Simulation Software for Fluids and SolidsSSI Simulation of a Beam falling on a Rubber Body
In this article we present a Structure-Structure Interaction (SSI) simulation of a beam falling onto a rubber body. We have computed three scenarios:
Figure 1: SSI rigid body simulation of beam falling on rubber body within NOGRID points
Figure 2: Animation of the rigid body simulation of a beam falling on a rubber body
Figure 3: SSI simulation of a rigid beam falling on an elastic rubber body within the NOGRID points' GUI
Figure 4: Animation of a SSI simulation of a rigid beam falling on an elastic rubber
Figure 5: GUI view on a SSI simulation of an elastic beam falling on an elastic rubber
Figure 6: Animation of SSI simulation of an elastic beam falling on an elastic rubber body
- Rigid Body Simulation: Both bodies behave as rigid bodies, and the impact is completely elastic. This is referred to as a so-called Rigid Body Simulation (RBS).
- In the second case, the falling beam remains a rigid body, while the other body behaves as a linearly elastic material (following Hooke's law), meaning it can undergo geometric deformation. This setup already represents a true Structure-Structure Interaction (SSI) Simulation. Since one body remains rigid, this is referred to as a one-sided structure-structure coupling.
- In the third case, both bodies behave as elastic solids and deform as a result of the collision. In this example, linear elasticity was assumed for both bodies, but any other nonlinear structural laws (e.g., Maxwell models) can also be applied.
Rigid Body Simulation (RBS) is the simulation of the transient motion of rigid bodies. Rigid body mechanics deals with physical bodies that do not deform. During the simulation, rigid bodies can move, but their shape or structure remain unchanged. Various types of forces can act on a rigid body, such as gravity, magnetic forces, or frictional forces. These forces cause the body to accelerate, changing its translational and rotational velocities. In addition, collisions between rigid bodies may occur, which abruptly alter the translational and rotational velocities of the bodies involved.
This model can serve as a basis for more complex structures, providing a better understanding of fluid-structure coupling and helping to improve your design in terms of efficiency and cost.
NOGRID points can is ideally suited for designing and problem solving for all kinds of FSI processes. It can predict structural deformation, temperature distribution, and cooling/heating rates. NOGRID points helps to understand the flow through the visualization of mass, momentum, and heat transfer of single and multiple phases. You receive integral quantities that can be used to analyze the efficiency of the SSI process.
Capabilities of NOGRID points CFD software
NOGRID points combines the capabilitiy to handle FSI problems, and allows the simulation of any conceivable geometry and operating mode, such as
- fully 3D computation solving the complete Navier-Stokes equations
- easy and intuitive setup also for SSI (Structure-Structure Interaction) cases
- freely definable material properties by equations or curves
- evaluation of chemical reactions and corresponding heat source terms
- open or closed domains, including inflow and outflow areas (non-batch mode)
- moving of parts
Why choose Nogrid?
NOGRID provides professional CFD software for the simulation of fluid flow, heat and mass transfer, and chemical reactions. Its efficient modelling workflow helps engineers analyse flow behaviour, evaluate designs and make informed decisions without creating a conventional volume mesh.
Faster model preparation
With NOGRID, only the geometry boundary needs to be meshed. The finite points inside the fluid domain are generated automatically according to user-defined settings, both at the start of the simulation and during the calculation.
This approach reduces preprocessing effort and makes it easier to prepare complex geometries and cavities for simulation.
Efficient CFD workflow
The modelling process follows four straightforward steps:
Build the geometry. Mesh the boundary. Define the simulation. Start the calculation.
NOGRID is designed to provide short computation times, including for applications involving complex cavities. Engineers can use the resulting data to examine flow distribution and other relevant flow characteristics.
Better insight into fluid-flow processes
CFD solves the fundamental equations governing fluid flow. NOGRID software enables engineers to predict and analyse the behaviour of fluids and related physical processes before or alongside physical testing.
The simulation results can support:
- evaluation and comparison of design alternatives
- optimisation of construction and operating parameters
- improved planning reliability
- reduction of development time and testing effort
- faster progression from design to market or operation
Steps from geometry generation to simulation results
TRAINING
Our two-day training courses teach participants how to set up, run and evaluate simulations efficiently with NOGRID CFD software. The courses include practical guidance for handling different types of simulation cases.
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Technical Support
Professional support is available from the beginning of your work with NOGRID. Our technical team assists users by telephone and email with software operation, case setup and simulation-related questions.
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Simulation Service
When internal time, expertise or resources are limited, NOGRID can support your project with individual numerical simulation services. Our engineers develop and evaluate CFD models based on the specific requirements of your application.
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