An Ultrasonic Fatigue Stress Amplification Device with Unified Sample Size
A fatigue stress and amplifying device technology, which is applied in the direction of measuring devices, using repeated force/pulsation force to test the strength of materials, instruments, etc., can solve the problems of poor stability and accuracy, low performance, etc., and achieve convenient operation and high performance Good, the effect of saving material consumption
Active Publication Date: 2021-05-11
SICHUAN UNIV
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[0003] The purpose of the present invention is to provide an ultrasonic fatigue stress amplification device with uniform sample size to solve the problems of low performance, poor stability and accuracy of existing material performance testing devices
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[0020] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0021] Such as Figure 1 to Figure 3 As shown, an ultrasonic fatigue stress amplification device with a uniform sample size includes an ultrasonic transducer 1, an extension rod 2 axially mated and connected to the end of the ultrasonic transducer 1, and an extension rod 2 connected to the extension rod 2 away from the ultrasonic transducer The adjustable stress amplification mechanism 3 at the end of the device 1. The ultrasonic transducer 1 converts electromagnetic energy into sound energy. The ultrasonic transducer 1 and the extension rod 2 are connected through M12 threads to meet the first-order vibration frequency in the axial direction. The extension rod 2 and the adjustable stress amplification mechanism 3 p...
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The invention discloses an ultrasonic fatigue stress amplifying device with uniform sample size, which comprises an ultrasonic transducer, an extension rod axially mated and connected to the end of the ultrasonic transducer, and a mated connection connected to the end of the extension rod away from the ultrasonic transducer The unique adjustable stress amplification mechanism; its structure is reliable, the performance is good, and the operation is convenient. Through the mutual cooperation between the ultrasonic transducer, the extension rod and the adjustable stress amplification mechanism, the stress wave transmission is reliable and stable, and the fatigue performance of the material is realized. Accurate testing greatly saves the amount of materials used in ultrasonic fatigue tests, and significantly increases the maximum stress loading value of the middle section, playing the role of high stress loading under low vibration.
Description
technical field [0001] The invention relates to the technical field of material performance testing, in particular to an ultrasonic fatigue stress amplification device with uniform sample size. Background technique [0002] Long life and high reliability are the pursuit goals of major national equipment and structures. The test of material ultra-long life fatigue performance is the premise to ensure the safe service of key components. At present, the ultrasonic vibration fatigue loading technology is the best way to carry out ultra-long life fatigue research of metal materials. efficient method. However, there are currently the following problems: the stress magnification of ultrasonic vibration loading is usually less than 5, and it is constant and invariable. The amplitude of ultrasonic vibration is limited. After amplification, the maximum stress is only 100 microns. The material cannot be tested. The design requirements of the sample strictly meet the requirements of t...
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IPC IPC(8): G01N3/32G01N3/02
CPCG01N3/02G01N3/32
Inventor 何超王清远王宠刘永杰李雪李浪张宏
Owner SICHUAN UNIV