Apparatus for measuring plane stress of anisotropic material

Abstract

The invention relates to a material plane stress detection device, in particular, an apparatus for measuring the plane stress of an anisotropic material. The objective of the invention is to solve the problem of low measurement accuracy of an existing stress detection method. The device includes an ultrasonic transducer group, an ultrasonic oblique incidence wedge, a signal generator, a digital oscilloscope and analysis processing software; a first ultrasonic longitudinal wave excitation probe, a second ultrasonic longitudinal wave excitation probe and a third ultrasonic longitudinal wave excitation probe are all connected with the signal generator; a first ultrasonic longitudinal wave receiving probe, a second ultrasonic longitudinal wave receiving probe and a third ultrasonic longitudinal wave receiving probe are all connected with the digital oscilloscope; the signal generator is connected with the digital oscilloscope; and the analysis processing software is connected with the digital oscilloscope. According to the device, critical refraction longitudinal waves are adopted as a detection wave source based on an anisotropic three-way method. The device has the advantages of high measurement efficiency and simple operation. The device can be widely applied to the detection and analysis of plane stress in anisotropic materials in aerospace, weapon manufacturing and vehicle fields and so on.

Description

technical field [0001] The invention relates to a material plane stress detection device. Background technique [0002] In recent years, with the development and progress of material science, a large number of advanced materials have been widely used in various fields. However, advanced materials are often different from traditional metal materials, and most of them are composed of different components, which makes the materials exhibit anisotropic properties. [0003] The traditional ultrasonic method for stress detection mainly adopts the method of sending and receiving or spontaneously sending and receiving. The effect of material anisotropy on ultrasonic propagation, so the measurement accuracy is not high and the convincing power is not strong. Contents of the invention [0004] The present invention is to solve the problem of low measurement accuracy of existing stress detection methods. Based on the principle of anisotropic three-way method, critical refraction lo...

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