Modern Non-destructive Testing & Evaluation (NDT & E) methods including Acoustic Emission (AE), Acousto-Ultrasonics (AU), Ultrasonics (UT), Digital Image Correlation (DIC) and Infrared Thermography (IRT) are used by TAMG to investigate:
- The state of existing damage in a wide range of modern materials including composites, alloys and smart materials, as well as structural components found in aerospace, marine, oil & gas and transportation industries.
- The tracking of deformation and damage development across time and length scales by combining traditional NDT&E methods with modern observational tools ranging from TEM/SEM to optical microscopes.
Nondestructive testing is further used as an integral part of a more general Structural Health Monitoring (SHM) system. As such, several NDT&E methods are currently used to collect information about parameters that are related to structural performance including displacements, strains and stresses. This information is combined with advanced post-processing tools to infer on the current operational state and remaining life.
Figure: Examples of NDT setups used for materials testing and SHM. (a) Placement of PZT sensors for AE, AU and UT during Mode I testing of a compact tension specimen (top) and actual setup (bottom). (b) Typical results from materials (top) and structural component (bottom) testing.
Figure: Overview of funded research program with U.S. Army PEO Soldier, “Non Destructive Approach For Damage Detection In Hard Armor Protective Inserts”. Project results include: Damage morphology characterization; Tap-test physics investigation; Novel technology/methodology assessment; Damage Metrics identification; Prototype concepts proposed.
Figure: Acoustic emission testing on full-scale aerospace structural component. Consulting project results include: Progressive Failure Evaluation; Damage Precursor Metrics; Critical Regions of Failure Initiation; Proposed calculation methodologies for evaluating component performance using AE data.
Figure: Feasibility test for an aerial inspection with multispectral imagery using a helicopter. The traffic was not stopped during the test and distance of 100ft was maintained by the pilot.
|J38. 2018||F. Althoey, B. Wisner, A. Kontsos and Y. Farnam, “Cementitious Materials Exposed to High Concentration of Sodium Chloride Solution: Formation of a Deleterious Chemical Phase Change”, Construction and Building Materials Vol. 167, pp. 543-552 (View)|
|J37. 2018||M. Matthew, Α. Ellenberg, S. Esola, M. McCarthy, I. Bartoli and A. Kontsos*, “Multiscale Deformation Measurements using Multispectral Optical Metrology“, Structural Control and Health Monitoring, (View)|
|J31. 2017||S. Esola, I. Bartoli, S.E. Horner, J.Q. Zheng and A. Kontsos*, “Defect detection via instrumented impact in thick-sectioned laminate composites”, Journal of Nondestructive Evaluation, Vol. 36, Article 47 (View)|
|J27. 2017||S. Rajaram, P.A. Vanniamparambil, F. Khan, M. Bolhassani, A. Koutras, I. Bartoli, F. Moon, A. Hamid, P. Benson Shing, J. Tyson and A. Kontsos*, “Full Field Deformation Measurements During Seismic Loading of Masonry Buildings”, Structural Control & Health Monitoring, Vol. 24 (4), pp. e1903 (View)|
|J24. 2016||J. A. Cuadra, K. P. Baxevanakis, M. Mazzotti I. Bartoli and A. Kontsos*, “Energy Dissipation via Acoustic Emission in Ductile Crack Initiation”, International Journal of Fracture, Vol. 199(1), pp. 89-104 (View)|
|J22. 2016||Α. Ellenberg, I. Bartoli, F. Moon and A. Kontsos*, “Bridge Related Damage Quantification using Aerial Vehicle Imagery“, Structural Control and Health Monitoring, DOI: 10.1002/stc.1831 (View)|
|J21. 2016||S. Rajaram, J. Cuadra, R. Saralaya, I. Bartoli and A. Kontsos*, “In situ CTE Measurements and Damage Detection Using Optical Metrology“, Measurement Science & Technology, Vol. 27, 025202|
|J19. 2014||A. Ellenberg, L. Branco, A. Krick, I. Bartoli and A. Kontsos, “Use of unmanned aerial vehicle for quantitative infrastructure evaluation”, Journal of Infrastructure Systems. (View)|
|J18. 2015||P.A. Vanniamparambil, R. Carmi, F. Khan, J. Cuadra, I. Bartoli and A. Kontsos, “An active-passive acoustics approach for bond-line condition monitoring in aerospace skin stiffener panels”, Journal of Aerospace Science and Technology, Vol. 43, pp. 289-300 (View)|
|J17. 2015||P.A. Vanniamparambil, U. Guclu, and A. Kontsos, “The identification of crack initiation using advanced acoustic emission analysis”, Experimental Mechanics, Vol. 55, pp. 837-850 (View)|
|J13. 2013||J. Cuadra, P.A. Vanniamparambil, K. Hazeli, I. Bartoli and A. Kontsos, “Damage Quantification in Polymer Composites using a Hybrid NDT Approach”, Composites Science and Technology, Vol. 83, pp. 11-21 (View)|
|J12. 2015||F. Khan, M. Bolhassani, A. Kontsos, A. Hamid, I. Bartoli. “Modeling and Experimental Implementation of Infrared Thermography on Concrete Masonry Structures”, Infared Physics and Technology, Vol. 69, pp. 228-237 (View)|
|J11. 2015||Khan, S. Rajaram, P.A. Vanniamparambil, M. Bolhassani, A. Hamid, A. Kontsos and I. Bartoli, “Multi-sensing NDT for damage assessment of concrete masonry walls”, Structural Control and Health Monitoring, Vol. 22, pp. 449-462 (View)|
|J10. 2014||P.A. Vanniamparambil, M. Bolhassani, R. Carmi, F. Khan, I. Bartoli, F. L Moon, A. Hamid and A. Kontsos, “A data fusion approach for progressive damage quantification in reinforced concrete masonry walls”, Smart Materials and Structures, Vol. 23, pp. 015007 (View)|
|J6. 2013||P.A. Vanniamparambil, F. Khan, K. Hazeli, J. Cuadra, E. Schwartz, A. Kontsos and I. Bartoli, “Novel Optico-Acoustic NDT for Wire Breaks Detection in Cables”, Structural Control and Health Monitoring, Vol. 20, pp. 1339-1350 (View)|
|J3. 2012||P.A. Vanniamparambil, I. Bartoli, K. Hazeli, J. Cuadra, E. Schwartz, R. Saralaya and A. Kontsos, “An integrated SHM approach for crack growth monitoring”, Journal of Intelligent Material Systems & Structures, Vol. 23(14), pp. 1563-1573 (View)|