High-precision dynamic-loading fatigue test apparatus

Abstract

A high-precision dynamic loading test apparatus comprises a permanent magnet, an electromagnet, a force transducer, an installation support wall and a pedestal; a to-be measured workpiece is fixedly disposed on the pedestal via a clamping device; the installation support wall, which is equipped with the force transducer, is fixedly connected with the pedestal; the electromagnet and the force transducer are in an rigidity connection; the permanent magnet is disposed at the to-be measured workpiece; the electromagnet and the permanent magnet are in opposite positions with a setting distance which is larger than the amplitude of the to-be measured workpiece when in fatigue test. The high-precision dynamic-loading fatigue test apparatus has a loading mechanism with no direct contact with the to-be measured workpiece, is high in measure precision, simple in structure and easy to operate.

Description

technical field [0001] The invention relates to the field of fatigue testing Background technique [0002] The essence of fatigue testing is the process of providing stable periodic loads to target specimens through loading equipment to determine the number of fatigue stress or strain cycles of materials or structures. [0003] Fatigue testing machines can be divided into many types according to different loading methods and application fields, such as commonly used hydraulic and pneumatic equipment, eccentric loading equipment, and lever loading equipment, etc., but because the loading mechanism directly contacts the workpiece to be tested, it will affect the workpiece The influence of an impact force is generated, and the sensor moves with the loading mechanism, and the inertial force of the sensor itself will also affect the measurement accuracy. Moreover, under the high-frequency operation of the fatigue testing machine, the loading mechanism is worn out and the life is ...

AI Technical Summary

Problems solved by technology

[0003] Fatigue testing machines can be divided into many types according to different loading methods and application fields, such as commonly used hydraulic and pneumatic equipment, eccentric loading equipment, and lever loading equipment, etc., but because the loading mechanism directly contacts the workpiece to be tested, it will affect the workpiece The influence of an impact force is generated, and the sensor moves with the loading mechanism, and the inertial force of the sensor itself will also affect the measurement accuracy. Moreover, under the high-frequency operation of the fatigue testing machine, the loading mechanism is worn out and the service life is short.

The electromagnetic resonance fatigue testing machine can obtain higher test frequency and test accuracy, but relatively speaking, the operation is complicated and the cost is high

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