Plastics are utilized in virtually every facet of our lives from the bottle that holds our beverage to the dashboard of our automobile. To ensure a high-quality end product it is important to understand the physical properties of these plastics throughout their lifecycle starting from the raw material.
In preparation for ANTEC we’ve prepared solutions to the top five challenges our customers face when testing plastics. Read the first Challenge/Solution now!
Challenge 1: Reproducibility
Reproducibility has proven to be a common issue in many labs when measuring Poisson’s Ratio. The difficulty in measuring the ratio directly relates to the measurement of the transverse and axial strain at very small strain ranges.
Solution: We recommend using a bi-axial, high-resolution extensometer that can measure both axial and transverse strain simultaneously.
Tip: We can’t stress enough that you use the appropriate grips and test methods. For grips, we suggest pneumatic side-acting grips because they are self-aligning and permit adjustable clamping pressures. When setting up your test method, a “preload” can improve your repeatability or results by removing the compressive loads applied during gripping and allowing each test to begin at the same positive load or stress value.
*Note: the preload value should be high enough that it will straighten a specimen without stretching it.
In preparation for ANTEC we’ve prepared solutions to the top five challenges our customers face when testing plastics. Read the first Challenge/Solution now!
Challenge 1: Reproducibility
Reproducibility has proven to be a common issue in many labs when measuring Poisson’s Ratio. The difficulty in measuring the ratio directly relates to the measurement of the transverse and axial strain at very small strain ranges.
Solution: We recommend using a bi-axial, high-resolution extensometer that can measure both axial and transverse strain simultaneously.
Tip: We can’t stress enough that you use the appropriate grips and test methods. For grips, we suggest pneumatic side-acting grips because they are self-aligning and permit adjustable clamping pressures. When setting up your test method, a “preload” can improve your repeatability or results by removing the compressive loads applied during gripping and allowing each test to begin at the same positive load or stress value.
*Note: the preload value should be high enough that it will straighten a specimen without stretching it.
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