Fiber Composite Materials in an Arctic Environmentby Piyush K. Dutta, US Army Cold Regions Research &, Engineering Lab, United States,
Abstract: This paper summarizes a study on the behavior of light-weight structural composite materials in cold environments. Results are presented for two composite materials: fiberglass-epoxy and graphite-epoxy. The results show that low temperatures induce residual stresses in composites, which on developing microcracks can change both strength and stiffness properties of the composites. The strength degradation is severe at low temperatures in unidirectional composites when loaded in the fiber direction. In multilayered composites the material becomes weaker with increasing number of low-temperature thermal cycles.
Subject Headings: Laminated materials | Fabrics | Fiber reinforced composites | Construction materials | Material tests | Epoxy | Temperature effects | Structural behavior | Arctic
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