The connection characteristics of Titanium alloy pipes in vibration environment

DOI

10.2991/icmia-16.2016.9How to use a DOI?

Keywords

the titanium alloy pipes, vibration environment, connection characteristics.

Abstract

In order to determine the fatigue limits of two kinds of titanium alloy pipes connected by welding and rolling, the vibration fatigue tests were carried out according to Aero-Criterion HB5277-84 which defines the test method and failure rule[1]. The test adopted the displacement of the pipes' free end measured by the laser-displacement-sensor as the controlling parameter and the first resonance frequency of specimen as the excited frequency. It can be seen in the test: the exciting force can't remain constant when the displacement of the pipe's free end is the same. Then the test was stopped and the first resonance frequency of the pipes was tested again, and it was found that the first resonance frequency has dropped, maybe more than 1%. However, the pipe in this case didn't lose its performance. It can be concluded that: 1) the failure rule defined in Aero-Criterion HB5277-84 was not suitable to some engine components with connection characteristic,2) As the connection technics (welded and rolled) quality is different, the connection stiffness is also different while the pipes' structure stays the same. So the process technics should be uniformed.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yixuan Li
AU  - Fulin He
PY  - 2016/11
DA  - 2016/11
TI  - The connection characteristics of Titanium alloy pipes in vibration environment
BT  - Proceedings of the 2016 5th International Conference on Measurement, Instrumentation and Automation (ICMIA 2016)
PB  - Atlantis Press
SP  - 43
EP  - 47
SN  - 1951-6851
UR  - https://doi.org/10.2991/icmia-16.2016.9
DO  - 10.2991/icmia-16.2016.9
ID  - Li2016/11
ER  -