The ISO 1926 test method is suitable for use when testing rigid cellular polymeric materials.It investigates the strength and deformation properties of flexible cellular materials when a test piece is extended at a constant rate of displacement - until failure - to determine the tensile strength and elongation at break.
For this test, we use screw action grips, pneumatic action grips with rubber coated jaw faces for clamping of the material fitted to a tensile testing machine, either a single-column or dual-column table-top frame. Two methods of strain measurement can be adopted:
- A contacting long travel extensometer is attached to the test specimen
- A non-contacting extensometer, either an advanced video extensometer (AVE) or standard video extensometer (SVE), is attached to the frame's column and measures strain without contacting the specimen
Both extensometers are suitable for determining the material's relative change in length.
Using materials testing software, such as Bluehill® 2, allows you to input specimen details, set the desired test control, automatically calculate the desired results and statistics, and produce a test report all in accordance with the standard.
We suggest reviewing ISO 1926 to fully understand the test fixture and results requirements.