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The fatigue testing machine is used to determine the fatigue characteristics, fatigue life, prefabricated cracks, and crack propagation of metals, alloys, and their components (such as operating joints, fasteners, helical motion parts, etc.) under tensile, compression, or tensile-compressive alternating loads at room temperature. Fatigue testing machines are generally classified into the following categories:
By Loading Method: Tension-compression fatigue, bending fatigue, torsional fatigue, etc.
By Stress Ratio: Symmetric fatigue, asymmetric fatigue.
By Testing Environment: Room temperature fatigue, low-temperature fatigue, high-temperature fatigue, corrosive fatigue, etc.
By Stress Cycle Number at Fracture: Low-cycle fatigue, high-cycle fatigue.
By Frequency: Low-frequency fatigue, medium-frequency fatigue, high-frequency fatigue, ultra-high-frequency fatigue.
A fatigue testing machine is a device used to evaluate the fatigue performance of materials or components under cyclic loading. Its basic working principle is to apply periodic alternating loads to simulate the long-term stress conditions experienced by the product in real-world applications until the specimen undergoes fatigue failure (such as crack initiation, propagation, or fracture).
Fatigue testing involves applying repeated cyclic loads to a material or component to simulate the long-term stress conditions it would experience in real-world applications. The goal is to assess potential fatigue failure over time. For products, fatigue testing helps ensure safety and reliability during actual use, especially for components subjected to frequent stress cycles, such as automotive parts and aerospace components.
Fatigue testing is typically conducted in accordance with international and industry standards. Common standards include:
The duration of a fatigue test depends on several factors, including the material type, loading conditions, frequency, expected number of cycles, and equipment capability. Some simple tests may be completed in a few days, while more complex tests may take several weeks or even months. The exact time depends on your specific requirements and test parameters.
1. Caption: Example of Fatigue Testing results.
| stress range (MPa) | cycle number (N) |
|---|---|
| 80 | 500,000 |
| 100 | 300,000 |
| 120 | 150,000 |
| 140 | 31,6115 |
The fatigue testing machine is a device used to simulate and test the fatigue performance of materials under repeated loading conditions, assessing the material's durability and lifespan by applying cyclic stress or strain. It is widely used in fields such as aerospace, automotive, and mechanical engineering to verify the reliability and safety of materials and components in real-world applications.
