Authors: | Noll, Isabelle Bartel, Thorsten Menzel, Andreas |
Title: | A computational phase transformation model for selective laser melting processes |
Language (ISO): | en |
Abstract: | Selective laser melting (SLM) has gained large interest due to advanced manufacturing possibilities. However, the growing potential also necessitates reliable predictions of structures in particular regarding their long-term behaviour. The constitutive and structural response is thereby challenging to reproduce, due to the complex material behaviour. This motivates the aims of this contribution: To establish a material model that accounts for the behaviour of the different phases occurring during SLM but that still allows the use of (basic) process simulations. In particular, the present modelling framework explicitly takes into account the mass fractions of the different phases, their mass densities, and specific inelastic strain contributions. The thermomechanically fully coupled framework is implemented into the software Abaqus. The numerical examples emphasise the capabilities of the framework to predict, e.g., the residual stresses occurring in the final part. Furthermore, a postprocessing of averaged inelastic strains is presented yielding a micromechanics-based motivation for inherent strains. |
Subject Headings: | Additive manufacturing Finite element method Abaqus Residual stress Phase transformations |
Subject Headings (RSWK): | Rapid Prototyping <Fertigung> Finite-Elemente-Methode ABAQUS Eigenspannung Phasenumwandlung |
URI: | http://hdl.handle.net/2003/40156 http://dx.doi.org/10.17877/DE290R-22028 |
Issue Date: | 2020-09-02 |
Rights link: | https://creativecommons.org/licenses/by/4.0/ |
Appears in Collections: | Institut für Mechanik |
Files in This Item:
File | Description | Size | Format | |
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Noll2020_Article_AComputationalPhaseTransformat.pdf | 4.92 MB | Adobe PDF | View/Open |
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