GTD notably presents two important drawbacks: it is theoretically valid for a canonical infinite edge and not for a finite one and presents discontinuities around the direction of specular reflection. This paper is especially focused on possible improvements of the Geometrical Theory of Diffraction ( GTD), one classical method used for modelling diffraction from scatterer edges. There exist two main scattering phenomena: specular reflection and diffraction. The scattering of elastic waves from an obstacle is of great interest in ultrasonic Non Destructive Evaluation (NDE). International Nuclear Information System (INIS) Ya Ufimtsev on PTD - two closely.Įlastodynamic models for extending GTD to penumbra and finite size flaws The year 2012 celebrates the 50th anniversary of the seminal works of J.B. ![]() ![]() ![]() This paper reviews research in the Geometrical Theory of Diffraction ( GTD) and the Physical Theory of Diffraction (PTD) at the Technical University of Denmark (DTU).
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