NF EN ISO 12004-2

NF EN ISO 12004-2

March 2021
Standard Current

Metallic materials - Determination of forming-limit curves for sheet and strip - Part 2 : determination of forming-limit curves in the laboratory

This document specifies testing conditions for use when constructing a forming-limit curve (FLC) at ambient temperature and using linear strain paths. The material considered is flat, metallic and of thickness between 0,3 mm and 4 mm.NOTE The limitation in thickness of up to 4 mm is proposed, giving a maximum allowable thickness to the punch diameter ratio.

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Collections

National standards and national normative documents

Publication date

March 2021

Number of pages

36 p.

Reference

NF EN ISO 12004-2

ICS Codes

77.040.10   Mechanical testing of metals

Classification index

A03-670-2

Print number

1

International kinship

ISO 12004-2:2021

European kinship

EN ISO 12004-2:2021
Sumary
Metallic materials - Determination of forming-limit curves for sheet and strip - Part 2 : determination of forming-limit curves in the laboratory

This document specifies testing conditions for use when constructing a forming-limit curve (FLC) at ambient temperature and using linear strain paths. The material considered is flat, metallic and of thickness between 0,3 mm and 4 mm.

NOTE The limitation in thickness of up to 4 mm is proposed, giving a maximum allowable thickness to the punch diameter ratio.

Replaced standards (1)
NF EN ISO 12004-2
December 2008
Standard Cancelled
Metallic materials - Sheet and strip - Determination of forming-limit curves - Part 2 : determination of forming-limit curves in laboratory

Le présent document spécifie les conditions d'essai à utiliser pour la construction d'une courbe limite de formage (CLF) à la température ambiante et au moyen de chemins linéaires de déformation, pour les tôles et bandes métalliques d'épaisseur comprise entre 0,3 mm et 4 mm.

Table of contents
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Symboles
  • 5 Principe
  • 6 Éprouvettes et équipement
  • 7 Analyse du profil de déformation et détermination des paires e 1 - e
    2
  • 8 Documentation
  • 9 Rapport d'essai
  • Annexe A Dérivée seconde et dérivée seconde "filtrée"
  • Annexe B Calcul de la largeur de la fenêtre de fit
  • Annexe C Évaluation de la parabole inverse de meilleur fit sur la "courbe en cloche"
  • Annexe D Application/Mesure de la grille - Évaluation à la loupe ou au microscope
  • Annexe E Tableaux de données expérimentales pour la validation du programme de calcul
  • Annexe F Représentation et description mathématique de la CLF
  • Annexe G Exemples de données relatives à des sections critiques
  • Annexe H Logigramme relatif au passage de la distribution des déformations mesurées aux valeurs de la CLF
  • Bibliographie
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