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써멀마네킨을 이용한 군용 방한복의 보온성 평가에 관한 연구
진용범,김성민,한현정,사아나,박창규,Jin, Yong Bum,Kim, Sungmin,Han, Hyun Jung,Sa, A Na,Park, Chang Kyu 한국섬유공학회 2018 한국섬유공학회지 Vol.55 No.1
This paper proposes a novel test method for the evaluation of thermal insulation capability of military cold-weather clothing. A new evaluation method for thermal insulation using a thermal manikin was developed, and the thermal insulation capabilities of various materials were tested using the proposed method. The experiment was conducted under environmental conditions similar to that of actual military operations. The thermal insulation capability and specific mass were evaluated for 31 innerwear and 9 outerwear items. The criteria for selecting the optimal winter clothing was proposed through the statistical analysis of the results of the experiments.
진용범(Jin Yong-Bum),변성원(Byun Sung-Won),전한용(Jeon Han-Yong) 한국토목섬유학회 2006 한국지반신소재학회 논문집 Vol.5 No.4
다짐조건을 달리하여 3가지 종류 지오그리드의 내시공성을 측정하였다. 이 실험은 ENV ISO 10722-1에 근거하여 실행되었다. 채움재와 관계없이 다짐횟수가 증가할수록 지오그리드의 인장강도는 감소하였으며, 지오그리드 종류에 따라 감소되는 경향이 다르게 나타남을 알 수 있었다. Woven 및 warp-knitted type 지오그리드의 경우 접합형 지오그리드에 비해 더 큰 감소경향을 나타내었다. Installation damage of 3 types of geogrids were evaluated with compaction condition. This experimental test was in accordance with ENV ISO 10722 1. Tensile strength of geogrids were decreased with number of cyclic compaction loading without ? regard to kind of filled material and it was seen that strength decrease tendency showed the dependence on geogrid type. Woven and warp-knitted type geogrids showed the bigger decrease of tensile strength than welded type geogrids.
Geosynthetics 시공 시 손상평가에 대한 고찰
전한용,진용범,장연수 한국토목섬유학회 2006 한국토목섬유학회 학술발표회 Vol.2006 No.12
New considerable test method was suggested through reviewing the current installation damage tests of ISO and ASTM International etc.. For index test, more detailed conditions were interpreted to specify and regulate the installation damage of geosynthetics. The detailed conditions of field installation, properties of filled soils, variables of performance decrease were reviewed from the quantitative analysis.
전한용,진용범,장연수,유충식 한국지반공학회 2007 한국지반공학회논문집 Vol.23 No.7
Installation damage of 3 types of geogrids was evaluated with compaction condition by laboratory tester. This experimental was in accordance with ENV ISO 10722-1. First, soil distribution and water content were conducted. And then we changed cyclic loading time and type of geogrids as a factor of installation damage. The samples are woven, warp-knitted, welded type of 6, 8, 10T. This study aims to give an insight into the relationships between installation damage and cyclic loading time. The result of studies was that strength of the damaged geogrids can be closely correlated with the time of loading cycles. Especially, welded type shows slower slope than two types of geogrids due to coating materials. That means welded type is coated with PP (Polypropylene), but the other two types of geogrids are coated with PVC (Polyvinyl Chloride). To confirm another factor different method was performed. The size of soil was used between 9.5 mm and 23.5 mm to compare initial experimental. Cyclic loading compaction is taken 200 times before installation test and the reason is that the reduction factor of this case by installation damage was higher than other compaction loading conditions.
전한용,변성원,김형섭,진용범,Jin Yuanchun 한국토목섬유학회 2006 한국토목섬유학회 학술발표회 Vol.2006 No.4
In this study, the surface modification method was used to improve the performance of PVA nonwoven geotextiles and the friction test was done at a interface of geomembranes and nonwoven geotextiles which use to the liner and cover systems of the representative waste landfill in order to estimate of the frictional properties. In case of a hydrophilic treatment was chosen mixture of gases of O₂(80%)+CH₄(20%), and the electric power, the plasma treated time, and the gas flow rate were 100, 200, and 300 watt. 1, 5. and 10 min, and 200 and 400 sccm, respectively. In case of hydrophobic treatment was used gas of C₂F?, and the electric power, the plasma treated time, and the gas flow rate were 100. 200, and 300 watt, 1, 5, and 10 min, and 40 and 60 sccm, respectively. The frictional performance was evaluated as peak and frictional angles with plasma treatment conditions.