SPH in Abaqus

Introduction of Abaqus SPH (Smoothed particle hydrodynamics)

Abaqus SPH (Smoothed particle hydrodynamics) is a computational method which uses for simulating the continuum media mechanics. This method is useable for solid mechanics and fluid flow analysis. It has been used in various research fields, including astrophysics, ballistics, volcanology, and oceanography. SPH method is a mesh-free Lagrangian method (where the coordinates move with the fluid), and the resolution of the method could be defined and set based on some variables like density.

particles can be generated per parent element, or particles can be generated based on a uniform background grid. These two conversion techniques make use to turn Lagrangian elements to SPH particles.  

The conversion technique of generating particles per parent element is intended to be used when the original finite element mesh deformations are significant and elements may distort. Traditionally, in such cases, deletion of the soon-to-be distorted Lagrangian elements would be the only choice to allow the analysis to continue. Converting to SPH particles offers an improvement over the element deletion method because the generated particles can provide resistance to deformation beyond finite element distortion levels. Consequently, element deletion and element conversion can’t use together.

Workshop 1: Bird Strike Simulation in Abaqus

Firstly, in the first workshop, we implemented a simulation of a bird strike in Abaqus. To simulate this phenomenon, we model the bird as a cylindrical mass of water and crash it into the fuselage.

Workshop 2: Bullet Movement through Water Pipe in Abaqus

The second workshop describes the movement of water in a pipe after the passage of the bullet. For severe collisions between water and solid, it is necessary to define SPH in the mesh module and consider specified boundary conditions.

Workshop 3: Simulation of water mixing (Ball drop into the water container)

In this workshop, we simulate the drop fall into a container full of water. Gravity assigns to drop and water in the container because when the drop falls into the water, the excess water should go in the right direction.

Workshop 4: Simulation of Waterjet cleaning in Abaqus

This workshop investigated Waterjet cleaning over a plate for cleaning purposes. The modeling of this particle is hydrodynamics (SPH) method and for the material model, Us-Up equations have been placed. You can also see the Mises stress pattern of a point in the waterjet path.

Workshop 5: Simulation of Waterjet cutting in Abaqus

In this workshop, a plate was cutting with high-pressure water flow. Cutting with a water jet is a method for cutting objects using energy from high speed. The plate modeled as solid and for failure, during the impact make use of the Johnson cook damage model.