# Simulation Forging Ship Shaft

Figure 1: CAD and surface mesh created in NOGRID's COMPASS

Figure 2: Setup the forging ship shaft case in the GUI

Figure 3: Results view of the forging ship shaft case in NOGRID points' GUI

Figure 4: Animation Forging Process

Figure 5: Real Forging Process (see: youtu.be/AgpGXSAS7Cs)

The simulation of forging of a ship shaft can perfectly be performed with NOGRID CFD software.

Forging is a manufacturing process involving the shaping of metal using localized compressive forces.  Forging can be classified according to the temperature at which forging is performed: cold, warm or hot forging.
In this case study the hot metal body is forged by two opposite hammers. The metal is computed as a viscoplastic material, where the viscous part is dominant.  As shown in figure 4 the initial body is far away from the geometry of the final product (a ship shaft) and the transformation to the final geometry requires a lot of pressing steps (or hammer blows).

In contrast to purely elastic bodies, a viscoelastic material has an elastic and a viscous part. The viscosity of a viscoelastic material gives the body a strain rate dependence over time. Purely elastic materials do not dissipate energy when a load is applied and then removed. However, a viscoelastic material dissipates energy when a load is applied and then removed. Viscoelastic behavior has elastic and viscous components modeled as linear combinations of springs and dampers, respectively.

If you want to compute forging proccesses then our meshless CFD software NOGRID points is a great choice. Based on the geometrical model which can either be imported from your CAD or created with our CAD preprocessor COMPASS you can generate a computer model of a specific geometry in a very short time (compared to mesh-based methods) and see its thermal characteristics in advance.

This model can give you a better understanding of the forging process and helps to improve your process regarding efficiency and costs. So, NOGRID points can perfectly be used for designing and problem solving for all kinds of forging. The thermal cooling and homogenizing, the temperature gradients and the cooling/heating rate can be predicted during the entire forging process. NOGRID points helps to understand the flow or displacements by visualization of the mass, momentum and heat transfer.

NOGRID unites abilities to handle stress-strain problems including moving parts in the domain and allows the simulation of any conceivable geometry and operation modes such as

• computation is in full 3D solving complete viscoelastic equations
• easy and intuitive setup thermal analysis 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
• moving of parts and boundaries

## Nogrid's strengths

NOGRID's particular strengths 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.

## 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 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.

For more details please refer to Training Courses →

## 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.

For more details please refer to Software Support

## 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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