The pipe for water supply is essential part among SOC (Social Overhead Capital) fields. Pipe for water supply is mainly damaged by deterioration of pipe, earthquake, ground sinking and so on. The leakage of water have been led to enormous economical loss in our country. The purpose of this study was to investigate the structural stability of flexible joint for relaxing impact due to earthquake and ground sinking. For this purpose, flexible joint was simulated using tensile load and internal pressure. As the results, flexible joint for structural stability was needed the tensile load of below 3 ton and internal pressure of below 60 kgf/cm2. However, it is considered that real flexible joint should be applied more high safety factor than that of simulation result because of combined stress.

ABSTRACT
1. 서 론
2. 모델링 및 수치해석 방법
3. 해석결과 및 고찰
    3.1 인장력 해석
    3.2 내압 해석
4. 결 론
References

• 서석진(Jni Co., Ltd.) | Seok-Jin Seo
• 양영준(Gyeongnam Nat'l, Univ. of Sci. & Tech., Automotive Eng.) | Young-Joon Yang Corresponding Author