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Title:The dynamic stability characteristics of damage-prone systems
Author(s):Williamson, Eric Brian
Doctoral Committee Chair(s):Hjelmstad, Keith D.
Department / Program:Civil and Environmental Engineering
Discipline:Civil and Environmental Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Applied Mechanics
Engineering, Civil
Abstract:The behavior of a simple mechanical system, experiencing large deformations and inelastic material response with damage, is presented. Because the differential equations that describe the motion are highly nonlinear and coupled for the multi-degree-of-freedom system, a numerical procedure was employed to determine the response. While most engineering approaches to the design of such systems utilize a static approach, results from this research indicate that static analyses cannot effectively predict the behavior of a dynamic, damage-prone system. Most importantly, the rate of damage accumulation will have the greatest impact on the stability properties of the system. In fact, for certain load cases, a system that accrues more damage may be less prone to instability than a system that suffers little damage. For this research, it was assumed that damage caused a reduction in the stiffness such that the structure experienced cyclic softening with increased cycles of loading. Application of the results to seismic-resistant design was considered.
Issue Date:1996
Rights Information:Copyright 1996 Williamson, Eric Brian
Date Available in IDEALS:2011-05-07
Identifier in Online Catalog:AAI9702715
OCLC Identifier:(UMI)AAI9702715

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