Quasi-static and high strain rate properties of a cross-ply metal matrix composite

Abstract

a b s t r a c tA series of compression tests has been carried out at quasi-static and high strain rates on cylindrical samples of an alumina fiber/Al-6061 metal matrix composite. The composite plates were prepared with fibers in the 0• , 0/90 • and ±45• orientations. It was found that the mechanical properties were strongly dependent upon the imposed strain rate, with fracture stress increases of >50% being noted for several orientations at high strain rates: these increases are not believed to be related to strain rate sensitivity of either the matrix or fibers but to arise from the inertia of fragments which remain in place after fracture and continue to bear load. Also, and in contradiction to behavior anticipated from the rule of mixtures, it was found that 0/90• samples exhibited properties superior to those of 0 • unidirectional samples. Highspeed photography was used to confirm the sequence of deformation and fracture events at high strain rate.

Multi scale modeling and characterization of inelastic deformation mechanisms in continuous fiber and 2D woven fabric reinforced metal matrix composites

“…Compressive [23][24], tensile [25][26][27][28], bending [25], and fatigue [29] properties have been reported for loading applied along the fiber axis of unidirectional alumina fiber reinforced aluminum. Hall et al [30] studied the quasi-static and high strain rate properties of cross-ply unidirectional alumina reinforced aluminum MMC and found that the properties were strongly dependent on fiber distribution and alignment. Little experimental literature has been reported on the transverse properties of unidirectional alumina fiber reinforced aluminum or on the mechanical behavior of 2D woven fabric reinforced metal matrix composites.…”

Ballistic impact behavior of woven ceramic fabric reinforced metal matrix composites

“…11D. This damage mechanism has not been observed at low strain rates but is expected based on prior work on high strain rate testing of unidirectional Al 2 O 3 reinforced composites [13] and contributes to the overall energy absorbed by the target during ballistic impact.…”

“…The majority of the mechanical characterization of continuous unidirectional alumina fiber reinforced aluminum that has been reported in the literature has focused on studies of the strength and deformation mechanisms of the composite loaded along the fiber axis at quasi static strain rates [5,6,9e11], and comparatively little literature exists on the behavior of woven fabric MMC [8,12], or under high strain rate dynamic loading conditions [7,13]. Most examples of the ballistic impact behavior of MMC that have been previously studied are for particle reinforced MMC [14,15] and short fiber reinforced MMC [16,17], with comparatively little reported for fabric MMC.…”

Mechanical behavior of polyimide filament tows under high strain rate tension

“…2,3 In response to these urgent demands, research focused on high-performance fiber and their composites becomes a hot topic given their high strength, high toughness, 4 and unique anti-penetration mechanism different from metallic materials. 5 It is well-known that the protective effectiveness of bulletproof composites depends much on the mechanical properties of constituent fibers, 6 and former mechanism studies on fiber fracture indicate that the higher the fiber strength, the more the energy will be absorbed and dissipated when the fiber breaks, and thus the better the protective effect. 7 At present, high-performance fibers used for bulletproof mainly include para-aramid fiber and ultrahigh molecular weight polyethylene fiber.…”