Localized response of damaged structural systems

Giancarlo G. Bordonaro, Doug Harold, Muhammad R. Hajj, John Duke

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The effects of cracks in a composite beam-mass system on local and global strain caused by external excitation are examined. The natural frequency of the system varied around 8 Hz. Data from strain gage and fiber optics measurements before and after damaging the beam are compared. The results show a general agreement between the different sets of measurements. The level of noise varied between the different gratings and over different locations in individual gratings. From both sets of measurements, the response of the damaged beam has a lower amplitude in comparison with that of the undamaged beam. This indicates that higher damping is associated with the damage. Different ratios of the amplitudes of the response frequency for the undamaged and damaged beams over the regions where cracks were present than in the regions away from the cracks are obtained. This suggests a change in the shape of the excited mode of the beam when damaged.

Original languageEnglish
Title of host publication51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
StatePublished - 2010
Event51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Orlando, FL, United States
Duration: 12 Apr 201015 Apr 2010

Publication series

NameCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
ISSN (Print)0273-4508

Conference

Conference51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Country/TerritoryUnited States
CityOrlando, FL
Period12/04/1015/04/10

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