Temperature Dependent Dynamic Strain Localization and Failure of Ductile Polymeric Rods under Large Deformation

Ductile polymers have been increasingly applied in engineering applications to enhance the structural reliability under impact loading . Due limitation of experimental setup achieve large tensile deformation and difficulty dynamic force equilibrium, localization post-necking stages up fracture ductile at high strain rates less investigated. In present work, polymeric rods is studied on bespoke Hopkinson tension bar synchronized with a high-speed camera. Transparent polycarbonate (PC) used as model material study. Likewise, constitutive response behaviour are also characterized assistance Digital Image Correction (DIC) from low various temperature conditions. The results quantitatively show that local rate initially increases dramatically 200 % nominal due localization. This followed by rapid drop necking propagation, finally tends stay approximately 20 until fracture. elevated temperatures would result higher rates. Two models without consideration constant condition constructed for PC incorporated finite element simulations trend history respect successfully reproduced simulations. particularly simple amplification model, able reflect phenomenological key features experimentally observed macroscopic responses polycarbonate, find their potential resistant transparency design. • location monitored successfully. twice during necking, drops five times lower than Dynamic rod not apparently dependent corresponding conditions