ISO 844 – Rigid Cellular Plastics Compression Properties
ISO 844 Testing is the compressive strength of a cellular material determined by applying load to a test specimen with a square or circular cross section.
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Açıklama
ISO 844 Rigid Cellular Plastics Compression Properties
ISO 844 Testing is the compressive strength of a cellular material determined by applying load to a test specimen with a square or circular cross section.
These test specimens are carefully prepared so the faces are parallel to each other and perpendicular to the sides.
Touchstone is also able to perform the technically equivalent standard, ASTM D1621
The test specimens must be conditioned for no less than 6 hours at 23 ± 2°C (73.4 ± 3.6°F) and 50% ± 5% relative humidity.
Touchstone has a large environmental chamber capable of conditioning a wide range of sample sizes.
The test specimens are centered between two compression platens and load is applied at a constant crosshead or actuator rate.
Crosshead travel (displacement) and load are recorded throughout the test.
Compressive strength can be determined in one of two manners, Peak or 10% deformation stress, depending on the characteristics of the stress-displacement curve.
After testing and analysis, compressive strength, modulus and deformation at maximum load are reported.
The data obtained from the compression tests provide a standard method of obtaining data for research and development and quality control.
*** Before conducting ISO 844 , it is important to read the entire specification. Standards can be obtained from appropriate standard authorities.
References
ASTM D1621 – Standard Test Method for Compressive Properties of Rigid Cellular
***PARSROS offers several types of grips and fixtures which will enable you to perform a variety of tests
that are accurate and repeatable
