In this work, the microstructural effects of stress state and strain rate dependent plasticity, damage, and failure of aluminum and magnesium alloys were examined. Several experimental techniques were employed to implement the test data into a physics-based internal state variable plasticity-damage model. Effects arising from various strain rates, stress states, and material orientations were quantified and discussed within the framework of linking microstructural features to mechanical properties. The method developed for determining structure-property relations was validated by accurately capturing the effects for a variety of materials and loading conditions. The end result is a methodology capable of predicting the onset of damage and failure for a material loaded under complex dynamic conditions.
|Advisor:||Horstemeyer, Mark F.|
|Commitee:||Bammann, Douglas J., Berry, John T., El Kadiri, Haitham, Gullett, Phillip M.|
|School:||Mississippi State University|
|School Location:||United States -- Mississippi|
|Source:||DAI-B 70/04, Dissertation Abstracts International|
|Subjects:||Mechanical engineering, Materials science|
|Keywords:||Aluminum, Damage, Failure, Hopkinson bar, Magnesium, Plasticity|
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