TY - CONF
T1 - Use of lamb waves to predict current damaged state of mortar
AU - Keller, Michael S.
AU - Kundu, Tribikram
AU - Desai, Chandrakant S.
N1 - Funding Information:
We wish to acknowledge discussions with Peter Bodenhei-mer. This research was supported by NASA under grant NAG5-7515 and by NSF grants AST-9415423, AST-9618548, and AST-9727875.
Funding Information:
We wish to acknowledge discussions with Peter Bodenheimer. This research was supported by NASA under grant NAG5-7515 and by NSF grants AST-9415423, AST-9618548, and AST-9727875.
PY - 2001
Y1 - 2001
N2 - This paper describes the experimental and analytical results for the development of a methodology for predicting the current state of simulated concrete (mortar) in infrastructure. The nondestructive Lamb wave technique is used to experimentally identify the disturbance (damage) before and after mechanical testing of mortar specimens, which is used in the initial research as a substitute for concrete. The mortar specimens are tested to measure their stress-strain response under uniaxial compression and tension loading. The results of the nondestructive and mechanical stress-strain testing are correlated to develop the model based on the Disturbed State Concept (DSC), a unified approach for modeling material behavior. This model can allow evaluation of the deformation moduli, strength and degredation (damage) at a given state during the life of the material. This information can be used to design rehabilitation strategies. It can also lead to the development of new computer based equipment that can be used in the field for defining the remaining life. At this time, the research involved one-dimensional testing. The proposed methodology can, however, be extended and improved by conducting two- and three-dimensional testing of concrete specimens.
AB - This paper describes the experimental and analytical results for the development of a methodology for predicting the current state of simulated concrete (mortar) in infrastructure. The nondestructive Lamb wave technique is used to experimentally identify the disturbance (damage) before and after mechanical testing of mortar specimens, which is used in the initial research as a substitute for concrete. The mortar specimens are tested to measure their stress-strain response under uniaxial compression and tension loading. The results of the nondestructive and mechanical stress-strain testing are correlated to develop the model based on the Disturbed State Concept (DSC), a unified approach for modeling material behavior. This model can allow evaluation of the deformation moduli, strength and degredation (damage) at a given state during the life of the material. This information can be used to design rehabilitation strategies. It can also lead to the development of new computer based equipment that can be used in the field for defining the remaining life. At this time, the research involved one-dimensional testing. The proposed methodology can, however, be extended and improved by conducting two- and three-dimensional testing of concrete specimens.
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M3 - Paper
AN - SCOPUS:0242576369
SP - 9
EP - 20
T2 - 2001 ASME International Mechanical Engineering Congress and Exposition
Y2 - 11 November 2001 through 16 November 2001
ER -