ISO 37:2017 ゴム、加硫または熱可塑性プラスチック—引張応力-ひずみ特性の決定 | ページ 2

Foreword

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The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives ).

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This document was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 2, Testing and analysis.

This sixth edition cancels and replaces the fifth edition (ISO 37:2011), which has been technically revised.

The main changes compared to the previous edition are as follows:

• the cutter angle range in Figure 3 has been changed to 30° - 35°;
• dimension B of the dumb-bell test piece has been corrected in Figure 3;
• accuracy requirement for force measurement has been changed to Class 1;
• dimensions of ∅d₁ and ∅d₂ in Figure 5 and Table 3 have been corrected;
• the test results of interlaboratory test programmes (ITP) have been added.

1 Scope

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.

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

3.9

elongation at yield

E_y

tensile strain at the first point on the stress-strain curve where some further increase in strain is not accompanied by an increase in stress

Note 1 to entry: See Figure 1.

Figure 1 — Illustration of tensile terms

a)

b)

c)

Key

E	elongation	Sy	stress at yield
Eb	elongation at break	ts	tensile strength
Ey	elongation at yield	tsb	tensile strength at break
S	stress	Y	yield point

Bibliography