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Mitigation of EMU Cut Glove Hazard from Micrometeoroid and Orbital Debris Impacts on ISS HandrailsRecent cut damages sustained on crewmember gloves during extravehicular activity (ISS) onboard the International Space Station (ISS) have been caused by contact with sharp edges or a pinch point according to analysis of the damages. One potential source are protruding sharp edged crater lips from micrometeoroid and orbital debris (MMOD) impacts on metallic handrails along EVA translation paths. A number of hypervelocity impact tests were performed on ISS handrails, and found that mm-sized projectiles were capable of inducing crater lip heights two orders of magnitude above the minimum value for glove abrasion concerns. Two techniques were evaluated for mitigating the cut glove hazard of MMOD impacts on ISS handrails: flexible overwraps which act to limit contact between crewmember gloves and impact sites, and; alternate materials which form less hazardous impact crater profiles. In parallel with redesign efforts to increase the cut resilience of EMU gloves, the modifications to ISS handrails evaluated in this study provide the means to significantly reduce cut glove risk from MMOD impact craters
Document ID
20090012274
Acquisition Source
Johnson Space Center
Document Type
Preprint (Draft being sent to journal)
Authors
Ryan, Shannon (Universities Space Research Association Houston, TX, United States)
Christiansen, Eric L. (NASA Johnson Space Center Houston, TX, United States)
Davis, Bruce A. (Jacobs Technologies Engineering Science Contract Group Houston, TX, United States)
Ordonez, Erick (MEI Technologies, Inc. Houston, TX, United States)
Date Acquired
August 24, 2013
Publication Date
January 1, 2009
Subject Category
Space Transportation And Safety
Report/Patent Number
JSC-18010
Meeting Information
Meeting: 5th European Conference on Space Debris
Location: Darmstadt
Country: Germany
Start Date: March 30, 2009
End Date: April 2, 2009
Distribution Limits
Public
Copyright
Public Use Permitted.

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