Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Potirniche, Gabriel

Committee Member

Cain, Bruce

Committee Member

Horstemeyer, Mark

Committee Member

Luck, Rogelio

Committee Member

Daniewicz, Steven

Date of Degree

8-11-2007

Original embargo terms

MSU Only Indefinitely

Document Type

Graduate Thesis - Campus Access Only

Major

Mechanical Engineering

Degree Name

Master of Science

College

James Worth Bagley College of Engineering

Department

Department of Mechanical Engineering

Abstract

Many computational methodologies have been developed over the years with the goal of characterizing damage presence in structural components. In this thesis two approached were investigated. The first approach covered in this thesis is the modeling of damage presence through the reduction of the modulus of elasticity. This approach was mainly applied to a cantilevered beam of uniform cross-section. Various crack configurations/orientations were investigated, and from this data equations relating modulus as a function of crack length were derived. The second approach deals with modifying the local flexibility at the location of damage through modification of the element stiffness matrix. This approach has certain advantages in that it can adequately capture the global modal and displacement effects of damage without the added computational effort of mesh refinement that is required for physically modeled cracks.

URI

https://hdl.handle.net/11668/16366

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