How to reduce composite material testing variability?

Have you ever encountered the following situations:

Why did my sample test result fail?

The test result data of the laboratory fluctuates?

What should I do if the variability of the test results affects the product delivery?

My test results do not meet the customer's requirements. How to solve it? ......

For critical composite applications, more complex, additional testing is often required to determine the durability of the material under service conditions and typical environments. Producing high-quality test data is a huge challenge during material development, design and quality control needs.

In this regard, the UP-2003 series of large-load electronic universal testing systems [https://www.ubytestequipment.com/up-2003-double-column-universal-testing-machine-product/]and fatigue testing machines, combined with professional composite material fixtures and strain measurement devices, can meet various testing needs, and focus on the following 3C (Calibration, Control, Consistency) testing specification concept to ensure that customers can obtain high-quality test data that meets standard specifications as much as possible.

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1.Calibration

Equipment loading chain coaxiality calibration: The different axes of the loading chain can easily cause premature failure of the specimen. NADCAP certification stipulates that the acceptable bending percentage for static testing of composite materials is no more than 8%. How to verify and ensure the coaxiality under various test environments is particularly important.

Force sensor calibration: The force accuracy requirements for different applications vary greatly. Ensuring force accuracy within the measurement range is a prerequisite for ensuring the accuracy of test results.

Extensometer and strain gauge calibration: Traceable micro-strain measurement solution to ensure consistent strain measurement.

2. Control

Sample bending percentage: Different standards have strict requirements for sample bending percentage control. It is equally important to understand the standard requirements and actual operations.

Test environment control: For composite material testing in high and low temperature environments, there are some special concerns such as temperature compensation of strain gauges and automatic adjustment of test frequency, which are of great significance to test results and test efficiency.

Test process control: Good process control not only includes test operation steps, but also includes records of test method changes and statistics of result data.

3. Consistency

Specimen assembly consistency: Specimen assembly before the test, fixture clamping pressure, pre-load process control and other different steps have a great impact on the test results.

Test dimension measurement consistency: Dimension measurement needs to pay attention to factors such as sample surface treatment, measurement position, dimension calculation transmission, etc., so as to reduce the difference in the results.

Failure mode consistency: Effective control of sample fracture failure modes can greatly improve data validity. The above test specifications for composite materials can help most users understand and ensure the stability and reliability of test data.

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Country: China
Website: https://www.ubytestequipment.com/



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