超声表面滚压对管线钢裂纹尖端应力场的影响分析

王炳英; 尹宇; 高志伟; 王亚茹

超声表面滚压对管线钢裂纹尖端应力场的影响分析

中国石油大学(华东)机电工程学院, 青岛 266580

基金项目: 国家自然基金资助项目（51105383）；泰山学者建设工程资助项目（2015）；中国石油大学（华东）科研创新团队建设计划资助项目（15CX08006A）

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- 收稿日期: 2015-12-17

Effect of ultrasonic surface rolling processing on stress field at crack tip of pipeline steel

College of Mechanical and Electrical Engineering, China University of Petroleum, Qingdao 266580, China

摘要

摘要: 建立含裂纹缺陷四点弯和超声表面滚压加工的耦合三维有限元模型，使用有限元软件ABAQUS模拟了四点弯及超声表面滚压加工过程.分析了超声滚压加工前后四点弯试样三维静态裂纹的张开角度、位移、裂纹尖端应力场和J积分变化规律，讨论了超声表面滚压加工抑制裂纹扩展的机理.结果表明，超声滚压处理后，四点弯试样表层裂纹发生闭合，内部裂纹张开角度和位移明显小于未进行超声滚压处理的试样；USRP处理后裂纹尖端的拉应力降低，且距离超过裂纹尖端0.06 mm的应力由拉应力转变为压应力；USRP处理的位置处J积分数值显著减小，裂纹扩展倾向降低.
- 超声表面滚压加工 /
- 四点弯 /
- 裂纹 /
- 残余应力 /
- 有限元分析
Abstract: The three-dimensional finite element model of cracked four point bending and ultrasonic surface rolling was established, and the four-point bending and ultrasonic surface rolling process was simulated by ABAQUS. The three-dimensional static crack's opening angle, displacement, crack tip stress field and J integral of four point bending specimen were analyzed before and after the ultrasonic rolling process. The mechanism of crack growth inhibition by ultrasonic surface rolling process was also discussed.The results show that the surface crack of the four point bending specimen was closed after ultrasonic rolling treatment, and the opening angle and displacement of the internal crack were obviously smaller than those without the ultrasonic rolling treatment. The tensile stress of crack tip decreased after USRP treatment, and the stress after 0.06 mm from the crack tip changed from tensile stress to compressive stress. The value of J-integral significantly reduced at the location of USRP, and the tendency of crack propagation is reduced.
- ultrasonic surface rolling process /
- four point bending /
- crack /
- residual stress /
- finite element analysis

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参考文献(9)

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文章访问数: 548
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超声表面滚压对管线钢裂纹尖端应力场的影响分析

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Effect of ultrasonic surface rolling processing on stress field at crack tip of pipeline steel

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