Abstract
Damage initiation and evolution in SCS-6/Timetal 21S with quasiisotropic layup loaded under quasi-static and dynamic bending is investigated. When the axes of the fibers in the outer ply are transverse to the bending stress ([90/ 45/0] s layup), the bending strength is significantly lower and damage in the form of fiber-matrix separation initiates sooner than when the fibers in the outer ply are parallel to the bending stress ([0/ 45/90] s). The damage process and plasticity for dynamic bending is similar to quasi-static bending with the asymptotic damage level being the same for both. However, the rate of increase of damage with strain is smaller for dynamic bending compared to quasi-static bending. The energy dissipated in this titanium matrix composite under dynamic loading is smaller than either a graphite-fiber polymide-matrix composite or a glass-fiber bismaleimidematrix composite.
Published Version
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