Guided Waves Tomography and Image Fusion for Damage Identification in Pipes

Hai Yan Zhang; Jian Bo Yu; Xian Hua Chen

doi:10.4028/www.scientific.net/AMM.94-96.1585

Paper Titles

Analysis the Cracks and Failure Modes of the External Walls of the LNG Storage Tank
p.1564

Static Analysis of Wind Energy Building under the Action of Equivalent Wind Load
p.1569

Durability of Glass Fiber Reinforced Polymer (GFRP) Bar Used as Concrete Reinforcement: Temperature Effect
p.1573

Investigation on the Index System for Durability of Concrete Bridges in Codes
p.1577

Guided Waves Tomography and Image Fusion for Damage Identification in Pipes
p.1585

The Experimental Study on Concrete-Filled Thin-Walled Square Steel Box Short Columns Fixed with Composite Steel Bar
p.1590

Study on Setting the Initial Nodal Temperature on the Joint Face of Concrete Dam
p.1596

The Study on Ductility of Thin-Walled Square Concrete-Filled Steel Tubular Short Columns Configured with Binding Rebars
p.1601

Guided Wave Tomography Using Simultaneous Iterative Reconstruction Technique Improved by Genetic Algorithm
p.1607

HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 94-96Guided Waves Tomography and Image Fusion for...

Guided Waves Tomography and Image Fusion for Damage Identification in Pipes

Abstract:

The detection of localized defects such as cracks and corrosion in pipes using guided waves has been shown to be an effective nondestructive evaluation technique for structural health monitoring (SHM). Cross borehole tomography in seismology is introduced into the guided wave inspection of a pipe when the pipe is considered as an unwrapped plate. Guided waves propagating in pipe with a crack defect are simulated using the finite element model and the arrival times for the fastest modes are extracted and sent to the tomographic algorithm. The tomographic reconstruction is based on the simultaneous iterative reconstruction technique (SIRT). For some cylindrical shell geometries such as stacked storage tanks, access to the entire circumference of the structure could be impractical or even impossible, three different image fusion techniques are used to enhance the image equality reconstructed from the incomplete datasets. The results show that the defect is more pronounced after imaging fusion.