- 18 views
- 43 downloads
Impact Modeling and Dynamic Failure of Ballistic Steel Structures
-
- Author / Creator
- Mao, Luyue
-
In this thesis, an advanced stress-state- and strain-rate-dependent model, Generalized Incremental Stress State dependent damage MOdel (GISSMO), is implemented to predict the ballistic responses of Armox 500T steel under high-velocity impact in finite element solver LS-DYNA/Explicit. The GISSMO is calibrated using tensile simulations against the force-displacement data and validated using the comparisons between quantitative (e.g., projectile residual velocity and hole size after impact) and qualitative experimental measurements (e.g., fracture behaviors with plate spalling and bulging) from the literature. Then, the GISSMO is used to model ballistic responses of a bi-layer Armox 500T steel system. Here, ballistic simulations are conducted to explore the roles of the standoff distance and impact angle of obliquity on impact failure behaviors of bi-layered steel systems. Results indicate that a large increase of the projectile yaw and deflection is observed and measured from plates with no standoff distance and a 20 mm standoff distance under a 30 deg oblique impact from a fragment simulating projectile (FSP) compared with the normal impact. In addition, the standoff distance has a larger influence on projectile residual velocity when the FSP impacts the plate at an oblique angle of 30 deg. Overall, the work from this study demonstrates a better ballistic prediction for Armox 500T steel using the GISSMO and provides novel insights into lightweight and high-performing armor structures.
-
- Subjects / Keywords
-
- Graduation date
- Spring 2024
-
- Type of Item
- Thesis
-
- Degree
- Master of Science
-
- License
- This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.