Development of a numerically robust material model for rock salt
|Bearbeitung:||M. Eng. Mathias Grehn, Prof. Dr.-Ing. Udo Nackenhorst|
Around 300000 tons of high-level radioactive waste exists on earth and around 12000 tons of high-level radioactive waste will be added every year. Possible solutions for storage of radioactive waste are salt domes as reservoirs for toxic and nuclear waste. Nuclear waste has a long half-life time, for this reason we need a robust and reliable computational techniques for long term prediction of creep behavior from rock salt.
At time we use a new approach to describe the material behavior of rock salt. The primary creep phase is described by a viscoelastic material model. The secondary creep phase is described by a Norton creep law.
To depict the material behavior we must find out the material parameter for the new approach. For this reason we want recalculate the laboratory tests. The laboratory tests was prepared by the BGR and TUC. The picture shows a destroyed rock salt sample after a creep test. The aim of this work is to create a numerical robust material model for rock salt.