Remarks on the sources of error in the modelling of lunar geotechnical structures

• Autorzy: Cafaro F. , Miticocchio E. , Marzulli V.

Identyfikatory

DOI

10.2478/sgem-2018-0012

• Języki publikacji: EN

Abstrakty

EN

Scale modelling should be a very useful strategy for the design of lunar structures. Preventing structural damages in the lunar environment is crucial and scale models are helpful to achieve this aim. The size of these models must be scaled to take into account the different gravitational levels. Since the lunar gravity acceleration is about one-sixth of the terrestrial one, it follows that the models on Earth will be very smaller than the prototype to be realized on the Moon. This strategy will represent an opportunity for engineers working on lunar structure design, provided that the errors, both computational and experimental, related to the change of scale are quantified, allowing reliable extension of the physical scale modeling results to the prototype. In this work, a three-dimensional finite element analysis of walls retaining lunar regolith backfill is described and discussed, in order to provide preliminary results, which can guide a future experimental investigation based on physical scale-modelling. In particular, computational errors related to the scale effects are assessed, with respect to a virtual prototype of the lunar geotechnical structure, and compared with errors from other sources of discrepancy, like the adopted constitutive model, the variability of the geotechnical parameters and the calculation section used in the 3D analysis. The results seem to suggest the soundness of this strategy of modelling and are likely to encourage new research, both numerical and experimental, supporting the structure serviceability assessment.

Słowa kluczowe

EN

lunar geotechnical structures; physical scale-modelling; lunar regolith; numerical simulations; retaining wall

• Wydawca: De Gruyter
• Czasopismo: Studia Geotechnica et Mechanica
• Rocznik: 2018
• Tom: Vol. 40, nr 2
• Strony: 133--139
• Opis fizyczny: Bibliogr. 16 poz., rys., tab.

Twórcy

autor

Cafaro F.

• Politecnico di Bari, Department of Civil, Environmental, Land, Building Engineering and Chemistry, via Orabona 4, 70125 Bari, Italy

autor

Miticocchio E.

• Politecnico di Bari, Department of Civil, Environmental, Land, Building Engineering and Chemistry, via Orabona 4, 70125 Bari, Italy

autor

Marzulli V.

• Friedrich-Alexander Universität Erlangen-Nürnberg, Institute for Multiscale Simulation, Nägelsbachstrasse 49b, 91052 Erlangen, Germany

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).