Device and method for testing fatigue mechanical property of material under tensile-bending composite load

Abstract

The invention relates to a device and a method for testing the fatigue mechanical property of a material under a tensile-bending composite load, and belongs to the field of precision scientific instruments and material testing. The device comprises a vibration isolation base, a supporting frame, an ultrasonic loading module, a hydraulic loading module, a tensile loading module and an ultrasonic flaw detection module; the supporting frame is connected with the vibration isolation base; the hydraulic loading module is connected with the supporting frame through a connecting flange; the ultrasonic loading module is connected with the hydraulic loading module through a thread; and the tensile loading module and the ultrasonic flaw detection module are arranged on the vibration isolation base.The device has the advantages as follows: high-frequency and high-load cross-range loading can be realized; ultrahigh-frequency bending fatigue loading and tensile-bending static dynamic composite load loading can be realized; and the tensile loading module can ensure accurate centering of tested material samples. The tested material samples made of different materials and having different sizes can be subjected to high-frequency fatigue testing under the static dynamic composite load; and a reliable means is provided for service performance analysis of key materials in aerospace and numerousfields.

Description

technical field [0001] The invention relates to the field of precision scientific instruments and material testing, in particular to a device and method for testing material fatigue mechanical properties under tensile-bending composite load. The device can carry out several tests such as traditional static tensile loading test, high-frequency bending fatigue loading test, ultra-high frequency bending fatigue loading test, etc., and can also realize tensile-bending composite loading high frequency under frequency and load cross-range loading Fatigue test, in-situ monitoring of the crack generation and propagation of the tested material during the test, provides a test method for revealing the correlation law between the fatigue mechanical properties of the tested material and the applied load and the fatigue damage mechanism. Background technique [0002] In recent decades, with the rapid progress of national science and technology and the vigorous development of the national...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a device and method for testing the fatigue mechanical properties of materials under tensile-bending composite loads, which can solve the problem that the existing testing methods cannot realize the loading of frequencies and loads across the range and the ultra-high performance under the tensile-bending composite loads. High Frequency Fatigue Loading Problem

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