Tensile Testing of Thin Films to ASTM D882 / ISO 527-3
This video explores the key aspects of tensile testing for thin films using the ASTM D882 and ISO 527-3 standards. These methods are essential for accurately measuring the tensile properties of delicate materials like plastic films and other thin specimens.
What you'll learn:
- Importance of accurate specimen dimensioning
- Recommended specimen sizes and measurement techniques
- Best practices for gripping and alignment
- Use of extensometers, including Instron’s AVE advanced video extensometer
- Key test results for both ASTM D882 and ISO 527-3
[00:00:05] Speaker: ASTM D882 and ISO 527-3 are common testing standards used for measuring the tensile properties of thin films.
[00:00:14] Speaker: Due to the thin nature of these materials, accurate measurement of specimen dimensions is critical.
[00:00:20] Speaker: Specimen length and width are dependent on expected elongation and desired results, but typically start at one inch wide and range between 4 and 10in long.
[00:00:29] Speaker: It's important to check with the standard to verify the proper dimensions for your material.
[00:00:34] Speaker: Three measurements should be average to determine the specimens width and thickness.
[00:00:38] Speaker: A digital micrometer is a suitable option for taking these measurements.
[00:00:43] Speaker: Grips must be able to accommodate the thinning of the specimen as the test progresses.
[00:00:48] Speaker: Pneumatic side action grips are the preferred gripping solution because they provide a consistent clamping force.
[00:00:54] Speaker: Jaw face selection depends on the thickness and strength of the material. Rubber or smooth faces are the most commonly used.
[00:01:01] Speaker: Specimen alignment is critical and specimen re-insertion should be avoided.
[00:01:07] Speaker: Repeatability and throughput can be improved by using an alignment and insertion device, such as Instron’s Precision Specimen Loader.
[00:01:15] Speaker: It is recommended to use an extensometer for calculating modulus results.
[00:01:20] Speaker: Any extensometer used requires a measurement accuracy of plus or -1% error.
[00:01:26] Speaker: Instron's AVE Advanced Video Extensometer is a non-contact solution ideally suited for measuring strain in delicate specimens such as thin films.
[00:01:36] Speaker: Key results for ASTM D882 include strain at break, braking factor, tensile strength, yield strength and elongation at yield.
[00:01:46] Speaker: Key results for ISO 527-3 include nominal strain at yield and brake, tensile stress at yield, and tensile stress at break.
[00:01:56] Speaker: While this video will hopefully provide some general insight into this topic, we always recommend connecting with your local sales engineer to discuss your specific needs.
[00:02:05] Speaker: For more information, visit our website or contact us with any questions.
[00:02:09] Speaker: Thanks for watching.
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