A creep tester is a device used to test the deformation properties of materials under constant loads over a long period of time. It simulates the stresses and environmental conditions that a material will experience during its actual use to evaluate its creep resistance and lifetime.
First, the rationale.
Creep refers to the slow plastic deformation of a material with increasing time under constant load. By applying a constant tensile or compressive load to the specimen, the amount of deformation of the specimen over a certain period of time is measured, so that the creep curve of the material is obtained. Creep curves typically consist of three phases: an initial creep phase, a steady-state creep phase, and an accelerated creep phase. By analyzing the creep curve, it is possible to understand the creep properties and lifetime of the material.
Second, the main components of the creep testing machine.
Loading system: responsible for applying a constant tensile or compressive load to the specimen. Common loading methods include hammer type, spring type and servo motor type.
Measurement system: including displacement sensors, force sensors, etc., which are used to monitor the deformation and load of the test specimen in real time.
Control system: responsible for controlling the working state of the loading system to ensure the constant and stable load. At the same time, the control system can also realize multi-channel data acquisition and processing, which is convenient for users to analyze and process experimental data.
Environmental simulation system: It is used to simulate environmental conditions such as temperature and humidity during actual use in order to more accurately evaluate the creep resistance of materials.
Specimen grip: used to fix the specimen and ensure the stability of the specimen during the experiment.
Third, the field of application.
Creep testing machines are widely used in the creep resistance testing of various materials such as metal materials, plastics, rubber, composite materials, etc. In the fields of aerospace, automobile manufacturing, energy, construction, etc., it provides important technical support for the research and development and quality control of materials.
Fourth, the operation steps.
Prepare the specimen: According to the experimental requirements, prepare the specimen that meets the specifications.
Specimen mounting: The specimen is mounted on the fixture of the testing machine to ensure the stability of the specimen.
Set experimental parameters: According to the experimental requirements, set the parameters such as loading force, experimental time, and environmental conditions.
Start the experiment: Start the testing machine and conduct the experiment. During the experiment, the deformation and load of the test specimen are monitored in real time.
End of the experiment: After the experiment, the experimental data is recorded, the creep curve is analyzed, and the creep resistance and life of the material are evaluated.
Clean the testing machine: After the experiment, turn off the testing machine and clean up the test site.
5. Maintenance and maintenance.
Regularly inspect the various parts of the testing machine to ensure that they are working properly.
Keep the testing machine clean and avoid the influence of dust, oil and other influences on the testing machine.
For parts that need to be lubricated, add lubricating oil regularly to maintain a good lubrication condition.
For environmental simulation systems, regularly check the accuracy of parameters such as temperature and humidity to ensure the reliability of experimental results.
For the control system, regularly check the data acquisition and processing functions to ensure the accuracy of the experimental data.