On the incorporation of a micromechanical material model into the inherent strain method—Application to the modeling of selective laser melting
(2021) In GAMM Mitteilungen 44(3).- Abstract
When developing reliable and useful models for selective laser melting processes of large parts, various simplifications are necessary to achieve computationally efficient simulations. Due to the complex processes taking place during the manufacturing of such parts, especially the material and heat source models influence the simulation results. If accurate predictions of residual stresses and deformation are desired, both complete temperature history and mechanical behavior have to be included in a thermomechanical model. In this article, we combine a multiscale approach using the inherent strain method with a newly developed phase transformation model. With the help of this model, which is based on energy densities and energy... (More)
When developing reliable and useful models for selective laser melting processes of large parts, various simplifications are necessary to achieve computationally efficient simulations. Due to the complex processes taking place during the manufacturing of such parts, especially the material and heat source models influence the simulation results. If accurate predictions of residual stresses and deformation are desired, both complete temperature history and mechanical behavior have to be included in a thermomechanical model. In this article, we combine a multiscale approach using the inherent strain method with a newly developed phase transformation model. With the help of this model, which is based on energy densities and energy minimization, the three states of the material, namely, powder, molten, and resolidified material, are explicitly incorporated into the thermomechanically fully coupled finite-element-based process model of the micromechanically motivated laser heat source model and the simplified layer hatch model.
(Less)
- author
- Noll, Isabelle ; Bartel, Thorsten and Menzel, Andreas LU
- organization
- publishing date
- 2021-09
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- additive manufacturing, finite element method, inherent strain, multiscale framework, phase transformation
- in
- GAMM Mitteilungen
- volume
- 44
- issue
- 3
- article number
- e202100015
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- scopus:85114612172
- ISSN
- 0936-7195
- DOI
- 10.1002/gamm.202100015
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2021 The Authors. GAMM - Mitteilungen published by Wiley-VCH GmbH.
- id
- dd96cdd8-5ae9-49ff-bead-31b24e4bd02d
- date added to LUP
- 2021-10-18 15:47:41
- date last changed
- 2022-04-27 04:54:08
@article{dd96cdd8-5ae9-49ff-bead-31b24e4bd02d,
abstract = {{<p>When developing reliable and useful models for selective laser melting processes of large parts, various simplifications are necessary to achieve computationally efficient simulations. Due to the complex processes taking place during the manufacturing of such parts, especially the material and heat source models influence the simulation results. If accurate predictions of residual stresses and deformation are desired, both complete temperature history and mechanical behavior have to be included in a thermomechanical model. In this article, we combine a multiscale approach using the inherent strain method with a newly developed phase transformation model. With the help of this model, which is based on energy densities and energy minimization, the three states of the material, namely, powder, molten, and resolidified material, are explicitly incorporated into the thermomechanically fully coupled finite-element-based process model of the micromechanically motivated laser heat source model and the simplified layer hatch model.</p>}},
author = {{Noll, Isabelle and Bartel, Thorsten and Menzel, Andreas}},
issn = {{0936-7195}},
keywords = {{additive manufacturing; finite element method; inherent strain; multiscale framework; phase transformation}},
language = {{eng}},
number = {{3}},
publisher = {{John Wiley & Sons Inc.}},
series = {{GAMM Mitteilungen}},
title = {{On the incorporation of a micromechanical material model into the inherent strain method—Application to the modeling of selective laser melting}},
url = {{http://dx.doi.org/10.1002/gamm.202100015}},
doi = {{10.1002/gamm.202100015}},
volume = {{44}},
year = {{2021}},
}