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dc.creatorGarner, Sarah
dc.creatorCarpenter, Lemuel
dc.creatorAkin, David
dc.date.accessioned2018-07-07T23:09:54Z
dc.date.available2018-07-07T23:09:54Z
dc.date.issued2018-07-08
dc.identifier.otherICES_2018_246
dc.identifier.urihttp://hdl.handle.net/2346/74196
dc.descriptionSarah Garner, University of Maryland
dc.descriptionLemuel Carpenter, University of Maryland
dc.descriptionDavid Akin, University of Maryland
dc.descriptionICES400: Extravehicular Activity: Space Suits
dc.descriptionThe 48th International Conference on Environmental Systems was held in Albuquerque, New Mexico, USA on 08 July 2018 through 12 July 2018.
dc.description.abstractHuman exploration beyond low Earth orbit will require increasing self-sufficiency in light of the logistics support challenge. One critical area is in spacesuit maintenance, parts replacement, and eventually in-situ manufacturing. An ongoing project at the University of Maryland (UMd) is exploring additive manufacturing (AM) for space suits, both “hard suits” entirely fabricated from feed stock, and “hard” elements of conventional hybrid suits. The current technology development focus is on the integral structural elements of bearings, and seals, and interfaces to the suit envelope. Prior work investigated the feasibility of “printing” full bearings, and led to the realization that current AM techniques are of insufficient precision to allow the fabrication of the bearing balls directly. Complete bearings were assessed for joint friction under varying loads, and tested to destruction to verify the ability to meet both pressurization and human loads with adequate factors of safety. Seals were fabricated of elastomeric 3D printed materials and tested for sealing performance and friction. Complete suit bearing prototypes consisting of both AM bearings and seals were fabricated and subjected to hydrostatic pneumatic load tests, as well as tested in the UMd glove box and cycled to determine operating lifetime. Based on these results, the best performing design that met all requirements was selected for the fabrication and test of a complete AX-5-type four-roll elbow module, which was integrated to soft goods upper and lower arm segments and terminated with a glove box sealed bearing on the proximal end and a standard glove disconnect on the distal end. This arm segment was then used for human factors evaluations in the UMd glovebox, including quantifying dexterity via a Fitts’ law protocol .en_US
dc.language.isoengen_US
dc.publisher48th International Conference on Environmental Systemsen_US
dc.subjectRapid Prototyping
dc.subjectSuit Simulator
dc.subjectPressurized Spacesuit
dc.subjectHard-shell Suits
dc.subjectConstant Volume Suit
dc.subjectBearings
dc.subjectSeals
dc.titleDeveloping Technologies and Techniques for Additive Manufacturing of Spacesuit Bearings and Sealsen_US
dc.typePresentationen_US


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