Internal structure and compression anisotropy of FDM-printed 3D elements using FEM [Estructura interna y anisotropía en compresión de elementos 3D impresos con FDM mediante FEM]
Errata: An alert was received regarding possible plagiarism in the article entitled ‘Effects of anisotropy and infill pattern on compression properties of 3D printed CFRP: mechanical analysis and elasto-plastic finite element modelling’, by authors Francesco Bandinelli, Martina Scapin and Lorenzo Peroni. In order to avoid controversy, the authors of the article ‘Internal structure and anisotropy in compression of 3D elements printed with FDM using FEM’ made changes to the original document. The article was republished with modifications that eliminate the possibility of plagiarism. This clarification is made because the potentially plagiarised information did not affect the conclusions of the work, either in its original or modified version.
DOI:
https://doi.org/10.62574/rmpi.v5iTecnologia.290Keywords:
plastics, industrial design, physical propertiesAbstract
Finite Element (FE) analysis is a key tool in the design and verification of 3D printed components. The correct characterisation of their anisotropic properties and raster angles allows for the development of efficient models. This study uses compression tests to characterise FDM-manufactured PLA, modelling its behaviour with FE. Post-processed specimens are used to minimise external process defects. The elastoplastic model includes an elastic stiffness matrix, Hill's anisotropic yield criterion and Voce's isotropic hardening law, considering the stacking sequence of the raster angles. The FE analysis, performed in LS-DYNA, reproduces the compressive behaviour of the material, capturing the evolution of the stress and the deformed shapes until the onset of damage. The deformation and damage mechanisms depend on the orientation and raster angle.
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