標準號：DIN EN ISO 6721-1-2011
中文標準名稱：塑料.動態機械性能測定.第1部分:一般原理(ISO 6721-1-2011).德文版本EN ISO 6721-1-2011
英文標準名稱：Plastics - Determination of dynamic mechanical properties - Part 1: General principles (ISO 6721-1:2011); German version EN ISO 6721-1:2011
標準類型：G31
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：G31
國際標準分類號：83.080.01
引用標準：ISO 291;ISO 293;ISO 294;ISO 295;ISO 1268;ISO 2818;ISO 4593;ISO 6721-2-2008;ISO 6721-3
適用范圍：The various parts of ISO 6721 specify methods for the determination of the dynamic mechanical properties of rigid plastics within the region of linear viscoelastic behaviour. This part of ISO 6721 is an introductory section which includes the definitions and all aspects that are common to the individual test methods described in the subsequent parts. Different deformation modes may produce results that are not directly comparable. For example, tensile vibration results in a stress which is uniform across the whole thickness of the specimen, whereas flexural measurements are influenced preferentially by the properties of the surface regions of the specimen. Values derived from flexural-test data will be comparable to those derived from tensile-test data only at strain levels where the stress-strain relationship is linear and for specimens which have a homogeneous structure.