Simulation of PLC effect using regularized large-strain elasto-plasticity
Authors:
- Marzena Mucha,
- Balbina Wcisło,
- Jerzy Pamin
Abstract
The purpose of this paper is to develop a constitutive description and to numerically simulate a propagating instability phenomenon called the Portevin-Le Chatelier (PLC) effect, which is observed for metallic materials. It manifests itself by moving plastic shear bands in the sample and serrations in the stress-strain diagram. In this paper, the PLC is modeled by geometrically non-linear thermo-visco-plasticity with the hardening function of the Estrin-McCormick type to reproduce a serrated response. To regularize softening, which in this model comes from thermal, geometrical and strain-rate effects, the viscosity and heat conductivity are incorporated. Plasticity description can additionally include degradation of the yield strength, and then the model is enhanced by higher-order gradients. Simulations are performed using AceGen/FEM. Two tensioned specimens are tested: a rod and a dog-bone sample. The first specimen is used for general verification. The results obtained for the second specimen are compared with the experimental results. Studies for different values of model parameters are performed. The results of the simulations are in good agreement with the experimental outcome and the sensitivity to model parameters is in line with the expectations for the pre-peak regime. In the presented tests, the gradient enhancement does not significantly influence the results.
- Record ID
- CUTb594c1fb667d4499a87e4fd01ba747f3
- Publication categories
- ;
- Author
- Journal series
- Materials, ISSN , e-ISSN 1996-1944, Biweekly
- Issue year
- 2022
- Vol
- 15
- No
- 12
- Pages
- [1-21]
- Article number
- 4327
- Other elements of collation
- rys.; tab.; wykr.; Bibliografia (na s.) - 19-21; Bibliografia (liczba pozycji) - 68; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 15, Iss. 12, Spec. Iss.
- Substantive notes
- Special Issue: Computational Mechanics of Structures and Materials
- Keywords in English
- PLC effect, visco-plasticity, thermo-mechanical coupling, gradient enhancement, FEM
- ASJC Classification
- DOI
- DOI:10.3390/ma15124327 Opening in a new tab
- URL
- https://www.mdpi.com/1996-1944/15/12/4327 Opening in a new tab
- Related project
- Analiza numeryczna propagujących się niestateczności w termoplastyczności przy dużych odkształceniach. . Project leader at PK: , ,
Projects financed by NSC [Projekty finansowane przez NCN] - Language
- eng (en) English
- License
- Score (nominal)
- 140
- Score source
- journalList
- Score
- Publication indicators
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTb594c1fb667d4499a87e4fd01ba747f3/
- URN
urn:pkr-prod:CUTb594c1fb667d4499a87e4fd01ba747f3
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.