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Proceedings Paper

Evaluation of oil-leakage of multi-layered resin-hose clamped with metal nipple and sleeve
Author(s): Kenta Matsuoka; Kazuya Okubo; Toru Fujii; Chihiro Nakamura; Yushi Fujishita; Fuko Kusu; Masato Matsushita; Ryota Yoshihara
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Paper Abstract

The purpose of this study is to investigate the path of occurred oil-leakage of multi-layered resin-hose as one of multifunctional materials around the caulked joint with a metal nipple and sleeve when excessive cyclic internal pressure was applied onto the hose. Equivalent cyclic axial tensile force was substitutively applied to the hose, where same degree of normal stress was produced in longitudinal direction. Excessive 3 and 5 times of the standard load was applied to the hose. Cyclic loading was paused at every 1000 and 10000 cycles and then designed internal pressure was applied to the hose by a hand-operated pump with water in order to check whether the leakage was occurred around the joint and surface of the hose for safety evaluation. Cyclic fatigue life was defined as the number of loading cycles in which the leakage and the initial damage which was the passage of the ultrasonic wave was observed on the cyclic test. Test results showed the fatigue life at which leakage of water was observed was increased 20 times in case of K=3 compared to that in case of K=5. The cycles of initial damage detected by the ultrasonic wave were passed was increased 3.3 times in case of K=3 compared to that in case of K=5. The fluorescent agent penetrated from the core layer of resin hose to the reinforcement layer in which a half cross section along longitudinal direction in failed specimens was observed after the leak test. The original specimens had the gap between the resin-hose and the nipple and then the gap extended and connected during fatigue cyclic. In this study, it was observed that oil was leaked through narrow gap between the nipple and core layer of resin hose.

Paper Details

Date Published: 22 March 2018
PDF: 8 pages
Proc. SPIE 10596, Behavior and Mechanics of Multifunctional Materials and Composites XII, 105961U (22 March 2018); doi: 10.1117/12.2286239
Show Author Affiliations
Kenta Matsuoka, Doshisha Univ. (Japan)
Kazuya Okubo, Doshisha Univ. (Japan)
Toru Fujii, Doshisha Univ. (Japan)
Chihiro Nakamura, Nitta Corp. (Japan)
Yushi Fujishita, Nitta Corp. (Japan)
Fuko Kusu, Nitta Corp. (Japan)
Masato Matsushita, Nitta Corp. (Japan)
Ryota Yoshihara, Nitta Corp. (Japan)


Published in SPIE Proceedings Vol. 10596:
Behavior and Mechanics of Multifunctional Materials and Composites XII
Hani E. Naguib, Editor(s)

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