Predicting Dynamic Strain Amplification by Coupling a Finite Element StructuralAnalysis Code with a Gun Interior Ballistic Code

摘要

The dynamic strain amplification effect caused by a traveling pressure front in agun tube is examined by coupling a hydrodynamic finite element code, DYNA2D, with an interior ballistic code, IBRGAC. Results are presented comparing the circumferential stress response predictions for a pressure front traveling at constant velocity in a constant cross-section tube with theoretical results. Next, the response due to an accelerating pressure front is examined. Finally, the circumferential stress response due to an M829 projectile fired from an M256 tank cannon is determined using the coupled code.