Publications

Publications

Finite Element Modelling of Failure of a Multi-Material Target due to High Velocity Space Impacts

Rade Vignjevic, Kevin Hughes, Emma A. Taylor

This study examines the limitations of Lagrangian finite element methods in modelling high velocity impacts, particularly the issue of severe mesh distortion under large deformations. To address this, an element erosion technique based on failure strain criteria is implemented and validated against experimental perforation data, enabling accurate prediction of ballistic limit curves for multi-layered aluminium targets.

Comparison and Validation of SPH and CEL Techniques for Modeling Hydrodynamic Ram

C. Sparks, R. Hinrichsen, D. Friedmann

This paper reviews computational techniques for predicting structural damage from hydrodynamic ram (HRAM), focusing on smoothed particle hydrodynamics (SPH) and coupled Euler-Lagrange (CEL) methods. Using LS-DYNA, simulations are compared with experimental data from projectile impact tests, evaluating pressure-time histories, projectile velocity decay, and high-speed photography.

Numerical Simulation Research on the Influence of Sensing Elements on EFP Forming

This study investigates the impact of various sensing elements on the formation of explosively formed penetrators (EFPs) using AUTODYN-2D and 3D simulations. The results provide insight into how design modifications, such as antennas and signal transmission pipes, affect EFP shape and performance, aiding in sensitive ammunition development.

3D Numerical Simulation Research on the Formation of Explosively Formed Penetrator with Fins

Journal of Beijing Institute of Technology

The paper presents AUTODYN-3D simulations for designing finned EFPs, achieving optimized shapes for improved stability and penetration.

Numerical Simulation of Section Subway Tunnel Under Surface Explosion

This study investigates the dynamic response of a subway tunnel section subjected to surface explosions using LS-DYNA, considering reinforcement bolts in the surrounding media. Numerical results show that the most vulnerable areas are the tunnel crown and bottom center, with the structure remaining safe under a 100 kg TNT explosion at 1.5 m height.