Powder Technology and Particle Simulation

We help you to make the production of dimensionally accurate and defect-free components more efficient by simulating powder technology process steps and chains. A second focus is the modeling and simulation of mechanisms and processes in which complex or particle-laden fluids play an essential role. Through this work, we improve products and processes, shorten development times and help our customers to save costs. Our simulation methods are diverse and we work with a wide range of granular material systems and particle-laden fluids.

We support you within these fields of application

 

Additive manufacturing

Additive manufacturing processes allow the close-to-final shape production of components with complex geometries. A large number of process parameters determine the microstructure created in the material and thus also the component properties. Depending on the powder used, the choice of process parameters that combine economic manufacturability and the desired component properties presents a challenge.

 

Powder pressing and sintering

Most powder technology process routes include two basic process steps: shaping and subsequent heat treatment. Pressing a powder into a mold is one of the most common shaping processes. Determining the optimal process parameters for new or modified processes and materials is often time-consuming. The increasing complexity of the manufactured components places additional demands on process control.

 

Drying, debinding 

Before sintering, shaping aids must be expelled from components manufactured using powder technology. Debinding and, in the case of fluid-based shaping processes, upstream drying is time-consuming, as too rapid process control can cause component damage such as inhomogeneous shrinkage and stresses due to pore pressure. We use simulation to find the optimum process parameters for fast and damage-free debinding.

 

Cutting, grinding and wear 

Surface wear can result in high maintenance costs and longer downtimes. When grinding, it is usually important to minimize the amount of energy used, while sawing loss also plays a role in cutting processes. With rounding, on the other hand, targeted material removal on the surface is desirable. 

 

Fluid-based shaping         

In screen printing or slip casting, a low to high viscosity fluid is used as a base, to which the highest possible proportion of solid particles is added. Depending on the process, this fluid is then for instance poured into a mold or pressed through a sieve. Typical questions revolve around viscosity as a function of loading, the influence of particle size and shape on the final packing and the flow field in the annex.

Software solutions and developments for companies

 

SimPARTIX

Based on physical models, SimPARTIX® is used to investigate a wide range of materials and processes in production and operation. By means of detailed analyses and visualization of the results, we provide insights into the fundamental dynamics of your processes and can subsequently optimize them.

 

User-specific routines for FE programs

Certain application areas in powder technology, such as powder compaction or sintering, are insufficiently covered by commercial FE packages such as Abaqus or Ansys. To close these gaps, we offer specific routines for direct coupling with these programs.

 

Web applications

Simple simulations and recurring data analyses can be efficiently executed as web applications. These special websites allow you to carry out your own calculations. For example, you can use web applications to create automated reports or carry out process optimizations.

R&D services for powder technology and particle simulation

Evaluating the influence of process and material parameters 


In many of the questions we are asked, the influence of process conditions and material parameters on the final product properties is of great importance. We offer two approaches: On the one hand, abstracted models and simplified approaches allow a quick evaluation of the essential parameters. On the other hand, complex numerical simulation models allow detailed insights into the processes taking place and specific optimization proposals. 

Development of material models


Commercial simulation packages often lack detailed material models, which are necessary for realistic predictions for specific manufacturing processes. At Fraunhofer IWM, we adapt existing material models for a number of selected powder technology processes to specific customer requirements. In addition, we offer the development of individual solutions to meet our customers' requirements. 

Determination of model parameters


Realistic numerical simulations require high-quality model parameters. By combining sophisticated experiments with targeted simulations, we create model parameter sets for defined simulation scenarios for our clients' Materials. These parameters can then be used either for in-house simulations or as a basis for further specific process simulations at Fraunhofer IWM to solve specific customer problems.

Development of digital twins

 

When mapping a real production process on a computer, we often speak of a digital twin. In cooperation with our customers, we develop executable digital twins for our own simulation code SimPARTIX as well as for common commercial FE packages. This reduces both the time required and the simulation know-how required by our customers and enables them to independently carry out their own simulations .

Why should my company collaborate with the Fraunhofer IWM in the fields of powder technology and particle simulation? 

With our integrated research approach, we build a bridge between your manufacturing process and the desired component properties. Depending on the problem, we look at individual process steps in detail or complete process chains. The combination of our simulations with targeted experiments ensures practice-relevant predictions.

As simulation experts with many years of experience in the application of various powder technology manufacturing processes, we can also realistically model your process on the computer. With our numerical and materials science know-how, we support our customers in the development of their own simulation models.

We stand for smooth and transparent project management. Direct and uncomplicated communication during the course of the project is a matter of course for us.

Powder Technology and Particle Simulation Group Publications

 

Articles in journals, books and at conferences as well as dissertations and project reports...