TY - GEN
T1 - Use of nonlinear vibration frequencies and electrical conductivity measurements in the separation of internal and boundary damage in structures
AU - Butcher, Eric A.
AU - Sevostianov, Igor
AU - Sari, Ma'en S.
AU - Al-Shudeifat, Mohammad A.
PY - 2009
Y1 - 2009
N2 - The paper addresses one of the key problems in structural health monitoring -how to separate defects, both microscopic and macroscopic, accumulated in structural members from damage in the joints and boundaries. It is suggested to use a simultaneous set of measurements - nonlinear vibration frequencies and electrical conductivities - to distinguish between three distinct types of defects. Nonlinearities occur as a result of breathing internal cracks and slapping in damaged joints. The use of proper orthogonal decomposition and a local equivalent linear stiffness method allows for model updating to account for the damage. The theory is presented for full three-dimensional elastic solids and illustrated via the problem of a beam damaged both internally as well as at the boundaries.
AB - The paper addresses one of the key problems in structural health monitoring -how to separate defects, both microscopic and macroscopic, accumulated in structural members from damage in the joints and boundaries. It is suggested to use a simultaneous set of measurements - nonlinear vibration frequencies and electrical conductivities - to distinguish between three distinct types of defects. Nonlinearities occur as a result of breathing internal cracks and slapping in damaged joints. The use of proper orthogonal decomposition and a local equivalent linear stiffness method allows for model updating to account for the damage. The theory is presented for full three-dimensional elastic solids and illustrated via the problem of a beam damaged both internally as well as at the boundaries.
UR - http://www.scopus.com/inward/record.url?scp=69949165097&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=69949165097&partnerID=8YFLogxK
U2 - 10.1115/IMECE2008-66555
DO - 10.1115/IMECE2008-66555
M3 - Conference contribution
AN - SCOPUS:69949165097
SN - 9780791848722
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings
SP - 589
EP - 598
BT - 2008 Proceedings of the ASME International Mechanical Engineering Congress and Exposition, IMECE 2008
T2 - 2008 ASME International Mechanical Engineering Congress and Exposition, IMECE 2008
Y2 - 31 October 2008 through 6 November 2008
ER -