Fatigue crack growth analysis of drill pipes during rotary drilling operations by the multiple reference state weight function approach

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• 作者：Choja Ojanomare^a ; Pietro Cornetti^b ; Raffaele Romagnoli^a ; Cecilia Surace^b
• 关键词：FCG ; Fatigue Crack Growth ; MRS ; Multiple Reference States ; SIF ; Stress Intensity Factor ; S-N ; Stress-Number of Cycles to failure ; WF ; Weight Function
• 刊名：Engineering Failure Analysis
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：74
• 期：Complete
• 页码：11-34
• 全文大小：2354 K
• 卷排序：74

文摘

Development of a numerical model predicting drillpipe Fatigue-Life during drilling operations by considering a combination of tension and bending while undergoing rotation as loading condition. Obtaining SIFs along the crack front of a semi-elliptical internal crack in a drillpipe using MRS Weight Function and inserting the SIFs obtained in the Paris Model to evaluate the drillpipe fatigue life. Parametric study identifying the influence of load magnitudes, dogleg, crack shape and geometrical parameters on the fatigue life. Quantification of drillpipe fatigue life, in drilling service conditions.