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Title Forensic Finite Element Simulation of Skull Fracture
Author Skytte, Tina Lercke (Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
Institution Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark
Thesis level Master's thesis
Year 2010
Abstract The aim of this master's thesis is to construct 3D models of human skulls intended for investigation of skull fractures in forensic practice. Six models of the upper part of the skull bone were created from CT scans of humans and imported into the nite element software Abaqus. To model the propagation of a fracture, the extended nite element method was used, with damage for traction separation laws and maximum nominal stress as the damage criterion. Damage evolution was dened by energy. The models were used to investigate variations in the mechanical response between dierent skulls, to determine, if it is necessary to construct a specic model for each skull. Large dierences in the stiness of the skulls were found, but also the pattern of the damaged region varied. A parametric study showed, that the response of the models depend on the fracture energy and the nominal stresses. An increase in the fracture energy, reduce the size of the region of damage, as well as the severity of the damage. Changes in the nominal stresses had a huge eect on the models. By increasing all three of the nominal stress, the size of the fracture is reduced, while a decrease in the nominal stresses results in excessive damage. A change in one of the nominal stresses, may relocate the region of damage to other elements at the top of the skull. Further improvements of the models are needed, before they can be used in forensic practice. This also includes a validation of the models.
Imprint Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi : Roskilde
Pages 170
Keywords Materialer og energilagring; Materials and energy storage; Lette stærke materialer til energiformål; Light strong materials for energy purposes
Fulltext
Original PDF Tina_Lercke_Skytte_master.pdf (64.59 MB)
Admin Creation date: 2010-10-20    Update date: 2010-12-01    Source: dtu    ID: 268121    Original MXD