|Table of Contents|

Prediction and experiment on fatigue life of metal bellows in bellows propellant tank(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2022年03期
Page:
71-78
Research Field:
测控与试验
Publishing date:

Info

Title:
Prediction and experiment on fatigue life of metal bellows in bellows propellant tank
Author(s):
FAN Kai1; 2; QIAO Yanwei1; 2; WANG Tingting1; 2; ZHAO Heming1; 2; LU Siyuan1; 2
(1.Shanghai Institute of Space Propulsion, Shanghai 201112, China 2.Shanghai Engineering Center of Space Engine, Shanghai 201112, China)
Keywords:
fatigue life prediction metal bellows bellows propellant tank
PACS:
V415.5
DOI:
-
Abstract:
The bellows propellant tank is the most widely used and mature tank type in the propellant refueling system of space vehicle.The metal bellows is stretched and compressed repeatedly during the tank work process, and its fatigue life is directly related to the reliability of the system.Therefore, it is urgent to accurately predict the fatigue life of the metal bellows.Firstly, three types of equivalent life models(Goodman model, Gerber model and Soderberg model)were used to modify the stress-fatigue life curve, and the generalized stress-fatigue life curved surface of SUS304 stainless steel was obtained based on the fatigue performance test data.Then, the fatigue life of the metal bellows under the full-stroke working condition was predicted and verified by the fatigue test.Finally, according to the specific temperature alternating compensation requirements of the metal diaphragm tank,the fatigue life of metal bellows under small stroke was analyzed.The results show that the generalized stress-fatigue life curved surface based on the revision of the equivalent life model provides a slightly conservative result for the fatigue life of metal bellows, and the corner of the inner wave peak, as the weak position, should be considered in the design and manufacturing process of metal bellows.

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