Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Horsetemeyer, F. Mark

Committee Member

Bammann, J. Douglas

Committee Member

Kadiri, el Haitham

Committee Member

Berry, T. John

Committee Member

Gullett, M. Phillip

Date of Degree

5-2-2009

Document Type

Dissertation - Open Access

Major

Mechanical Engineering

Degree Name

Doctor of Philosophy

College

James Worth Bagley College of Engineering

Department

Department of Mechanical Engineering

Abstract

In this work, understanding the microstructural effects on 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.

URI

https://hdl.handle.net/11668/15144

Comments

texture||fracture||Hopkinson bar

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