The Experimental Study on Residual Stress Change by Ultrasonic Comparing Testing of Plastic Deformation of Metals
摘 要
采用超声检测方法,通过声弹性理论可计算出残余应力的数值。但是由于实际声速很难准确测量,使得该方法在实践中的可操作性受到了限制。介绍了声速和残余应力间关系,用对比实验的方法来分析声速变化和残余应力变化之间的关系。实验表明,试件受拉伸至塑性变形,内部所受残余拉应力增大,同一试件的同一位置超声波测得的回波波峰处声程减小。若不涉及残余应力具体值,只关心应力变化的情况下,可以通过超声波对比法判断残余应力的变化。该方法具有实用性和可操作性。
Abstract
Using ultrasonic testing, residual stress values can be derived from sound elastic theory, but its real feasibility is restricted because practical sonic speed is difficult to accurately measure. The comparing experimental method was adopted to analyze the relationship of sonic speed and residual stress change based on the determined relationship. The result indicated that when the inner residual stress was increasing, the sound distance was reducing in the same disposition of echo wave peak. According to the regulation, it was applicable to use ultrasonic comparing method to judge the residual stress change when only considering the stress change without considering the specific residual stress value. The proposed method showed better practicability and maneuverability.
中图分类号 TG115.28
所属栏目 科研成果与学术交流
基金项目 国家自然科学基金资助项目(50675190)
收稿日期 2007/9/3
修改稿日期
网络出版日期
作者单位点击查看
备注李伟(1986-),女,硕士研究生,主要从事大型结构超声波探伤分析研究。
引用该论文: LI Wei,FU Yu-Ming,CHEN Ge-Xin,ZHENG Li-Juan. The Experimental Study on Residual Stress Change by Ultrasonic Comparing Testing of Plastic Deformation of Metals[J]. Nondestructive Testing, 2008, 30(9): 594~596
李伟,付宇明,陈革新,郑丽娟. 超声波对比法测试金属塑性变形前后残余应力的变化[J]. 无损检测, 2008, 30(9): 594~596
共有人对该论文发表了看法,其中:
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】朱伟,彭大暑,杨立斌,等.超声波法测定残余应力的原理及其应用[J].计量与测试技术,2001,32(6):25.
【2】Allen D R, Sayers. C M. The measurement of residual stress in textures using an ultrasonic velocity combinations technique[J]. Ultrasonic,1984,22(7):179.
【3】林邵峰,张宏建.计入构件形变影响的超声波测量应力的方法[J].浙江大学学报(工学版),2004,38(9):1132.
【4】Duquennoy M, Quaftouh M, Ourak M. Ultrasonic evaluation of stresses in orthotropic materials using Rayleigh waves[J]. NDT & E International,1999,(32):189-199.
【5】Bach F, Askegaard V. General stress-velocity expression in acousto-elasticity[J]. Experimental Mechanics,1979,(19):69-76.
【6】李喜孟.无损检测[M].北京:机械工业出版社,2001.
【2】Allen D R, Sayers. C M. The measurement of residual stress in textures using an ultrasonic velocity combinations technique[J]. Ultrasonic,1984,22(7):179.
【3】林邵峰,张宏建.计入构件形变影响的超声波测量应力的方法[J].浙江大学学报(工学版),2004,38(9):1132.
【4】Duquennoy M, Quaftouh M, Ourak M. Ultrasonic evaluation of stresses in orthotropic materials using Rayleigh waves[J]. NDT & E International,1999,(32):189-199.
【5】Bach F, Askegaard V. General stress-velocity expression in acousto-elasticity[J]. Experimental Mechanics,1979,(19):69-76.
【6】李喜孟.无损检测[M].北京:机械工业出版社,2001.
相关信息