Heat Loads Due to Small Penetrations in Multilayer Insulation BlanketsAbstract: This paper covers cryogenic, tensile testing and research completed on a number of epoxies used in cryogenic applications. Epoxies are used in many different applications; however, this research focused on the use of epoxy used to bond MLI standoffs to cryogenic storage tanks and the loads imparted to the tank through the MLI. To conduct testing, samples were made from bare stainless steel, aluminum and primed aluminum. Testing involved slowly cooling test samples with liquid nitrogen then applying gradually increasing tensile loads to the epoxy. The testing evaluated the strength and durability of epoxies at cryogenic temperatures and serves as a base for future testing. The results of the tests showed that some epoxies withstood the harsh conditions while others failed. The two epoxies yielding the best results were Masterbond EP29LPSP and Scotch Weld 2216. For all metal surfaces tested, both epoxies had zero failures for up to 11.81 kg of mass.
Document ID
20180002103
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Johnson, W. L. (NASA Glenn Research Center Cleveland, OH, United States)
Heckle, K. W. (Sierra Lobo, Inc. Kennedy Space Center, FL, United States)
Fesmire, J. E. (NASA Kennedy Space Center Cocoa Beach, FL, United States)