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Normas BSI – AENOR
BS EN ISO 6721-1:2019

BS EN ISO 6721-1:2019

Plastics. Determination of dynamic mechanical properties. General principles

Fecha:
2019-06-10 /Definitive
Comité:
PRI/21
Equivalencias internacionales:

EN ISO 6721-1

ISO 6721-1

Relación con otras normas BSI:

Reemplaza a: BS EN ISO 6721-1:2011

Resumen:

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 document specifies the definitions and describes the general principles including all aspects that are common to the individual test methods described in the subsequent parts.

Different deformation modes can 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.

Keywords:
Deformation, Strain measurement, Tensile testing, Bend testing, Plastics and rubber technology, Dynamic testing, Mechanical properties of materials, Mechanical testing, Stress analysis, Plastics, Polymers
200,19
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