Epoxy resins have been the predominant matrix materials for high-performance reinforced filament-wound composites since the early pioneering days of the late 1940s [1]. Over the years, a wide range of applications has been developed for reinforced filament-wound epoxy structures ranging from sporting goods to military/aerospace [2]. This expansion of end uses has resulted mainly from the unique performance properties and structures attainable by combining the versatility of epoxy resins [3] with the advancements in both the filament winding technology [4, 5] and the fiber reinforcements [6].