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BS EN ISO 16808:2022

$142.49

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

Published By Publication Date Number of Pages
BSI 2022 32
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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.

PDF Catalog

PDF Pages PDF Title
2 undefined
4 European foreword
Endorsement notice
6 Foreword
7 1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
8 5 Principle
9 6 Test equipment
11 7 Optical measurement system
12 8 Test piece
8.1 General
8.2 Application of grid
8.2.1 Type of grid
8.2.2 Grid application
9 Procedure
13 10 Evaluation methods for the determination of the curvature and strains at the pole
14 11 Calculation of biaxial stress-strain curves
15 12 Test report
17 Annex A (informative) Test procedure for a quality check of the optical measurement system
20 Annex B (informative) Computation of the curvature on the basis of a response surface
22 Annex C (informative) Determination of the equi-biaxial stress point of the yield locus and the hardening curve
30 Bibliography
BS EN ISO 16808:2022
$142.49