Strain rate and temperature dependent strain localization of dynamically stretched lightweight bars: from metal to polymer

This work studies the dynamic strain localization and constitutive relationship of a Ti3Al2.5V alloy in jet engine containment system transparent polycarbonate conceived for aircraft canopy application by Digital Image Correlation (DIC) technique from quasi-static condition to high rates at different temperatures. The responses two materials show significant rate temperature sensitivities. Observations that local can reach values up 1000 % nominal necking zone. However, soars during softening then decreases rapidly with propagation, eventually becomes 20 until fracture. Appropriate viscoplastic models are determined both materials, which incorporated finite element simulations reveal trend evolution tensile tests. present shows kinds typical lightweight should be addressed carefully Split Hopkinson Tension Bar (SHTB)