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Design, development and testing of 3D-printed conformal energy absorbing structures

Schröder, Silvio und Grimm, Christian und Witte, Lars und Dimassi, Adli und Buchholz, Philip (2023) Design, development and testing of 3D-printed conformal energy absorbing structures. Materials Today Communications. Elsevier. doi: 10.1016/j.mtcomm.2023.106204. ISSN 2352-4928.

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Kurzfassung

Landing a spacecraft on a foreign body is a key challenge to explore new worlds. Besides the task of approach and decent the landing has to nullify the residual kinetic energy. For large or medium-sized landers this will be done by the landing gear with shock absorbers inside the landing legs. For small landers alternative ways of reducing the shocks of the touchdown have to be developed, since the landing gear has a higher mass fraction when the lander gets smaller. A suitable method for protecting a lander from the shock of impact is a crushable shell, which absorbs the kinetic energy at touchdown by plastic deformation of its core material. The core material is commonly made of aluminum honeycomb which is very lightweight and has a constant energy dissipation characteristic. On the other hand, the materials stiffness strongly relates to the direction of load, since tilted load transfers reduce the energy absorptivity drastically. This applies specially for landers with no active guidance and control ability. In those cases, the entire vehicle has to be covered with crushable elements with the honeycomb cells aligned accordingly. A new and innovative method of omni-directional crash protection is a metal grid which can be manufactured additively. With this feature the lander can land in any inclination without losing crush performance. In this paper the development of a 3D-printed energy absorbing structure is presented. Hardware tests have shown the effectiveness of this method in comparison to the benchmark of honeycomb shock absorbers.

elib-URL des Eintrags:https://elib.dlr.de/195663/
Dokumentart:Zeitschriftenbeitrag
Titel:Design, development and testing of 3D-printed conformal energy absorbing structures
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Schröder, SilvioSilvio.Schroeder (at) dlr.dehttps://orcid.org/0000-0001-6159-1535138653482
Grimm, ChristianChristian.Grimm (at) dlr.dehttps://orcid.org/0000-0003-4490-7424155326623
Witte, LarsLars.Witte (at) dlr.dehttps://orcid.org/0000-0002-3921-2524NICHT SPEZIFIZIERT
Dimassi, AdliFIBRENICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Buchholz, PhilipMaterialise GmbHNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:18 Mai 2023
Erschienen in:Materials Today Communications
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
DOI:10.1016/j.mtcomm.2023.106204
Verlag:Elsevier
ISSN:2352-4928
Status:veröffentlicht
Stichwörter:Additive manufacturing, Crushable structures, Honeycomb shock absorbers, Impact testing, Landing & Mobility Test Facility
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erforschung des Weltraums
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):R - Landetechnologien (Mikrolandesysteme für Insitu-Science)
Standort: Bremen
Institute & Einrichtungen:Institut für Raumfahrtsysteme > Land und Explorationstechnologie
Hinterlegt von: Schröder, Silvio
Hinterlegt am:14 Jul 2023 10:02
Letzte Änderung:13 Mär 2024 12:30

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