標準號：ISO 24999-2008
中文標準名稱：軟質泡沫聚合材料.使用恒定應變程序測定疲勞度
英文標準名稱：Flexible cellular polymeric materials - Determination of fatigue by a constant-strain procedure
標準類型：G32
發布日期：2008/7/1 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：G32
國際標準分類號：83.100
引用標準：ISO 1923
適用范圍：This International Standard specifies a method for determining the loss in thickness of flexible cellularmaterials when compressed repetitively to a fixed level of strain. It is particularly useful for quality control inthe manufacture of flexible polymeric cellular materials.Another procedure already exists as ISO 3385: this measures the fatigue characteristics of flexible polymericcellular materials by constant-stress loading of the specimen rather than constant strain. It forms the basis of amaterial classification system in ISO 5999.These two fatigue procedures are complementary to each other and can both be useful in the prediction ofend-use performance.The procedure and equipment used in this International Standard allow testing of a large number of testpieces at any one time, whereas ISO 3385 only allows testing of one test piece at a time under thecompression device.