Torsional fatigue testing device and method driven by magnetostrictive material
A magnetostrictive material, torsional fatigue technology, applied in the direction of analysis of materials, measuring devices, vibration testing, etc., can solve the problems of insufficient lateral restraint of specimens, transverse bending fatigue damage, torsional fatigue, etc., to avoid bending fatigue, use Simple and convenient, high reliability effect
Active Publication Date: 2020-02-28
NANTONG UNIVERSITY
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Problems solved by technology
However, due to insufficient lateral constraints on the specimen, this method will not only cause torsional fatigue when the torsional resonance of the specimen is excited, but also may cause transverse bending fatigue damage.
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[0028] The following examples can enable those skilled in the art to understand the present invention more comprehensively, but the present invention is not limited to the scope of the described examples.
[0029] Such as figure 1 and figure 2 As shown, a magnetostrictive material-driven torsional fatigue test device provided by the present invention is used to perform a torsional fatigue test on a test piece 4. The torsional fatigue test device includes: a base 1, a fixed frame 2, and an air thrust bearing 7 , Magnetostrictive driver 3, torsion angle displacement amplifier 5 and coupling turntable 6. Wherein, the base 1 is in the shape of a rectangular plate, and fixed frame guide columns 11 are vertically arranged at the four corners of the base 1 . The fixed frame 2 is a rectangular frame structure, and the fixed frame 2 is provided with a guide hole cooperating with the fixed frame guide column 11. The fixed frame 2 is nested on the fixed frame guide column 11 through t...
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The invention belongs to the technical field of torsional fatigue strength testing, and relates to a torsional fatigue testing device driven by a magnetostrictive material. The device provided by theinvention comprises a base, a fixed frame, an air thrust bearing, magnetostriction drivers, a torsion angular displacement amplifier and a coupling turntable; the four magnetostrictive material drivers are symmetrically arranged on the inner side of the fixed frame in a staggered mode. Ultrahigh-frequency torsion driving and testing of a test piece are achieved through a coupling rotary disc and atorsion angular displacement amplifier which are connected with the magnetostriction material drivers, the stability is good, the reliability is high, and the problems of fatigue and overheating failure are avoided; in addition, when the device generates torsion power torque, no additional transverse force is generated, and bending deformation vibration is avoided. The invention further providesthe torsional fatigue testing method which is simple, easy to operate and suitable for wide industrial application.
Description
technical field [0001] The invention relates to the technical field of torsional fatigue strength testing, in particular to a torsional fatigue test device and method driven by a magnetostrictive material. Background technique [0002] Fatigue is the failure phenomenon of engineering structural components under cyclic loading. Many equipment or facilities in modern engineering, such as aerospace vehicles (aircraft, rockets, spaceships, etc.), high-speed train vehicles and tracks, automobiles, power generation equipment, construction machinery, bridges, etc., their main parts or components are changing with time Fatigue is the main failure mode when working under high load. With the rapid development of technologies in the fields of aerospace, automobiles, high-speed railways, and nuclear industries, the number of cycles of vibration loads that many equipment components will withstand during their service life will be as high as 10 9 ~10 11 , belongs to the category of ult...
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Login to View More IPC IPC(8): G01M7/02G01M13/00G01N3/22G01N3/32
CPCG01M7/00G01M13/00G01N3/22G01N3/32G01N2203/0021G01N2203/0073
Inventor 金江曹小建
Owner NANTONG UNIVERSITY