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Influence of material layer thicknesses on the mechanical properties and forming behaviour of three-layer sandwich composite materials

(Kopie 3)

Project Leader: Prof. H. Palkowski (Dr.Eng) (Institute for Metallurgy), Prof. St. Hartmann (Dr.Eng) (Institute for Technical Mechanics)

Funding period: 3 years (2012 - 2015)
Funding body:
DFG
Funding reference: -

In this project, a sheet composite material with metallic cover layers and polymer core layers will be considered. In addition to the properties of the respective monomaterials, the layer thickness of the sandwich partners plays a significant role here. As of yet there is no knowledge of these dependencies and the goal is to acquire this knowledge in this project. To this end, the characteristic values of select sandwich composites, consisting of a PP-PE film as the core layer and cover layers made from deep-drawn steel, in each case with different layer thickness combinations, are to be characterised using various experimental tests, and their forming behaviour analysed in deep-drawing and bending tests. The results of these experimental analyses are a prerequisite for the numerical analysis of these composite materials. In addition to this, temperature-dependent material models of the individual composite partners are being developed, implemented and used for validation purposes. The sought after mathematical description serves to minimise the expensive conducting of experimental procedure. In addition, the characteristic values are required for the development of a property matrix, in order to be able to determine a material and layer thickness combinations that is as optimally suited to given boundary conditions as is possible.

 

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