Application of digital image correlation system for analysis of local plastic instabilities of perforated thin-walled bars

In the presented paper the local instabilities occurring in compression test of perforated thin-walled bars of low slenderness are observed using digital image correlation system ARAMIS. The tested samples slenderness is so low, that from theoretical point of view we are dealing with compression tes...

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Bibliographic Details
Published inMATEC Web of Conferences Vol. 196; p. 1032
Main Authors Piotrowski, Andrzej, Gajewski, Marcin, Ajdukiewicz, Cezary
Format Journal Article Conference Proceeding
LanguageEnglish
Published Les Ulis EDP Sciences 01.01.2018
Subjects
Compression tests
Deformation
Digital imaging
Elastoplasticity
Low carbon steels
Perforated shells
Plastic instability
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Summary:In the presented paper the local instabilities occurring in compression test of perforated thin-walled bars of low slenderness are observed using digital image correlation system ARAMIS. The tested samples slenderness is so low, that from theoretical point of view we are dealing with compression tests of some perforated shells. The samples are made from typical low carbon steel, which has to be treated as elasto-plastic material. Because of that, the final geometry of the sample (after unloading) is also analysed giving a good data for calibration of the theory of elasto-plasticity for large deformations. In analysed cases the total strain values are not exceptionally large, while local rotation (and permanent deformations) have significant values.
ISSN:2261-236X
2274-7214
2261-236X
DOI:10.1051/matecconf/201819601032