Evaluation of oil-leakage of multi-layered resin-hose clamped with metal nipple and sleeve
Evaluation of oil-leakage of multi-layered resin-hose clamped with metal nipple and sleeve
复制标题
金属接头和套管夹紧的多层树脂软管漏油评价
DOI：
10.1117/12.2286239
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Kenta Matsuoka; Kazuya Okubo; Toru Fujii; Chihiro Nakamura; Yushi Fujishita; Fuko Kusu; Masato Matsushita; Ryota Yoshihara
中科院分区：
文献类型：
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作者：
Daiki Shiozawa;Yuto Ogino;Takaya Washio;Takahide Sakagami;Hideki Ueda;Taizo Makino;Kenta Matsuoka; Kazuya Okubo; Toru Fujii; Chihiro Nakamura; Yushi Fujishita; Fuko Kusu; Masato Matsushita; Ryota Yoshihara
摘要本研究的目的是探讨多层树脂胶管作为多功能材料之一，在过度的循环内压作用下，其金属接头与套筒密封接头周围发生漏油的路径。将等效的循环轴向拉力替代施加到软管上，在纵向上产生相同程度的正应力。软管的负荷超过标准负荷的3倍和5倍。每1000次和10000次循环暂停循环加载，然后用手动泵加水对软管施加设计内压，检查软管接头周围和表面是否发生泄漏，进行安全性评估。循环疲劳寿命定义为在循环试验中观察到泄漏和超声波通过时的初始损伤的加载循环次数。试验结果表明，当K=3时，观察到漏水的疲劳寿命比K=5时提高了20倍。K=3时超声波检测的初始损伤周期比K=5时增加了3.3倍。泄漏试验后，荧光剂从树脂软管芯层渗透到加固层，在失效试样中观察到加固层沿纵向的半截面。原始试件在疲劳循环过程中，树脂软管与接头之间存在间隙，间隙扩展并连接。在本研究中，我们观察到油是通过乳头与树脂软管核心层之间的狭窄间隙泄漏的。
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.