Research on 3-D Simulation of Remote Field Eddy Current Detection for Stress Corrosion Cracks in Pipeline

详细信息    查看全文 | 下载全文 | 推荐本文 |

• 作者：WU De-Hui
• 会议时间：2011-11-11
• 关键词：应力腐蚀开裂 ; RFEC信号 ; 远程现场探测器 ; 3-Dfinite模型 ; 涡流检测
• 作者单位：Department of Electronic Mechanical Engineering, Xiamen University, Fujian Xiamen, 361005, China
• 母体文献：全球华人无损检测高峰论坛论文集
• 会议名称：全球华人无损检测高峰论坛
• 会议地点：厦门
• 主办单位：中国机械工程学会
• 语种：chi

摘要

Three-dimensional (3-D) numeric simulations, based on the finite element model, are conducted to simulate the inservice inspection of the axial cracks typical of stress corrosion cracking (SCC)in ferromagnetic pipeline using remote field eddy current (RFEC) probes. A typical remote field probe internal to and coaxial with the pipe is firstly introduced. Then the electromagnetic induction phenomena associated with RFEC are deduced from the quasi-static form of Maxwell equations. Subsequently a 3-Dfinite element simulation model to analysis the detection of RFEC technology is established in ANSYS, and the two-step process method is proposed for reducing the calculation. Finally the RFEC signals are observed when changing the shape of SCC (such as length, depth and width), and the definite influences of crack size on the amplitude and phase lag of REFC signals are evaluated. The results of the investigations are beneficial to the detection and sizing of SCC in pipelines.