Author:
Zhu Yuhong,Zhao Hong,Song Cheng,Hu Bin
Abstract
Abstract
This experimental study aims to investigate the capability of the ultrasonic method by using critically refracted longitudinal (LCR) wave for measuring welding stress in elastic limits.Ultrasonic technique is based on the linear relation between the ultrasonic wave velocity and the stress, known as the acoustoelastic effect.To determine acoustoelasticconstants, different amounts of stress were applied to the specimens by using uniaxial tensiletesting machine. The outcome of the study showed a linear relation between time-of-flight (TOF) measured and the tensile stress in the samplesand providedthe acoustoelasticconstants of Q345. This paper also analyzed the measurement influence factors including the thickness of couplant, temperature and residual stress.
Subject
General Physics and Astronomy
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