• Water for future
• /
• v.40 no.5 s.166
• /
• pp.83-87
• /
• 2007

• Journal of Labour Economics
• /
• v.13
• /
• pp.1-20
• /
• 1990

• 한국도로학회지:도로
• /
• v.9 no.4
• /
• pp.78-87
• /
• 2007

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.18 no.6
• /
• pp.85-87
• /
• 2004

• The monthly packaging world
• /
• s.181
• /
• pp.82-87
• /
• 2008

• The Science & Technology
• /
• v.33 no.7 s.374
• /
• pp.85-87
• /
• 2000

• Korean Architects
• /
• no.4 s.229
• /
• pp.86-87
• /
• 1988

• TTA Journal
• /
• s.130
• /
• pp.87-92
• /
• 2010

• Journal of the Korean Society for Precision Engineering
• /
• v.23 no.12 s.189
• /
• pp.80-87
• /
• 2006

Seals are usually made from elastomer, a kind of rubber, and it has the non-linearity and hyper-elasticity. U-type seals are used to prevent the leakage of internal fluid sealed in hydraulic actuator because they have more excellent performance than O-rings or rectangular seals. As a core part of hydraulic actuator, U-type seal gives much effect on performance and reliability of actuator. This study considers an NBR U-type seal under high pressure of a hydraulic actuator, and provides its deformation, stress-strain characteristic and contact force using the non-linear finite element analysis. Analysis results are compared with the experimental ones performed by the self-developed testing equipment. Verification result shows that this study presents a good application process for the effective design of U-type seals under high operation pressure.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• v.2
• /
• pp.87-89
• /
• 2006

U-물류/유통, U-항만에 핵심적인 기술이 될 Ultra-Wide(UWB)통신을 위한 광대역 안테나를 설계, 개발하였다. 설계된 안테나는 UWB 주파수 대역인 3.1$^{\sim}$11.7GHz 대역에서 안테나 특성을 만족하고, IEEE 802-11a와HIPERLAN/2에 의해 사용이 제한된 5.15${\sim}$5.825GHz 대역에서 주파수 저지 대역을 가지기 위하여 U모양의 얇은 슬롯을 복사 패치 위에 구현 하였다. 제작한 안테나는 5${\sim}$595GHz 대역을 제외하고는 안테나의 특성을 만족한다.