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PROF. DR. MESCHKE Master’s Thesis Numerical modelling of visco-elastoplastic behavior of partially frozen soils Supervisor: Dr.-Ing. Meng-Meng Zhou Background: Due to the viscoelastic nature of ice and the complex interac- tion between the soil grains and pore phases (film water and crystal ice), fro- zen soil exhibits time-dependent behavior such as creep and relaxation. This time-dependency or rate-dependency can lead to a decrease in strength and stiffness from 40% to 60% of their initial values. Task: Within this master thesis the following tasks are to be completed: -- Study on existing elastoplastic constitutive models namely „extended BBM“ -- Extension to visco-elastoplastic by considering further the rate-dependency -- Implementation of the extended constitutive model in FE code „Kratos“ -- Model verification and validation -- (Numerical application) Contact: Dr.-Ing. Meng-Meng Zhou Raum: IC 6 / 169 Lehrstuhl für Statik und Dynamik Ruhr-Universität Bochum Tel: 0234-32-29059 Email: [email protected] www.sd.rub.de 3. Juli 2014
