NF EN ISO 16808

NF EN ISO 16808

May 2022
Standard Current

Metallic materials - Sheet and strip - Determination of biaxial stress-strain curve by means of bulge test with optical measuring systems

This document specifies a method for determination of the biaxial stress-strain curve of metallic sheets having a thickness below 3 mm in pure stretch forming without significant friction influence. In comparison with tensile test results, higher strain values can be achieved.NOTE      In this document, the term "biaxial stress-strain curve" is used for simplification. In principle, in the test the "biaxial true stress-true strain curve" is determined.

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Main informations

Collections

National standards and national normative documents

Publication date

May 2022

Number of pages

38 p.

Reference

NF EN ISO 16808

ICS Codes

77.040.10   Mechanical testing of metals

Classification index

A03-005

Print number

1

International kinship

ISO 16808:2022

European kinship

EN ISO 16808:2022
Sumary
Metallic materials - Sheet and strip - Determination of biaxial stress-strain curve by means of bulge test with optical measuring systems

This document specifies a method for determination of the biaxial stress-strain curve of metallic sheets having a thickness below 3 mm in pure stretch forming without significant friction influence. In comparison with tensile test results, higher strain values can be achieved.

NOTE      In this document, the term "biaxial stress-strain curve" is used for simplification. In principle, in the test the "biaxial true stress-true strain curve" is determined.

Replaced standards (1)
NF EN ISO 16808
October 2014
Standard Cancelled
Metallic materials- Sheet and strip - Determination of biaxial stress-strain curve by means of bulge test with optical measuring systems

ISO 16808:2014 specifies a method for determination of the biaxial stress-strain curve of metallic sheets having a thickness below 3 mm in pure stretch forming without significant friction influence. In comparison with tensile test results, higher strain values can be achieved.

Table of contents
  • Avant-propos
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Symboles et abréviations
  • 5 Principe
  • 6 Equipement d'essai
  • 7 Système de mesure optique
  • 8 Éprouvette
  • 9 Mode opératoire
  • 10 Méthodes d'évaluation pour la détermination de la courbure et des déformations au niveau du dôme
  • 11 Calcul des courbes contrainte-déformation biaxiales
  • 12 Rapport d'essai
  • Annexe A (informative) Procédure d'essai pour une vérification de la qualité du système de mesure optique
  • Annexe B (informative) Estimation de la courbure sur la base d'une surface de réponse
  • Annexe C (informative) Détermination du point de contrainte équi-biaxiale de la zone d'écoulement et de la courbe d'écrouissage
  • Bibliographie
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