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Open AccessArticle

Fatigue Behavior of a Box-Type Welded Structure of Hydraulic Support Used in Coal Mine

by Xiaohui Zhao 1,2, Fuyong Li 2, Yu Liu 3,* and Yanjun Fan 1
1
Key Laboratory of Automobile Materials, School of Materials Science and Engineering, Jilin University, Changchun 130025, China
2
Zhengzhou Coal Mining Machinery Group Company Limited, Zhengzhou 450016, China
3
School of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
*
Author to whom correspondence should be addressed.
Academic Editor: Daolun Chen
Materials 2015, 8(10), 6609-6622; https://doi.org/10.3390/ma8105325
Received: 7 July 2015 / Revised: 7 September 2015 / Accepted: 8 September 2015 / Published: 24 September 2015
(This article belongs to the Section Structure Analysis and Characterization)
Hydraulic support is the main supporting equipment of the coal mining systems, and they are usually subjected to fatigue failure under the high dynamic load. The fracture positions are generally at welded joints where there is a serious stress concentration. In order to investigate and further improve the fatigue strength of hydraulic support, the present work first located the possible position where fatigue failure occurs through finite element analysis, and then fatigue tests were carried out on the different forms of welded joints for the dangerous parts. Finally, Fatigue strength-life (S-N) curves and fracture mechanism were studied. This research will provide a theoretical reference for the fatigue design of welded structures for hydraulic support. View Full-Text
Keywords: hydraulic support; finite element; stress concentration; weld; fatigue hydraulic support; finite element; stress concentration; weld; fatigue
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Zhao, X.; Li, F.; Liu, Y.; Fan, Y. Fatigue Behavior of a Box-Type Welded Structure of Hydraulic Support Used in Coal Mine. Materials 2015, 8, 6609-6622.

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