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댐 시설물 수중 구조체 보수를 위한 수중불분리성콘크리트의 평가
윤이나(Yoon, Yi-Na),강희병(Kang, Hee-Byoung),김준모(Kim, Joon-Mo),김완영(Kim, Wan-Young),원종필(Won, Jong-Pil) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.2
The purpose of this study is to evaluate characteristics of antiwashout underwater concrete for repair of underwater dam facility. Laboratory experimentals were conducted by air content, slump flow, pH, turbidity and compressive strength for evaluation of antiwashout underwater concrete. Test results showed that A2 has good properties in all respects.
윤이나 ( Yoon Yi-na ),강희병 ( Kang Hee-byoung ),김준모 ( Kim Joon-mo ),김완영 ( Kim Wan-young ),원종필 ( Won Jong-pil ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.2
This study was performed to evaluate strength of underwater concrete patching materials. Laboratory experimentals were conducted by compressive strength and bond strength. Test results showed that patching materials were satisfied quality criterion of standard.
댐 시설물 수중 구조체 보수를 위한 수중불분리성콘크리트의 평가
윤이나 ( Yoon Yi-na ),강희병 ( Kang Hee-byoung ),김준모 ( Kim Joon-mo ),김완영 ( Kim Wan-young ),원종필 ( Won Jong-pil ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.2
The purpose of this study is to evaluate characteristics of antiwashout underwater concrete for repair of underwater dam facility. Laboratory experimentals were conducted by air content, slump flow, pH, turbidity and compressive strength for evaluation of antiwashout underwater concrete. Test results showed that A2 has good properties in all respects.
윤이나 ( Yoon Yi-na ),강희병 ( Kang Hee-byoung ),김준모 ( Kim Joon-mo ),김완영 ( Kim Wan-young ),원종필 ( Won Jong-pil ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.2
This study was performed to evaluate durability of underwater dam concrete patching materials. Laboratory experimentals were conducted by bond strength, abrasion resistance, chloride ion penetration. Test results showed that patching materials were relatively good performance except chloride ion penetration.
윤이나(Yoon, Yi-Na),강희병(Kang, Hee-Byoung),김준모(Kim, Joon-Mo),김완영(Kim, Wan-Young),원종필(Won, Jong-Pil) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.2
This study was performed to evaluate durability of underwater dam concrete patching materials. Laboratory experimentals were conducted by bond strength, abrasion resistance, chloride ion penetration. Test results showed that patching materials were relatively good performance except chloride ion penetration.
윤이나(Yoon, Yi-Na),강희병(Kang, Hee-Byoung),김준모(Kim, Joon-Mo),김완영(Kim, Wan-Young),원종필(Won, Jong-Pil) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.2
This study was performed to evaluate strength of underwater concrete patching materials. Laboratory experimentals were conducted by compressive strength and bond strength. Test results showed that patching materials were satisfied quality criterion of standard.
전단농화유체가 함침된 아라미드 직물의 물리적 특성에 관한 연구
권남희,윤이나,정원영,임대영,유의상,김주혜,Kwon, Nam-Hee,Yoon, Yi-Na,Jeong, Won-Young,Lim, Dae-Young,Yoo, Eui-Sang,Kim, Ju-Hea 한국섬유공학회 2012 한국섬유공학회지 Vol.49 No.2
Fabric construction affects the friction between yarns, which is a very important parameter on energy absorption and propagation. This study reports the physical properties dependent on the weaving density and STF (shear thickening fluid) impregnated aramid fabrics. To improve the frictional force between yarns, STF was applied on Kevlar woven fabrics. STF/Kevlar composite was composed of Kevlar woven fabrics impregnated with fumed silica dispersed in poly-ethylene glycol. The results demonstrated that the yarn pull-out force of neat Kevlar fabrics increased linearly as the fabric count increased. In the case regarding STF impregnated Kevlar fabrics, the pull-out force increased exponentially as the fabric count increased. Considering the ballistic performance of the fabric is related to the pull-out force of yarns in the fabric, the STF/Kevlar composite with high density woven fabrics can be a decent material for bullet-proof equipment.
정원영,윤이나,박준호,김주혜,임대영,유의상,Jeong, Won-Young,Yoon, Yi-Na,Park, Jun-Ho,Kim, Ju-Hea,Lim, Dae-Young,Yoo, Eui-Sang 한국섬유공학회 2011 한국섬유공학회지 Vol.48 No.4
Multi-layered woven fabrics are widely used in soft body armor to provide ballistic resistance. In this study, we suggest a method to increase the energy absorption by narrow fabric effect. Five kinds of ballistic panel were prepared by cutting, slitting, and so on. The width of the strips was determined based on the size of the induced trauma (back face signature on oil clay); they were stacked at either bias or warp directions. The ballistic performance (NIJ Standard-0101.04, Type IIIA) of narrow fabrics was compared to that of wide fabric panels. Lab-scale dropping projectile and NIJ Standard tests showed that the penetration depth of the trauma was less in narrow fabrics than in wide plain fabrics. The width of the trauma was also considerably smaller than the control. It is caused by free edge effect of relatively narrow strips of woven fabrics.