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ASTM D3574 X6 | Foam | Compression Testing

ASTM D3574 is a commonly used standard for tests involving flexible cellular foam materials. ASTM D3574 X6 specifies a method for measuring the hysteresis energy loss of foams. Hysteresis loss is defined as the difference between the loading energy and the unloading energy expressed as a percentage of the loading energy. This analysis will help to better characterize and compare various foams and determine their ideal applications. The test may be performed as either an Indentation Force Deflection (IFD) test, or as a Compression Force Deflection (CFD) test.

Prior to conducting ASTM D3574 X6, it is important to read the entire specification in the relevant ASTM publication.

ASTM D3574 X6 | Foam | Compression Testing

  1. Prepare and preflex samples in accordance with ASTM D3574 Test B1 (IFD) for samples with area larger than the indenting platen. For samples with area smaller than the compression platen, prepare and preflex samples in accordance with ASTM D3574 Test C (CFD).
  2. Wait 6 ± 1 minutes after preflex to allow foam sample to rest.
  3. Indent the sample at the rate specified in the standard.
  4. Immediately remove the indentation force at the same rate as the initial indentation.
Calculations:
  • Hysteresis Loss

ASTM D3574 X6 | Foam | Compression Testing

ASTM D3574 X6 | Foam | Compression Testing

ASTM D3574 X6Recommended Equipment
Testing System
Fixturing
  • An upper compression platen with which to deflect the foam sample:
    • For IFD testing, a flat circular indenter foot measuring 203 mm in diameter and connected by means of a swivel joint.
    • For CFD testing, a flat compression foot which is larger than the specimen to be tested.
  • A lower compression platen with 6.5 mm holes on approximately 20 mm centers to allow for rapid escape of air during the test.
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