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Ultrasonic fatigue stress amplifying device with unified sample size

A fatigue stress and amplifying device technology, applied in measuring devices, using repetitive force/pulse force to test the strength of materials, instruments, etc., can solve the problems of low performance, poor stability and accuracy, and achieve good performance and operation. Convenient and adjustable effect

Active Publication Date: 2020-10-30
SICHUAN UNIV
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  • Abstract
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Problems solved by technology

[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

Method used

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  • Ultrasonic fatigue stress amplifying device with unified sample size
  • Ultrasonic fatigue stress amplifying device with unified sample size
  • Ultrasonic fatigue stress amplifying device with unified sample size

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Embodiment Construction

[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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Abstract

The invention discloses an ultrasonic fatigue stress amplification device with a unified sample size. The ultrasonic fatigue stress amplification device comprises an ultrasonic transducer, an extension rod axially connected to the end of the ultrasonic transducer in a matched mode and an adjustable stress amplification mechanism connected to the end, away from the ultrasonic transducer, of the extension rod in a matched mode. The device is reliable in structure, high in use performance and convenient to operate, through cooperation of the ultrasonic transducer, the extension rod and the adjustable stress amplification mechanism, the stress wave transmission is reliable and stable, the fatigue performance of the material is accurately tested, the material consumption of the ultrasonic fatigue test is greatly saved, the maximum stress loading value of the middle section is remarkably improved, and the high stress loading effect under low vibration is achieved.

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...

Claims

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Application Information

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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
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