PRODUCTS
Non-Contact Video Extensometer for Tensile Testing
Use Case for AMEE 2D VEX
Accurately understanding material behavior is essential for efficient product design and manufacturing. Reliable products depend on advanced testing methods, and uniaxial tensile testing is one of the most widely used techniques for this purpose. This method provides critical insights into material properties such as strength, yield strength, and ductility by elongating a specimen along one axis until it fractures. A key tool for this analysis is the video extensometer, which enables precise and non-contact strain measurements.
Objective
This use case demonstrates how the AMEE 2D VEX video extensometer is used for tensile testing, offering a precise, non-contact solution for strain measurement.
Methods of Strain Measurement
Strain measurement during tensile testing can be approached in several ways, each with advantages and limitations:
❖ Crosshead Displacement: Calculating strain from the testing machine’s crosshead movement is simple but lacks accuracy and does not meet standard testing requirements.
❖ Strain Gauges: These are bonded to the specimen surface and provide accurate results. However, they require significant preparation and operator skill.
❖ Contact Extensometers: Clipped onto the specimen surface, these devices comply with standards but can damage thin or fragile specimens.
❖ Non-Contact Extensometers: These optical methods measure strain without touching the specimen, making them ideal for high-temperature tests or fragile materials. Non-contact systems are highly precise, provide full-field strain data, and enable post-processing to calculate additional results like principal strain and Poisson’s ratio.
Description of the Case Study
In this example, a tensile test was performed on a specimen fixed in a universal testing machine (UTM). The AMEE 2D VEX tracked displacement and strain throughout the test, providing accurate and detailed measurements.
Visual Results
Below are the key graphs illustrating the chainsaw blade’s vibration behavior:
❖ Displacement Tracking: The system captured precise elongation data during the test (Fig. 2).
❖ Specimen Elongation Graph: the elongation of the specimen throughout the test in mm (Fig. 3).
❖ Strain Field Visualization: Full-field strain distribution results offered valuable insights into material deformation (Fig. 4).
❖ Quantitative Strain Analysis: Average principal strains (E1 and E2) were calculated for further analysis (Fig. 5).
Benefits of using video extensometer for tensile testing
❖ Non-Contact Measurement: Ideal for fragile specimens or high-temperature environments.
❖ Compliance with Standards: Delivers precise and reliable results that meet industry requirements.
❖ Full-Field Results: Provides detailed strain distribution across the entire specimen.
❖ Ease of Setup: Quick and intuitive setup with minimal equipment.
❖ Versatile Data: Enables post-processing for additional calculations, including Poisson’s ratio and principal strain.
The AMEE 2D VEX video extensometer is a powerful and efficient solution for non-contact strain measurement in tensile testing. With its precision, ease of use, and advanced capabilities, it offers a superior alternative to traditional methods.
Learn more about the AMEE 2D VEX and its applications here.
For more information about vibration analysis and AMEE 2D VEX, please Contact us through email info@mercury-dic.com.
By Purchasing Our Products, Customer Care Is Not Over.
We’ll install your measurement system and help you solve your measurement problems. Our software and application engineers are here to help!