SSI 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:

SSI rigid body simulation beam falls on rubber body, computed with NOGRID points CFD software

Figure 1: SSI rigid body simulation of beam falling on rubber body within NOGRID points

Animation of the rigid body simulation of a beam falling on a rubber body, computed with NOGRID points CFD software

Figure 2: Animation of the rigid body simulation of a beam falling on a rubber body

SSI simulation of a rigid beam falling on an elastic rubber within the NOGRID points CFD software's GUI

Figure 3: SSI simulation of a rigid beam falling on an elastic rubber body within the NOGRID points' GUI

Animation of a SSI simulation of a rigid beam falling on an elastic rubber, computed with NOGRID points CFD software

Figure 4: Animation of a SSI simulation of a rigid beam falling on an elastic rubber

GUI view on the SSI simulation of an elastic beam falling on an elastic rubber body, computed with NOGRID points CFD software

Figure 5: GUI view on a SSI simulation of an elastic beam falling on an elastic rubber

Animation of SSI simulation of an elastic beam falling on an elastic rubber body, computed with NOGRID points CFD software

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 abilitiy to handle FSI problems and allows the simulation of any conceivable geometry and operating mode, such as

computation is in full 3D solving complete Navier-Stokes-Equations
easy and intuitive setup also for SSI (Structure-Structure-Interaction) cases
free 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

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Nogrid's strengths

Particular strengths of NOGRID's fluid flow CFD software are the rapid preprocessing (no fluid grid needs to be generated, only the boundary mesh, inner finite points are generated automatically depending on User setting initially and during computation), and the outstandingly short computation time even for complicated cavities.

As you can see in the image below, the boundary of the geometry still requires a mesh to allow the interior finite points to detect the boundary. The boundary must therefore be meshed and the finite points inside are automatically generated during the simulation controlled by User specifications.

Easy and fast modelling: Build geometry, mesh boundary, setup the case and start computation

What is CFD from NOGRID?

CFD solves the fundamental equations that define the fluid flow process. With CFD software from NOGRID every engineer makes better decisions by predicting, analyzing and controlling fluid flow, heat and mass transfer or chemical reaction. By using NOGRID software for flow modeling you receive information on essential flow characteristics as for example flow distribution. Using it additional to testing and experimentation NOGRID software helps to improve the evaluation of your design – resulting in better construction and operation parameters, increasing planning security and money savings due to faster time to the marketplace for your product or process.

Choose NOGRID

With NOGRID, you choose professional CFD software and services – our aim is helping you to be successful. When you decide to work with NOGRID you choose close cooperation with a dynamic, flat hierarchies-organization. Short information channels result in quick and accurate professional support and service. Our team consists of highly qualified employees, who are experts in fields such as numerical simulation or computational fluid dynamics. Based on our know-how, we are pleased to offer the following services, responding to your individual requirements:

TRAINING

In our two-days training courses you will learn, how to use NOGRID CFD software efficiently. Our technical support team will teach you how to handle and solve different cases.

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Technical Support

We offer full professional support from the minute you start using our software, by telephone or by email. Contact us, when ever needed.

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Service

Lack of time or resources and other constraints often make outsourcing an attractive solution. We help you with your flow modeling needs. Based on our engineering expertise in this field we offer individual numerical simulation services matching the unique needs of your organization.

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