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GraphenMEX
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GraphenMEX

GraphenMEX: A design methodology approach for additive manufactured heat-generating structures - Combining geometry, manufacturing and material development

Sponsor: DFG

 

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Contact person: Lisa Windisch

Summary of the overall project

Due to the functional principle of layer-by-layer material application, additive manufacturing expands the design freedom of established, conventional tool-based or machining manufacturing processes. The combination of different materials to realise discrete material transitions without the need for additional joining processes offers great potential. This opens up possibilities for integrating material-specific properties. For example, heat-generating structures can be generated by introducing (nano) particles with electrically conductive properties. These properties can be customised locally based on factors such as the mass content, distribution or orientation of the particles. Areas of application for heat-generating functional structures include near-contour heating of component areas to increase climate comfort (e.g. electromobility) or local activation of shape memory polymers to realise actuators (4D printing).

Two key challenges are currently limiting their use. Firstly, the properties of the available thermoplastic particle composite materials are limited, particularly in terms of electrical conductivity. Secondly, there are hardly any methods to support product developers with regard to the systematic component conception, design and layout of additively manufactured heat-generating structures, especially taking into account the disperse and material-specific properties of the fillers.

Resultierende elektrische Bauteileigenschaften

Fig.: Project overview and interaction points with the project partners

Goals and tasks of iPAT

  • Systematic experimental investigation of the relationships between structure, material, process and geometry factors in relation to the electrical component properties
  • Analytical and numerical description of the anisotropic distribution and orientation of carbon-based filler materials in thermoplastics
  • Description and modelling of the process-structure-property relationships along the process chain
  • Derivation of rules for the design of additively manufactured heat-generating structures by elucidating the internal material structure across all process steps
  • Development of a numerical model that automatically generates design and process parameter recommendations for new materials

Project partner

Prof. Dr.-Ing. Thomas Vietor, Institut für Konstruktionstechnik (IK), TU Braunschweig

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