Hydrodynamics

Publications

Numerical Simulation of Structural Deformation Under Shock and Impact Loads

This paper investigates a coupled multi-solver approach using AUTODYN to evaluate structural deformation under shock and impact loads, incorporating Lagrange, Euler, ALE, and SPH solvers to enhance accuracy in modeling reinforced concrete and high-strain rate phenomena.

Numerical modelling of dynamic response of underground openings under blasting based on field tests

This paper presents a numerical investigation of underground blasting tests using the LS-DYNA finite element code to assess the performance of ground support systems under dynamic loads. The study employs specific material models, such as the RHT model for rock and a JWL equation of state for the explosive, to simulate the dynamic response and crack patterns observed in field experiments. The finite element model was then used to analyze how different aspects of the blast design, including charg

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.