situation, and subjective ratings for the task difficulty. The results showed that, in general, the mariners appeared to be deteriorated in their radar detection reaction time and free recall performance as the risk of ship-ta-ship collision increased. Also, the mariners tended to rate required tasks more difficult in the high risk ship-ta-ship collision situation.
Performance and Preference for Handle Angles of Pliers
Kee, Do-Hyung ;
Journal of the Korean Society of Safety , volume 23, issue 1, 2008, Pages 51~56
This study aims to investigate the effect of handle angles of pliers on performances of task completion time and the number of errors, and subjective ratings of preference. For doing this, an experiment was conducted, where 14 subjects of 11 college-age male and three female students participated. In the experiment, plier handles angled at
were used as independent variable, and the task completion time and the number of errors, and subjective ratings of preference as dependent variables. The subjects were instructed to do two tasks of bending an iron plate by
and cutting wires. The results revealed that while the performances of task completion time and the number of errors were not statistically different depending upon the handle angles of pliers, the subjective ratings of preference were significantly different. Based on the results, it is recommended that the pliers with handles bent by
be used in real situations.
A Research on the Influence of Information Quality on Working Performance for Disaster Resource Management - Focusing on the Central and Local Government -
Min, Geum-Young ; Jeong, Duke-Hun ;
Journal of the Korean Society of Safety , volume 23, issue 1, 2008, Pages 57~65
The disaster damage can be reduced not only by quick response to its scene, but also by right resource allocation to the right places. The role of information quality on disaster resource has been considered to be an important factor for disaster management. The aim of this research is to investigate and explain the relationship between information quality and performance on disaster resource management. The information quality control for the disaster response operator is central to deliver right information to right people among different government levels such as local, state, and federal government.
Preparations and Antistatic/UV Blocking Properties of Dual Functional Phthalocyanine Materials
Kang, Young-Goo ; Ihm, Dae-Woo ; Kim, Shi-Surk ; Park, Byoung-Ki ;
Journal of the Korean Society of Safety , volume 23, issue 1, 2008, Pages 66~71
A new route to phthalocyanine complexes were developed to synthesize these products by fusion in the absence of solvent. This new method of synthesis without using solvent has advantages over the conventional synthetic methods since there are no risk of explosion and formation of harmful vapor from organic solvent. Reaction of PcFe with axial ligands such as
[Pc: Phthalocyanine, 4-VP: 4-Vinylpyridine] and
[VIM: 1-Vinylimidazole] afforded powderlike, pure dark greenish blue colored products. The resulted products are soluble in
and found to be complexes of the type
. Spectral properties were studied with ATR-FTIR and UV/Vis. Thermal and electrical characterization was also performed. Phthalocyanine complexes exhibit useful properties such as UV/Vis blocking, antistatic characteristics and excellent thermal stability and we anticipate various applicability in numerous products.