# 필라멘트 와인딩 공정에 의한 천연가스 차량용 복합재료 압력용기

• 김병선 (한국기계연구원 공정연구부 복합재료그룹) ;
• 김병하 (한국기계연구원 공정연구부 복합재료그룹) ;
• 김진봉 (한국기계연구원 공정연구부 복합재료그룹)
• Published : 2004.10.01

#### Abstract

Composite pressure vessels with HDPE (high density polyethlyne) liner with metal boss at each end were developed by Filament Winding Process. The vessel is composed of a dome-shaped part at each end and a cylinder-shaped part at the middle of the vessel. The environmental tests carried out for possible vessel materials such as High Density Polyethlyn (HDPE), resins and reinforcing fibers up to a year showed no significant damages. The boss was designed to minimize the gas leak which was verified by FEM analysis. Most ideal fiber tension was obtained by experimental method and the fiber volume fraction, $\textrm{V}_{f}$, obtained by image analyzer were 55.4 % in cylinder and 55.6 % in dome parts, respectively. Winding pattern is programmed to control the composite thickness in the dome areas such that the failure of the vessel may occur in the cylinder. During the cure, the vessel was rotated and a constant internal pressure of 0.62 bar was applied. From this, the vessel's burst pressure is improved by 28 %. The burst and fatigue tests for under-wound and fully wound vessel showed satisfactory results.

#### References

1. ICCM-II, Int'l Conf. on Composite Materials Developing of Composite CNG Pressure Vessels B. S. Kim(et al.)
2. KIMM Report, BSM 231-1609.C. Development of Technology on High-precision Filament Winding Technology E. J. Jun(et al.)
3. KIMM Report, BSN160-1244.C. Development of FRP Pressure Vessel(I,II) E. J. Jun(et al.)