What is an electro-hydraulic servo fatigue testing machine?
In the fields of industrial manufacturing, materials science and engineering testing, the electro-hydraulic servo fatigue testing machine is a key test equipment used to simulate the fatigue performance of materials or structures under repeated loading. This article will introduce in detail its definition, working principle, application scenarios and comparison of popular models in the market to help readers fully understand this technology.
1. Definition of electro-hydraulic servo fatigue testing machine
The electro-hydraulic servo fatigue testing machine is a high-precision testing equipment that controls load and displacement through an electro-hydraulic servo system. It is mainly used for dynamic fatigue testing of materials or components. Its core feature is that it can simulate high-frequency cyclic loads in actual working conditions and evaluate the durability and life of the specimen.
2. Working principle
The equipment controls the flow and pressure of hydraulic oil through an electro-hydraulic servo valve and drives the actuator to apply periodic loads to the specimen. The system feeds back load, displacement and other data in real time through sensors to form a closed-loop control to ensure test accuracy.
| components | Function |
|---|---|
| servo valve | Adjust hydraulic oil flow and direction |
| actuator | Apply dynamic loads |
| sensor | Real-time monitoring of load, displacement and other parameters |
| controller | Process the feedback signal and adjust the output |
3. Application scenarios
Electro-hydraulic servo fatigue testing machine is widely used in the following fields:
| Industry | Specific applications |
|---|---|
| Aerospace | Fatigue testing of aircraft landing gear and engine components |
| automobile manufacturing | Chassis and suspension system durability evaluation |
| construction project | Seismic performance testing of bridges and steel structures |
| Materials Science | Research on fatigue characteristics of metals and composite materials |
4. Comparison of popular models in the market (latest data in 2024)
| Model | Maximum load(kN) | Frequency range(Hz) | Brand | Typical applications |
|---|---|---|---|---|
| Instron 8802 | 250 | 0.01-100 | Instron | High-precision material testing |
| MTS 370.10 | 100 | 0.001-50 | MTS | Auto parts testing |
| Shimadzu EHF-LV | 50 | 0.1-200 | Shimadzu | High frequency fatigue research |
5. Technical advantages
1.High precision control: Closed-loop control accuracy can reach ±0.5% of full scale;
2.Broad frequency range:Support dynamic testing from 0.001Hz to 200Hz;
3.Multifunctional expansion: Can integrate high temperature, corrosion and other environmental simulation modules;
4.data integrity: Comply with ASTM E466, ISO 12106 and other international standards.
6. Purchase suggestions
Things to consider when choosing an electro-hydraulic servo fatigue testing machine:
-Testing requirements: Clarify the load range, frequency and specimen size;
-Brand service: Give priority to brands that provide localized technical support;
-Scalability: Reserve space for future upgrades (such as multi-channel collaborative testing).
7. Industry development trends
According to recent industry reports, electro-hydraulic servo fatigue testing machines are showing the following trends:
1.Intelligent: AI algorithm is used to predict material fatigue life;
2.Modular design: Quickly change fixtures and environmental simulation chambers;
3.Green energy saving: The new hydraulic system reduces energy consumption by more than 30%.
In summary, the electro-hydraulic servo fatigue testing machine is the core equipment for modern industrial R&D and quality control, and its technological development will continue to promote the progress of materials science and engineering safety.
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