Metal material fatigue test detection purposes:
The design of mechanical structures should take into account the effects of fatigue loading conditions. In some industrial fields (such as nuclear power, aerospace, and mechanical engineering), it is necessary to study the behavior of materials in cyclic plasticity under repeated strain control conditions (referring to low-cycle fatigue).
In order to clarify the reliability and consistency of test data in different laboratories, test data that meet certain key points of this national standard should be collected.
Metal material fatigue tester meets requirements:
Host: Metal fatigue tester should be able to start smoothly, and the test specimen can not overshoot when the test force crosses zero. The test machine shall have sufficient lateral rigidity and centering when the beam is in working position.
The entire mechanical loading system (including force sensors, clamps, and specimens) should have sufficient lateral stiffness, and the test machine should be capable of strain control and capable of measuring force values ​​when tested in accordance with the specified waveform. The testing machine can be hydraulic servo or electromechanical.
Force sensor: The force sensor should be applied to a metal fatigue tester with sufficient axial and lateral stiffness. Its carrying capacity should be able to meet the test needs.
The difference between the force value and the actual force value recorded from the computer's automatic collection system or from other non-automatic collection system output devices should be within the allowable range. The load-bearing capacity of the force sensor should be sufficient to cover the range of force values ​​during the test, and the measurement accuracy is better than the work%.
The force sensor should be capable of temperature compensated drift no more than 0.002% of full scale.
In the high temperature or low temperature test, the sensor should be properly insulated or compensated to ensure that its measurement accuracy is within the specified range.
Fixtures: Fixtures should be able to smoothly transfer the cyclic force to the longitudinal axis of the specimen. The distance between the upper and lower clamps should be as close as possible to avoid lateral instability. The geometry of the equipment should be well aligned to meet the requirements of 5.1.4. Therefore, the number of fixture components should be limited and the number of mechanical mating surfaces should be reduced as much as possible.
The fixture should ensure repeatability of the specimen during installation. The jig should have a surface that confirms the centering of the specimen and a surface that ensures smooth transfer of pressure during the test. The choice of material should take into account the effect of the test temperature range.
Test equipment selection:
Zhongchuang ZCPL-Metallic Material Fatigue Testing Machine (Electrohydraulic Servomotor-Static Universal Testing Machine) performs fatigue strength, fatigue life, torque fatigue, fatigue resistance and other performance tests for metal materials, materials products and semi-finished products.
Specific details please consult Jinan Zhongchuang Industrial Test System Co., Ltd. Sales Department
The design of mechanical structures should take into account the effects of fatigue loading conditions. In some industrial fields (such as nuclear power, aerospace, and mechanical engineering), it is necessary to study the behavior of materials in cyclic plasticity under repeated strain control conditions (referring to low-cycle fatigue).
In order to clarify the reliability and consistency of test data in different laboratories, test data that meet certain key points of this national standard should be collected.
Metal material fatigue tester meets requirements:
Host: Metal fatigue tester should be able to start smoothly, and the test specimen can not overshoot when the test force crosses zero. The test machine shall have sufficient lateral rigidity and centering when the beam is in working position.
The entire mechanical loading system (including force sensors, clamps, and specimens) should have sufficient lateral stiffness, and the test machine should be capable of strain control and capable of measuring force values ​​when tested in accordance with the specified waveform. The testing machine can be hydraulic servo or electromechanical.
Force sensor: The force sensor should be applied to a metal fatigue tester with sufficient axial and lateral stiffness. Its carrying capacity should be able to meet the test needs.
The difference between the force value and the actual force value recorded from the computer's automatic collection system or from other non-automatic collection system output devices should be within the allowable range. The load-bearing capacity of the force sensor should be sufficient to cover the range of force values ​​during the test, and the measurement accuracy is better than the work%.
The force sensor should be capable of temperature compensated drift no more than 0.002% of full scale.
In the high temperature or low temperature test, the sensor should be properly insulated or compensated to ensure that its measurement accuracy is within the specified range.
Fixtures: Fixtures should be able to smoothly transfer the cyclic force to the longitudinal axis of the specimen. The distance between the upper and lower clamps should be as close as possible to avoid lateral instability. The geometry of the equipment should be well aligned to meet the requirements of 5.1.4. Therefore, the number of fixture components should be limited and the number of mechanical mating surfaces should be reduced as much as possible.
The fixture should ensure repeatability of the specimen during installation. The jig should have a surface that confirms the centering of the specimen and a surface that ensures smooth transfer of pressure during the test. The choice of material should take into account the effect of the test temperature range.
Test equipment selection:
Zhongchuang ZCPL-Metallic Material Fatigue Testing Machine (Electrohydraulic Servomotor-Static Universal Testing Machine) performs fatigue strength, fatigue life, torque fatigue, fatigue resistance and other performance tests for metal materials, materials products and semi-finished products.
Specific details please consult Jinan Zhongchuang Industrial Test System Co., Ltd. Sales Department
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