Accession Number : ADA256328


Title :   Degradation and Failure Modes of Carbon/Bismaleimide Laminates Subjected to a Tropical Exposure


Descriptive Note : Final rept.


Corporate Author : ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS


Personal Author(s) : Underwood, J H ; Kapusta, A A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a256328.pdf


Report Date : Aug 1992


Pagination or Media Count : 16


Abstract : A scanning electron microscope (SEM) was used to characterize the degradation of the outermost layers of carbon/bismaleimide laminates as the result of exposure to a natural tropical environment. The surface that was exposed to the sun for 4000 hours suffered complete degradation of the bismaleimide matrix to a shallow depth. SEM fractography showed little difference in the appearance of the fibers in a carbon/bismaleimide laminate, which displayed considerable fiber pullout compared to fibers in a carbon/epoxy laminate, which displayed little pullout.


Descriptors :   *DEGRADATION , *LAMINATES , *FAILURE , SCANNING , FIBERS , TOUGHNESS , DEPTH , SURFACES , EPOXY LAMINATES , SHALLOW DEPTH , SUN , MICROSCOPES , ELECTRONS , FRACTOGRAPHY , CARBON , ELECTRON MICROSCOPES , LAYERS , SCANNING ELECTRON MICROSCOPES , ENVIRONMENTS


Subject Categories : Organic Chemistry
      Laminates and Composite Materials
      Textiles
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE