摘要
机械构件及产品制造过程中必然会引入残余应力,残余应力对构件性能和服役寿命有重要影响。残余应力的测试方法众多,X射线测试技术作为一种非破坏性测试方法,由于其理论成熟、方法简单,在工程上得到了广泛应用。分析了残余应力的表征问题,对残余应力定义、表征中的几个易混淆概念从弹性力学的角度做了进一步解释;分析了线性拟合和椭圆拟合的条件。
Residual stress will inevitably be introduced during the manufacture of mechanical components and products.Residual stress has an important impact on component performance and service life.There are many methods for testing residual stress.As a nondestructive testing method,X-ray testing technology has been widely used in engineering due to its mature theory and simple method.The characterization of residual stress is analyzed,and several confusing concepts in the definition and characterization of residual stress are further explained from the perspective of elastic mechanics;the conditions of linear fitting and ellipse fitting are analyzed.
作者
巴发海
刘宇希
BA Fahai;LIU Yuxi(Shanghai Key Laboratory of Engineering Materials Application and Evaluation,Shanghai Research Institute of Materials,Shanghai 200437,China)
出处
《无损检测》
2020年第10期1-3,58,共4页
Nondestructive Testing
关键词
残余应力
X射线法
测量
residual stress
X-ray method
measuring
