The deformation and failure mechanism of cylindrical shell and square plate with pre-formed holes under blast loading

The deformation and failure mechanism of cylindrical shells square plate with pre-formed holes under blast loading were investigated numerically by employing the Ansys 17.0 Ls-Dyna 971. To calibrate numerical model, experiments plates circle modeled results have a good agreement experiment data. calibrated model was used to study subjected loading. structure response stress field changing process has been divided into four specific stages discussed systematically. local global curves, degree damage, change status modes shell circular are obtained, compared analyzed, it can be concluded as: (1) transition tensile fields is due geometrical characteristic arch configuration; (2) existence not only lead increasing concentration around holes, but also release during whole process; (3) There three two kinds for respectively. standoff distance key influence on forming location crack initiating point locus propagation; (4) better performance than blast-resistant capability at smaller distance, while reduction bigger that shell.