Journal article
Quasi-static and cyclic failure behavior of electric sheet material



Publication Details
Authors:
Bode, B.; Brückner-Foit, A.; Zeismann, F.
Publishing status:
In press / published online in advance
ISSN:
0142-1123

Abstract
The failure behavior of electric sheet material is investigated under quasi-static and under fatigue loading. Specimen were cut from plates, but also from punched rotor sheets. It was found that the S-N-curve is almost a horizontal line with the maximum stress at endurance limit just below the elastic limit in a tensile test. Cyclic failure was caused by shallow notches caused by plastic deformation in the manufacturing process or by angular holes formed by debonded AlN particles. Local plastic deformation was analyzed using high resolution orientation microscopy. No slip bands were found during cyclic loading; instead, there were some kind of wide-spread deformation bands in which cyclic plasticity was localized. These findings are related to the observed failure behavior.


Keywords
crack initiation, Crack initiation, fatigue, fracture, non-oriented electrical steel, thin sheet

Last updated on 2019-25-07 at 14:53