Fatigue failure analysis of high speed train gearbox housings

2017 ◽  
Vol 73 ◽  
pp. 57-71 ◽  
Author(s):  
Weigang Hu ◽  
Zhiming Liu ◽  
Dekun Liu ◽  
Xue Hai
Keyword(s):  
Failure Analysis ◽  
Fatigue Failure ◽  
High Speed ◽  
High Speed Train

The Fracture Failure Analysis of Precision Centrifuge Spindle

2014 ◽  
Vol 971-973 ◽  
pp. 802-805
Author(s):  
Wei Feng Zhang ◽  
Li Yan ◽  
Fu Xia Zhang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Chemical Composition ◽  
Fracture Mechanics ◽  
Failure Analysis ◽  
Fatigue Failure ◽  
High Speed ◽  
Experimental Results ◽  
Fracture Failure ◽  
Scanning Electron

For the problem of high-speed rotating centrifuge spindle fracture failures, relevant analyses are conducted from the perspective of microstructure, chemical composition and fracture mechanics by using scanning electron microscopy and related instruments. Experimental results and analyses indicate that the spindle fracture is fatigue failure, mainly caused by cold cracks generated on the journal surfacing. Based on the analysis results, improvements and measures are suggested to better solve the spindle weld fracture failure problems.

Failure Analysis of a Welded Aluminum Alloy Component in High-Speed Train

2011 ◽  
Vol 337 ◽  
pp. 670-673
Author(s):  
Yong Hui Zhu ◽  
Wei Zhou ◽  
Yuan Nie ◽  
Zhong Yin Zhu ◽  
Hui Chen ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Stress Concentration ◽  
Failure Analysis ◽  
High Speed ◽  
Propagation Speed ◽  
Element Distribution ◽  
High Speed Train ◽  
Alloy Component ◽  
Stress Concentration Region ◽  
Weld Toe

In this paper, a failure analysis is made to a welded aluminum alloy component of the equipment by module below the high-speed train. Making force analysis to the welded components by finite element, microscopic morphology observation and element distribution measurement of the fracture surface are done by the scanning electron microscopy and spectroscopy .It is determined that the main reason of fracture of welded components was that stress concentration exist in the working conditions, and the weld toe is the most severe stress concentration region. The stress concentration causes the fatigue microcrack, and under the action of repeated external force crack propagates and then crack. Lacking of penetration sites is under tensile residual stress, the crack propagation speed, and soon to instability and then broken.

Localized Fatigue Failure Analysis of Aluminium Crewboats due to Propeller Pulse Loads: A Case Study

2014 ◽  
Vol 891-892 ◽  
pp. 1041-1046
Author(s):  
Trevor M. Leacy ◽  
Roberto Ojeda
Keyword(s):  
Quality Control ◽  
Failure Analysis ◽  
Fatigue Failure ◽  
High Speed ◽  
Design Standards ◽  
Analysis Techniques ◽  
Construction Methods ◽  
Analysis Methods ◽  
Marine Industry

Marine grade alloys are extensively being used in high speed vessels such as patrol crafts, ferries and crew boats, where a reduction of the structural weight is critical to achieve higher speeds [1]. The use of aluminium has forced marine industry engineers to develop methods to design against fatigue failure. This has largely been addressed by the development of design standards, analysis techniques and the improvement of quality control and construction methods [2]. Nevertheless, even with these advancements there is a continued need for the development and improvement of aluminium analysis methods and guidelines [3].

Failure analysis of gearbox in CRH high-speed train

2019 ◽  
Vol 105 ◽  
pp. 110-126 ◽  
Author(s):  
Yongxu Hu ◽  
Jianhui Lin ◽  
Andy Chit Tan
Keyword(s):  
Failure Analysis ◽  
High Speed ◽  
High Speed Train
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