Fatigue crack growth in the contact wire of railway catenary

摘要：

　　In this paper,we used the eXtended Finite Element Method (XFEM),implemented in the software CAST3M developed by Commissariat à lEnergie Atomique (CEA),to simulate the fatigue crack growth of the contact wire in the railway catenary.The material characteristics and parameters of the Paris law were identified thanks to experimental tests performed in a laboratory of Société Nationale des Chemins de Fer Fran?ais (SNCF).Specimens were cut directly from the contact wire.Two mean-stress levels were considered.The stress intensity factors were calculated by Finite Elements Method.In order to validate the model and check its robustness,we performed a parametric analysis with different crack geometries.The numerical results showed a good agreement with the experimental observations in terms of the evolution of the crack shape and its growth rate.These results show that this numerical strategy is relevant and efficient to predict the critical size and the residual lifetime of the fatigue cracks detected by maintenance operations (Ultrasonic monitoring).

关键词： fatigue crack growth numerical simulation eXtended Finite Element Method (XFEM) railway catenary

作者: Si Hai Mai Mac Lan Nguyen-Tajan Arnaud Verrier Josselin Banting Stéphane Avronsart

作者单位: Innovation &Research,Société Nationale des Chemins de Fer Fran(c)ais (SNCF),75611 Paris,France Agence dEssai Ferroviaire,SNCF,94407 Vitry Sur Seine,France Direction de lIngénierie,SNCF,93574 La Plaine Saint Denis,France

会议类型: 国际会议

会议名称: 第13届国际断裂大会(ICF2013)

会议地点: 北京

会议语种:英文

页码: 1-8

在线出版日期: 2013-06-16（万方平台首次上网日期，不代表论文的发表时间）