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Simulations of impact using the modified Gurson model
Norwegian University of Science and Technology, Faculty of Engineering Science and Technology, Department of Civil and Transport Engineering.
Norwegian University of Science and Technology, Faculty of Natural Sciences and Technology, Department of Physics.
2012 (English)MasteroppgaveStudent thesis
Abstract [en]

We have performed modified Gurson model calibrations to the steel alloys Weldox 460E, Weldox 700E and Weldox 900E through finite element method (FEM) simulations of various tensile material tests performed, and used these material models to perform FEM simulations of impact of blunt tool steel projectiles on target plates made out of these steel alloys. The purpose of these FEM simulations was to study the dependence of target plate steel alloy on the ballistic limit velocity of the projectile resulting from the modified Gurson model. It was found that the modified Gurson model is able to reproduce the dependence seen in experiments, but that it is strongly dependent on a certain model parameter related to the shear stress dependence on material damage. We have also discovered potential problems, and possible solutions, regarding the calibration of these material models and the use of them in the FEM impact simulations carried out.

Place, publisher, year, edition, pages
Institutt for fysikk , 2012. , 91 p.
Keyword [no]
ntnudaim:8078, MTBYGG Bygg- og miljøteknikk, Beregningsmekanikk, MTFYMA fysikk og matematikk, Teknisk fysikk
URN: urn:nbn:no:ntnu:diva-18779Local ID: ntnudaim:8078OAI: diva2:566258
Available from: 2012-11-08 Created: 2012-11-08 Last updated: 2013-06-23

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Department of Civil and Transport EngineeringDepartment of Physics

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