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Structural Response Prediction of Thin-Walled Additively Manufactured Parts Considering Orthotropy, Thickness Dependency and Scatter
- Source :
- Materials, Vol 14, Iss 2463, p 2463 (2021), Materials, Volume 14, Issue 9
- Publication Year :
- 2021
- Publisher :
- MDPI AG, 2021.
-
Abstract
- Besides the design freedom offered by additive manufacturing, another asset lies within its potential to accelerate product development processes by rapid fabrication of functional prototypes. The premise to fully exploit this benefit for lightweight design is the accurate structural response prediction prior to part production. However, the peculiar material behavior, characterized by anisotropy, thickness dependency and scatter, still constitutes a major challenge. Hence, a modeling approach for finite element analysis that accounts for this inhomogeneous behavior is developed by example of laser-sintered short-fiber-reinforced polyamide 12. Orthotropic and thickness-dependent Young’s moduli and Poisson’s ratios were determined via quasi-static tensile tests. Thereof, material models were generated and implemented in a property mapping routine for finite element models. Additionally, a framework for stochastic finite element analysis was set up for the consideration of scatter in material properties. For validation, thin-walled parts on sub-component level were fabricated and tested in quasi-static three-point bending experiments. Elastic parameters showed considerable anisotropy, thickness dependency and scatter. A comparison of the predicted forces with experimentally evaluated reaction forces disclosed substantially improved accuracy when utilizing the novel inhomogeneous approach instead of conventional homogeneous approaches. Furthermore, the variability observed in the structural response of loaded parts could be reproduced by the stochastic simulations.
- Subjects :
- Technology
Microscopy
QC120-168.85
experimental testing
QH201-278.5
Engineering (General). Civil engineering (General)
Article
TK1-9971
carbon-fiber-reinforced polymers
thin-walled structures
Descriptive and experimental mechanics
orthotropy
property mapping
structural response prediction
stochastic finite element analysis
Electrical engineering. Electronics. Nuclear engineering
TA1-2040
additive manufacturing
thickness dependency
material modeling
Subjects
Details
- Language :
- English
- ISSN :
- 19961944
- Volume :
- 14
- Issue :
- 2463
- Database :
- OpenAIRE
- Journal :
- Materials
- Accession number :
- edsair.pmid.dedup....8746c944e8aed8940034303135432a69