The deformation induced stress softening strongly influences the material behaviour of the filled rubber and is a very complex issue. For the description of the anisotropic Mullins effect, there is still a lack of suitable experimental data. For this purpose, experiments with carbon black filled chloroprene rubber (CR) were carried out using multiple load steps. After repeated stretching in the same direction, a subsequent first loading in any other direction is characterised by a different stress–strain behaviour compared to the stabilised curve of the previous load. In order to emphasise the influence of the secondary loading direction on the material behaviour during that loading process, characteristic values are defined.
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