↓ Simulation of foldcores

Micro- and meso-level analysis of composite materials

The mechanical properties of composites are influenced by different factors. Those influences are the fiber architecture and process parameters.

The activities at IFB are concentrated on numerical characterisation of composite material with meso-mechanical models. The methods that are used are analytical ones and methods on the basis of the finite element method. With these approaches, it is possible to give answers about failure of the material and its stiffness. The picture shows a meso-model of a twill weave.

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Simulation of foldcores

Foldcores are produced by folding a planar base material into a three-dimensional structure. They are designed for usage as sandwich core material. Further general information can be found under Research→Light Construction→Foldcores.

Due to the design freedom with respect to unit cell geometry and base material, the mechanical properties of foldcores are variable. Mechanical properties are typically measured in tests (compression test and shear test). In order to reduce the testing effort methods are developed, which enable us to calculate the mechanical properties of foldcores.

FEM is used as simulation tool. Modelling has to incorporate various properties of foldcores. The major influence on mechanical properties is the base material and the unit cell geometry. Other characteristics are for example geometrical imperfections. They can cause a significant drop in stiffness and strength. When taking into account all characteristics, a realistic simulation of foldcores can be performed.

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