Research on Method for Measuring Two-Dimensional Stress in Curved Surface Components Using Ultrasonic LCR Waves

Curved components are widely used in engineering practice, and accurate and non-destructive evaluation of the stress state of curved components is crucial to ensure the safe service of equipment. In view of the relative scarcity of research on the two-dimensional stress measurement of curved components, this paper proposes a two-dimensional stress measurement method based on array ultrasonic LCR waves, analyzes the influence of curvature on stress measurement, and derives an improved two-dimensional stress measurement model for curved components. The proposed method is simulated and verified using COMSOL software. Finally, a two-dimensional stress measurement system for curved components is built, and two-dimensional stress measurement of curved component specimens is performed based on pre-calibrated coefficients. The results show that within the range of 15-60MPa, the measurement standard deviation is less than 1.5MPa. The experimental results confirm that the two-dimensional stress measurement method for curved components proposed in this paper can effectively evaluate the stress state of curved components.