What would be the pro's and cons of such an approach?
Quote from: sanman on 02/21/2017 04:28 PMWhat would be the pro's and cons of such an approach?not needed.
... The current NASA space suit, the Extravehicular Mobility Unit (EMU) show in Figure 1, provides no self-sealing feature to mitigate loss of pressure. The pressure bladder will continually leak if breached. The astronaut's safety is then dependent upon his or her ability to return to an airlock prior to depletion of the available oxygen supply. By design, the EMU provides 30 minutes of oxygen after sustaining a puncture no larger than 4 millimeters in diameter. Larger punctures result in shorter emergency return time. A self-sealing suit would afford greater protection, greatly enhancing crew safety in the event of a pressure bladder puncture. Prior experiments demonstrated that layers of viscoelastic material can self-seal and that sample space suit components can be manufactured with layers of viscoelastic materials.1,2 After a puncture of the space suit component, the viscoelastic material flows or creeps into the hole. The exact sealing mechanism has not been mathematically modeled, and, to date, only trial-and-error experimentation has generated results demonstrating self-sealing. Designs for suit components incorporating viscoelastic materials have not yet been proposed or optimized beyond coupon samples. This research seeks to develop an engineering approach to identify and optimize self-sealing designs for the use in the space environment.