Plane strain tension fracture at high strain rate

Under plane stress conditions, most micromechanical and phenomenological models predict a minimum in ductility for strain tension state. Therefore, the state of plays crucial role many forming crash applications reliable measurement to fracture is particularly when calibrating modern initiation models. Recently, new experimental technique has been proposed measuring sheet metal after proportional loading under conditions. The basic configuration setup includes dihedral punch which applies out-of-plane onto Nakazima-type discshaped specimen with two symmetric holes an outer diameter 60 mm. In present work, applicability test extended high rates. High rates about 100/s 200/s are obtained using drop weight tower device original sensor load measurements. Quasi static tests also performed comparison, keeping same geometry, image recording parameters set-up. effective strains at compared from quasi-static rate three different materials, i.e one aluminium alloy steels.