ISO 37:2017 pdf free.Rubber, Vulcanized Or Thermoplastic – Determination Of Tensile Stress-Strain Properties.
This document specifies a method for the determination of the tensile stress-strain properties of vulcanized and thermoplastic rubbers.
The properties which can be determined are tensile strength, elongation at break, stress at a given elongation, elongation at a given stress, stress at yield and elongation at yield. The measurement of stress and strain at yield applies only to some thermoplastic rubbers and certain other compounds.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 5893, Rubber and plastics test equipment — Tensile,flexural and compression types (constant rate of traverse) — Specification.
ISO 23529:2016, Rubber — General procedures for preparing and conditioning test pieces for physical test met hods.
4 Principle
Standard test pieces, either dumb-bells or rings, are stretched in a tensile-testing machine at a constant rate of traverse of the driven grip or pulley. Readings of force and elongation are taken as required during the uninterrupted stretching of the test piece and when it breaks.
5 General
Dumb-bell and ring test pieces do not necessarily give the same values for their respective stress-strain properties. This is mainly because in stretched rings, the stress is not uniform over the cross-section. A second factor is in the existence of “grain” which might cause dumb-bells to give different values depending on whether their length is parallel or at right angles to the grain.ISO 37:2017 pdf free download.