3D concrete printing: A lower bound analytical model for buildability performance quantification
By J. Kruger, S. Zeranka, G. V. van Zijl. Automation in Construction, 2019
256 citations recorded by the source corpus.
Abstract Concrete structures are 3D printed in the plastic state, therefore emphasis should be placed on the rheological characterisation of these materials to ensure that they are appropriate for 3D printing as well as for quality control. In this research, an analytical model based on the novel rheological characterisation of a material is presented as a method for quantifying the buildability performance of a 3D printable concrete/mortar. Structural instability of a freshly printed object e.g. elastic buckling is not accounted for as this model is only based on physical nonlinearity, in particular plastic yielding. The failure mechanism is based on the Mohr-Coulomb failure criterion, and incorporates Tresca and Rankine limit functions, dependent on the degree of confinement. The model is considered a lower bound theorem as stress redistribution occurs in the printed filament layers. The model is verified via an experimental study that yields a conservative error of
Subfields: Automotive Engineering, Building and Construction, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/3f3571c94bdbd71f3383e96f5f696b7c48723a9a
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In Automotive Engineering
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Citations in the corpus
- A review of 3D printed concrete: Performance requirements, testing measurements and mix design (2020, methodology): “A lower bound analytical model was proposed to evaluate the buildability for plastic yielding of the bottom critical layer considering the stress redistribution of the printed layers in the printing process by Kruger et al. [48].”
- 3D printing eco-friendly concrete containing under-utilised and waste solids as aggregates (2021, unknown): “The failure of the buildability has three modes: collapsing failures, shear failures, and buckling failures [44 – 47].”