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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 6, Issue 4 - Dec 1991
Volume 6, Issue 3 - Sep 1991
Volume 6, Issue 2 - Jun 1991
Volume 6, Issue 1 - Mar 1991
Selecting the target year
NO Removal Reactoin by Cu/zeolite
Journal of the Korean Society of Safety , volume 6, issue 3, 1991, Pages 5~11
To remove NO from flue gas, a direct decomposition method to
was investigated by using copper / zeolite catalyst. The copper ion-exchanged HY type zeolite has high activity on NO decomposition. The decomposition activity was increased with the increase of ion-exchange level, contacting time and reaction temperature in the range of 30
, and decreased with the oxygen addition.
Dielectric Properties of Unsaturated Polyester Resin for Electric Safety
Journal of the Korean Society of Safety , volume 6, issue 3, 1991, Pages 12~20
The dielectric properties that effect to electric safety for unsaturated Pelvester resin were studied over the temperature range of 30-40［
］ and the frequency range of 110~3
［Hz］. According to the results of the study, it has been observed that two kinds of dielectric losses in electric safety were existed by the molecular movement of C-H and OH group. When the ,adio of hardener was 1.5［%］, the characteristics of specimens were excellent in view of the electrical materical. In the range of measuring frequency the dielectric constants and the dielectric losses were 3.5~5.5 and 10
respectly. The activation energy of loss spectrum in aspect of electric safety and the entropy appeared at the 30［
］ were 33.4［Kacl/mole］ and 54.9［cal/mole.deg］ respectly.
A Study on tho Effcct of Strcss Ratio on Fatigue Crack Growth Behavior
Journal of the Korean Society of Safety , volume 6, issue 3, 1991, Pages 21~26
In this study, a crack closure behavior of Al-alloy 5052-H38 was investigated. The fatigue test was performed by the four-point bending test under the contast amplitude load. Stress ratio R was changed from-1.0 to 0.5. To mcasure the fatigue crack opening point, the graph of load vs. subtracted displacement by computer program was obtained from the X - Y plotter. In order to gain the displacement data, a strain gage was attached at the back surface against the notched side. Uslng the conception of crack closure and influence of on crack growth rate a model for crack growth rate is developed for Al-alloy 5052-H38.
Oxidation and mechanical relaxation properties of chlorinated LDPE film
Journal of the Korean Society of Safety , volume 6, issue 3, 1991, Pages 27~34
This paper is for the properties of the oxidation-proof of the partially discharged and of the molecular motion on chlorinated PE Film. this paper also shows the properties of the molecular motion of the
ray irradiated PE Film. 1 In the surface of the PE Film enforce chlorination, C-Cl be distributed up to 10
m deep. 2. In according to the development of the chlorination, the measure of crystalization decreased and cross link occured. 3. Chlorination PE Film control the oxidation on ozone to occuratlon by partial discharge and it lost bonding chlorine. 4. in according to chlorination,
absorption in motion of CH2 main chain of PE drcreased by chlorine stbstitution.
Shear Behavior of Steel Eccentric Link Subject to Seismic Loads
Journal of the Korean Society of Safety , volume 6, issue 3, 1991, Pages 35~39
Concentrically braced frames are limited in their ability to absorb energy during an earthquake However by placing the bracing members eccentric to the beam column joints, an energy absorbing link unit is produced. The energy is absorbed by the link and / or columns deforming inelastically. Three models of a multistorey structure were analyzed using DRAIN-2D computer program .Three link lengths were used in the analyses, 7, 11 and 15 inches. The yield patterns are produced. However it is interesting to note the relative valuses of force and moment obtained.
Numerical Analysis of Heat and Mass Transfet in the Absorbent By Surfactant Addition
;;Heo Boo, Back Mok;
Journal of the Korean Society of Safety , volume 6, issue 3, 1991, Pages 40~49
To better understand the phenomena inside an absorber, where heat and mass transfer coexist, this study selected the most baslc absorption model from in whifh water vapor is absorbed on the surface of a stationary lithium bromide absurbent solution. The purpose of this study is to obtain basic knowledge of heat and mass transfer processes as affected by Marangoni convection induced by addition of surfactant. We apply a non-flowing bulk absorption model and assume that dropwise surfactant is fixed on the absorbent surface. Four governing equation-continuity, laminar monentum, energy and diffusion are solved numerically to obtain temperature and concentraion distributions during steam absorption with Marangonl convection.. In conclusion, Sh and Nu genrally increase at the initial absorption stage.
A Study on the characteristics of crack propagation in stainless steel wellding zone by AE Method
Journal of the Korean Society of Safety , volume 6, issue 3, 1991, Pages 50~55
It is well known that mechanisms of fracture and crack growth depend upon material characteristics such as fracture toughness, environmental condition, cracd geometry and mechanical properties. It seems to be very important to investihate the effects of the above factors on the behavior of structural components which contain flaws for the detailed evaluation of their intehrity. In this experimental research, fracture behaviors of moterials were investigated by using Acoustic Emission(AE) technique. The fracturing processes of materials were estimated through both the tension specimens. For the detrmlnatlon of yied strength or fracture toughness, the critical applied load at the crack initiation and propagation is thought to be very important. The critical applied load(PQ) was determined through AE signal. The source of AE signal was estimated by fractography analysis. These experimental results may contribute to the safety analyses and the evaluation of strength of structures.
A Study on Reliability Based Design Criteria for Erection Members
Journal of the Korean Society of Safety , volume 6, issue 3, 1991, Pages 56~63
This study investigates reliability based design criteria for the erection members, and proposes practical algorithm which is based on Ellingwood's algorithm for the reliability analysis and the derivation of reliability based criteria. The magnitude of the uncertainties associated with load effects are chosen primarily by considering our level of practice. And thus the uncertainties so obtained are applied for the reliability analysis and the derivation of reliability based design criteria. A target reliability(
=2.0) is selected as an appropriate value by analyzing the reliability levels of our current USD and WSD design standards. Them a set of load and resistance factors corresponding to the target reliability is proposed as a reliability based design provision, and furthermore a set of allowable stresses for steel having same level of reliability with the corresponding LRFD criteria is also prepared for the current WSD design provision. It may be concluded that the proposed LRFD reliability based design provisions and the corresponding allowable stresses give more rational design than the current code for erection membars.s.s.