吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (6): 1848-1853.doi: 10.13229/j.cnki.jdxbgxb201706024

• Orginal Article • Previous Articles     Next Articles

Analysis of fatigue life factors of aluminum alloy welded joints based on neighborhood rough set theory

WANG Chun-sheng1, 2, ZOU Li3, YANG Xin-hua2   

  1. 1.Engineering and Technology Center,CRRC Changchun Railway Vehicles Co., Ltd., Changchun 130062,China;
    2.School of Materials Science and Engineering,Dalian Jiaotong University,Dalian 116028,China;
    3.Software Institute,Dalian Jiaotong University,Dalian 116028,China
  • Received:2016-11-20 Online:2017-11-20 Published:2017-11-20

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Abstract: To sole the problem that classical rough set theory can only deal with continuous data, neighborhood rough set theory is employed to analyze the factors that influence the fatigue life of the welded joints. A unified neighborhood rough set model is proposed, which can handle both symbolic and numeric attributes. Attribute reduction algorithm combining forward greedy algorithm and backward pruning algorithm is used to obtain the key factors and to quantitatively calculate the weights of the factors influencing the fatigue life of the welded joints. Experiment results of aluminum alloy welded joints show that the proposed neighborhood rough set model can choose a small number of features and obtain an objective evaluation of various influence factors from the sample data of the aluminum alloy welded joints without any priori knowledge.

Key words: material synthesis and processing technology, neighborhood rough set, welded joints, fatigue life

CLC Number: 

  • TG409
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