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To prepare new generations of robot systems for direct human-robot-cooperation new design criteria have to be set up, not only focussing on process specific characteristics but as well on a minimum hazard potential. In case of any ...

Against the background of passive safety features (i.e. automotive engineering) basic research is done on sandwich structures with core layers being made of cellular metals. Cellular metals exhibit distinct plastic-compressible ...

Metallic hollow sphere structures (MHSS) form a new group of advanced composite materials characterised by high geometry reproduction leading to stable mechanical and physical properties. The MHSS combine the well-known advantages of ...

A brief review of the standard Johnson-Cook model is presented. Three optional strain-rate forms are introduced and calibrated to laboratory data for A36 steel. Next a brief description of the LS-DYNA implementation of the new ...

In this article a constitutive formulation for transversely isotropic materials is presented taking large plastic deformation at small elastic strains into account. A scalar damage model is used for the approximation of the unloading ...

In this article a formulation of an anisotropic finite linear viscoelasticity model is proposed. In particular, transverse isotropy and orthotropy is considered. The aim of this work is to establish a material model, which allows the ...

Hyperelastic materials may exhibit anisotropic effects caused by fiber-reinforcement and filler-particles. In the latter case, anisotropy is induced by directional preconditioning during the production process where a microstructural ...

This paper presents several methods to examine fibre reinforced specimens at the three principle stress states and at different fibre orientations. The specimens for the different stress states were machined out of the same injection ...

The numerical simulation of the crash front in composite structures is up to now difficult. The reason is based on the complex failure phaenomena in the crushing area (fibre fracture, matrix failure, delamination, etc.). To improve ...

The increasing interest in the implementation of fiber reinforced materials for primary and secondary structures requires a closer look into the performance of these materials under a wide range of structural loads. This paper deals ...