IMAGE-BASED FINITE ELEMENT MODEL DEVELOPMENT OF WELD ZONE FOR INVESTIGATION OF GUIDED WAVE INTERACTIONS

Abstract

This study aims to present a comprehensive approach utilizing CT (computed tomography) imaging and finite element modelling to investigate guided wave interactions within the weld zone. The methodology involves the acquisition of high-resolution CT scans to capture intricate details of the weld structure. Image segmentation techniques are applied to delineate the weld zone, distinguishing weld materials, boundaries, and potential defects. The segmented CT images are transformed into a 3D finite element model, generating a mesh that accurately represents the weld zone geometry. Material properties, derived from CT data and known material characteristics, are assigned to facilitate an accurate simulation environment.

Guided wave excitation sources are defined within the model to simulate wave propagation, considering various frequencies and waveforms. The finite element simulations enable the analysis of guided wave interactions, including dispersion, attenuation, reflection, and scattering phenomena within the weld zone. Validation against experimental data or analytical solutions ensures the accuracy of the developed model. The outcomes of this research will facilitate a profound understanding of guided wave behaviours specific to the weld zone. Insights that will be gained from the simulations aid in characterizing defects, evaluating structural integrity, and advancing non-destructive testing techniques.