Investigation of different material models in finite element analysis for fracture simulation of cortical bone
Background to the work: Periprosthetic fractures are one of the most common reasons for revision of a hip stem and are a particular problem with cementless implanted hip stems. Simulations can support research into fracture mechanisms and thus, for example, investigate the influence of certain implant geometries. However, the accuracy and informative value of the simulation depends heavily on the input parameters, such as the selected material models. No typical material model for bone is available in current simulation software and the anisotropic structure of the cortical bone poses a further challenge. Nevertheless, some of the material models with the appropriate parameters can also be adapted and used for modeling bone (fractures).
Task definition: The aim of the thesis is to find a suitable material model for the simulation of fractures in cortical bone within the simulation software Abaqus. To this end, the theories of various material models are first to be developed in a literature search. Bending tests with animal cortical bone will be used to generate comparative data for investigating the mechanical (fracture) behavior. The bending test is then to be simulated in an FE analysis with the various material models and validated using the experimental data.
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Investigation of different material models in finite element analysis for fracture simulation of cortical bone
Background to the work: Periprosthetic fractures are one of the most common reasons for revision of a hip stem and are a particular problem with a problem especially with cementless implanted hip stems. Simulations can support research into fracture mechanisms and thus, for example, investigate the influence of certain implant geometries. However, the accuracy and validity of the simulation depends heavily on the input parameters, such as the selected material models. In the common simulation software does not include a typical material model for bone. Nevertheless Nevertheless, some of the material models with the appropriate parameters can also be adapted for modeling bone
(fracture) modeling.
Task definition: The aim of this thesis is to investigate and evaluate different material models for trabecular bone with regard to their
failure behavior under compressive load. For this purpose, the theories of the different material models are to be developed in a literature research will be developed. Compression tests are to be carried out with animal trabecular bone, which will serve as comparative data. The compression test will then be simulated in the simulation software Abaqus using various material models and evaluated using the experimental results. evaluated on the basis of the experimental results.
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