The effect of the Peierls barrier on a discrete dislocation plasticity model for BCC iron

Tjebbes, Thije (2023) The effect of the Peierls barrier on a discrete dislocation plasticity model for BCC iron. Bachelor's Thesis, Applied Physics.

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Abstract

An existing 2D discrete dislocation plasticity (DDP) model of BCC iron is enhanced by adding the Peierls barrier. The model is fitted to an experimental stress-strain curve of BCC iron based on the method presented by Katiyar and Van der Giessen in [1]. It was found that using this fitting procedure it is possible to create a realistic representation of BCC iron with the addition of the Peierls barrier. However, the addition of the Peierls barrier did have some implications on the predictions. Both the dislocation as the obstacle density were increased to acquire the desired stress-strain curve. The dislocation density was compared to experimental data as well, which showed that the dislocation density at larger strain values, for 0.4% strain and more, matches the experimental data better for an increased Peierls barrier.

Item Type:	Thesis (Bachelor's Thesis)
Supervisor name:	Giessen, E. van der
Degree programme:	Applied Physics
Thesis type:	Bachelor's Thesis
Language:	English
Date Deposited:	17 Jul 2023 09:36
Last Modified:	17 Jul 2023 09:36
URI:	https://fse.studenttheses.ub.rug.nl/id/eprint/30566

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