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Topology optimization using difference-based equivalent static loads

Triller, J. ; Immel, R. ; Harzheim, L. (2025)
Topology optimization using difference-based equivalent static loads.
In: Structural and Multidisciplinary Optimization, 2022, 65 (8)
doi: 10.26083/tuprints-00028467
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Topology optimization using difference-based equivalent static loads
Language: English
Date: 17 January 2025
Place of Publication: Darmstadt
Year of primary publication: August 2022
Place of primary publication: Berlin ; Heidelberg ; New York
Publisher: Springer
Journal or Publication Title: Structural and Multidisciplinary Optimization
Volume of the journal: 65
Issue Number: 8
Collation: 17 Seiten
DOI: 10.26083/tuprints-00028467
Corresponding Links:
Origin: Secondary publication DeepGreen
Abstract:

Topology optimization of crash-related problems usually involves a huge number of design variables as well as nonlinearities in geometry, material, and contact. The Equivalent Static Load (ESL) method provides an approach to solve such problems. This method has recently been extended under the name Difference-based Equivalent Static Load (DiESL) method to employ a set of Finite Element models, each describing the deformed geometry at an individual time step. Only sizing optimization problems were considered so far. In this paper, the DiESL method is extended to topology optimization utilizing a Solid Isotropic Material with Penalization approach (SIMP). The method is tested using an example of a rigid pole colliding with a simple beam, where the intrusion of the pole is minimized. The initial velocity of the pole is varied in order to examine the influence of inertia effects on the optimized structures. It is shown that the results differ significantly depending on the chosen initial velocity and, consequently, that they exhibit inertia effects. This cannot be seen in the results derived by the standard ESL method. Consequently, the results of the DiESL method’s show a considerable improvement compared to those of the standard ESL method.

Uncontrolled Keywords: DiESL, Equivalent Static Load Method, Crashworthiness, Topology optimization
Identification Number: Artikel-ID: 226
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-284671
Classification DDC: 500 Science and mathematics > 510 Mathematics
600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 16 Department of Mechanical Engineering > Institute of Numerical Methods in Mechanical Engineering (FNB) > Numerics
Date Deposited: 17 Jan 2025 10:18
Last Modified: 17 Jan 2025 10:19
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/28467
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