Aktivní norma | Vydána: 23.06.2008

ISO 24999:2008

Flexible cellular polymeric materials — Determination of fatigue by a constant-strain procedure
(Matériaux polymeres alvéolaires souples — Détermination de la fatigue par un procédé de déformation constante)

Dostupné jazyky: Anglicky

Dostupné provedení: Elektronické PDF, Tištěné

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Podrobné informace

Označení: ISO 24999:2008

Datum vydání: 23.06.2008

Stran: 6

Země: Mezinárodní technická norma

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Anotace

Description / Abstract: ISO 24999:2008 specifies a method for determining the loss in thickness of flexible cellular materials when compressed repetitively to a fixed level of strain. It is particularly useful for quality control in the manufacture of flexible polymeric cellular materials. Another procedure already exists as ISO 3385: this measures the fatigue characteristics of flexible polymeric cellular materials by constant-stress loading of the specimen rather than constant strain. It forms the basis of a material classification system in ISO 5999. These two fatigue procedures are complementary to each other and can both be useful in the prediction of end-use performance. The procedure and equipment used in this International Standard allow testing of a large number of test pieces at any one time, whereas ISO 3385 only allows testing of one test piece at a time under the compression device.

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