자동차 유압브레이크용 고무호스의 내구성 시험 및 미세손상에 관한 연구Durability Test and Micro-Damage Formation of Rubber Hose for Automotive Hydraulic Brake
- Other Titles
- Durability Test and Micro-Damage Formation of Rubber Hose for Automotive Hydraulic Brake
- Authors
- 곽승범; 최낙삼; 임영한
- Issue Date
- Feb-2008
- Publisher
- 한국복합재료학회
- Keywords
- 유압브레이크 호스(Hydraulic brake hose); 열하중(Thermal-load); 층간분리(Interfacial delamination); 주사형 전자현미경(SEM : scanning electron microscope); 광학현미경(Optical microscope)
- Citation
- Composites Research, v.21, no.1, pp.40 - 45
- Indexed
- KCI
- Journal Title
- Composites Research
- Volume
- 21
- Number
- 1
- Start Page
- 40
- End Page
- 45
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/42992
- ISSN
- 2288-2103
- Abstract
- Rubber hose assembly for automotive hydraulic brake during operation is subject to combined stresses of
cyclic pressure, cyclic bending and torsion as well as thermal load. The rubber hose is composed of
ethylene-propylene diene monomer(EPDM) rubber layers reinforced by polyvinyl acetate(PVA) braided fabrics. A
durability tester with loading rigs for inducing the above cyclic stresses was used to investigate failure
mechanisms in the rubber hose assembly. Failure examination was performed at every 100 thousands cycles of
bending and torsion. Hose samples were sectioned with a diamond-wheel cutter and then polished. The polished
surface was observed by optical microscope and scanning electron microscope (SEM). Some interfacial
delamination with a length of about 1mm along the interface between EPDM rubber and PVA fabrics was
shown at the test cycles of 400,000. The delamination induced some cracking into the outer rubber skin layer
to leading the final rupture of the hose.
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