Local Plastic Instabilities of Perforated Thin-Walled Bars – FEM Modelling and DIC Verification

Andrzej Michał Piotrowski , Marcin Daniel Gajewski , Cezary Witold Ajdukiewicz

Abstract

In this paper results of testing and modelling of perforated thin-walled bars of low slenderness are shown. Tested and modelled elements in general are used as structural elements for storage systems. In such case the compression mode is dominant, so the proper understanding of the element behaviour in post-critical stage is essential for system safety estimation. To predict post critical behaviour the suitable constitutive models of elasto-plasticity are needed. The most essential to such simulations is the fact that local deformations and rotation angles are significant, so the large deformation modelling regarding to geometry and constitutive models have to be used. In the paper for FEM (finite element method) modelling the ABAQUS system is used, and obtained solutions are verified experimentally using Instron 8802 universal testing machine. Aside from measuring critical forces and final deformations for several samples and eight different bar’s lengths, also strain and displacement fields were verified with application of DIC (digital image correlation) system ARAMIS. Because of the testing machine and DIC system limitations only very low slenderness (1÷11) samples were taken into account. Bars of such a low slenderness should be treated as shells or three dimensional objects in numerical modelling
Author Andrzej Michał Piotrowski (FCE / ICE)
Andrzej Michał Piotrowski,,
- The Institute of Civil Engineering
, Marcin Daniel Gajewski (FCE / ICE)
Marcin Daniel Gajewski,,
- The Institute of Civil Engineering
, Cezary Witold Ajdukiewicz (FCE / ICE)
Cezary Witold Ajdukiewicz,,
- The Institute of Civil Engineering
Journal seriesMaterials Research Proceedings, ISSN 2474-3941, e-ISSN 2474-395X, (0 pkt)
Issue year2019
Vol12
Pages71-76
Publication size in sheets0.5
Conference28th Symposium on Experimental Mechanics of Solids, 17-10-2018 - 20-10-2018, Jachranka, Polska
Keywords in PolishMES, pręty cienkościenne, testy,
Keywords in EnglishFEM, Modelling, Digital Image Correlation, Buckling, critical Forces, Post-Critical Modes,Thin-Walled Bars, Perforated Bars
DOIDOI:10.21741/9781644900215-10
Languageen angielski
File
local plastics.pdf 17.26 MB
Score (nominal)5
Score sourcejournalList
ScoreMinisterial score = 5.0, 05-12-2019, ArticleFromJournal
Publication indicators WoS Citations = 0
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