Fatigue life evaluation of friction stir welding joints based on nonlinear ultrasonic inspection
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摘要: 焊接接头疲劳寿命的分析与估算一直是轨道交通车辆设计与制造过程中的难点,现有估算方法一般基于有限元仿真进行计算,估算结果往往得不到有效验证。提出了一种疲劳寿命的超声检测与评价方法,对不同疲劳阶段的焊接试件进行了非线性超声检测,提取了等效非线性系数用于评价疲劳损伤的累积程度,根据该参数与疲劳寿命的相关关系构建了基础数据库,并据此基于贝叶斯定理评价了搅拌摩擦焊接头的疲劳寿命。该方法具有低成本、高可靠性等优点,可望推动疲劳寿命评价方法的技术发展。Abstract: The analysis and estimation for fatigue life of welds have always been difficult in the design and manufacture of rail transit vehicles. The existing estimation methods are generally based on finite element simulation, whose results are often not validated effectively. An ultrasonic inspection and evaluation method for fatigue life estimation was proposed. Nonlinear ultrasonic inspection was performed on the specimens with welds in different fatigue stages. An equivalent nonlinear coefficient was proposed to evaluate the fatigue damage, and the relationship between this parameter and the fatigue life was utilized to construct a database. The fatigue life of the friction stir welding joints was evaluated based on this database according to the Bayesian Theorem. This method has the advantages of low cost and high reliability, and is expected to help promote the technical innovation of fatigue life evaluation methods.
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[1] 常树民,马纪军.铝合金车体结构设计构思[J].铁道车辆,2004,42(9):9-13,45. [2] 王庆峰.6005A-T6铝合金地铁车体的搅拌摩擦焊[D].杭州:浙江工业大学,2015. [3] 王乐欣.地铁铝合金车体的强度仿真及疲劳寿命评估[D].大连:大连交通大学,2020. [4] 钱凯杰.A型地铁铝合金车体疲劳寿命分析与评估[D]. 南京:南京理工大学,2020. [5] MARCANTONIO V,MONARCA D,COLANTONI A,et al.Ultrasonic waves for materials evaluation in fatigue,thermal and corrosion damage:a review[J].Mechanical Systems and Signal Processing,2019,120:32-42.
[6] 赵立彬.铝合金焊接接头疲劳损伤的非线性超声检测研究[D].哈尔滨:哈尔滨工业大学,2012. [7] 高立,陈振华,李承庚,等.铝合金板材疲劳损伤的非线性导波检测[J].无损检测,2020,42(7):61-65. [8] 李海洋,潘强华,王召巴.金属表面疲劳损伤的非线性Rayleigh波检测方法[J].无损检测,2018,40(8):34-38. [9] 张发友.基于非线性超声的材料损伤检测研究[D].郑州:郑州大学,2019. [10] 周海鹏,韩赞东,都东,等.基于Gauss调制脉冲模型的超声信号提取算法[J].清华大学学报(自然科学版),2019,59(2):96-102. [11] 汪周盼.基于朴素贝叶斯分类器的轨道交通客流分布模型研究[D].广州:华南理工大学,2018. [12] 张如艳.基于核函数的最大后验概率的分类方法的研究及其应用[D].无锡:江南大学,2012.
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