The dynamic stability characteristics of damage-prone systems

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.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Civil and Environmental Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Williamson, Eric Brian

Contributors dc:contributor

• Hjelmstad, Keith D.

• Applied Mechanics
• Engineering, Civil

Statement dc:rights

• Copyright 1996 Williamson, Eric Brian

Language dc:language

eng

Identifier

9780591089141
AAI9702715
(UMI)AAI9702715

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/23332