ISO 10113:2020 pdf download

ISO 10113:2020 pdf download.Metallic materials — Sheet and strip — Determination of plastic strain ratio
1 Scope
This document specifies a method for determining the plastic strain ratio of flat products (sheet and strip) made of metallic materials.
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 6892-1:2019, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
ISO 9513, Metallic materials — Calibration of extensometer systems used in uniaxial testing
ISO 80000-1, Quantities and units — Part 1: General
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 6892-1 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
Note 1 to entry: The above expression using a single point is only valid in the region where the plastic strain is homogeneous.
Note 2 to entry: Since it is easier and more precise to measure changes in length than in thickness, the following relationship derived from the law of constancy of volume is used up to the percentage plastic extension at maximum force, A g , to calculate the plastic strain ratio, r [see Formula (2)].
Note 3 to entry: For some materials exhibiting a phase change during plastic deformation, the volume of the measured section cannot always be assumed to be constant. In such cases, the procedure shall be defined and agreed between the parties involved.
Note 4 to entry: As the value r depends on the orientation of the test piece relative to the rolling direction, as well as on the strain, the symbol r can be supplemented by the angle which characterises this orientation and the plastic (engineering) strain. For example r 45/20 (see Table 1).
4 Symbols
The designations of the symbols used in this document are given in Table 1.
5 Principle
The plastic strain ratio r is often used for the characterisation and qualification of materials, and for the numerical simulation of forming processes. To determine the plastic strain ratio, a test piece is subjected to a tensile test to a specified plastic (engineering) strain and the plastic strain ratio, r, is calculated from measurements of the changes in width and thickness after unloading or after subtraction of the elastic strains. However, it is easier and more precise to measure changes in length than in thickness. Therefore, the plastic strain ratio r is typically derived from changes in length and width using the law of constancy of volume, see Formula (5).