Dissertation/Thesis Abstract

Structure-property stress state dependent relationships under varying strain rates
by Tucker, Matthew Taylor, Ph.D., Mississippi State University, 2009, 104; 3352295
Abstract (Summary)

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.

Indexing (document details)
Advisor: Horstemeyer, Mark F.
Commitee: Bammann, Douglas J., Berry, John T., El Kadiri, Haitham, Gullett, Phillip M.
School: Mississippi State University
Department: Mechanical Engineering
School Location: United States -- Mississippi
Source: DAI-B 70/04, Dissertation Abstracts International
Source Type: DISSERTATION
Subjects: Mechanical engineering, Materials science
Keywords: Aluminum, Damage, Failure, Hopkinson bar, Magnesium, Plasticity
Publication Number: 3352295
ISBN: 9781109088861
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