Results of the 2007 UT Modeling Benchmark Using Two Semi-Analytical Beam Propagation and Flaw Scattering

RESULTS OF THE 2007 UT MODELING BENCHMARK USING TWO SEMI-ANALYTICAL BEAM PROPAGATION AND FLAW SCATTERING MODEL R. Raillon', S. Chatillon', S. Mahaut' and M. Spies^'' CEA, LIST, Centre de Saclay, point courrier 120, F-91191 Gif-sur-Yvette cedex, France Fraunhofer Institute for Nondestructive Testing IZFP, 66123 Saarbruecken, Germany re for Techno- & Economy Mathematics ITWM, 67663 Kaiserslautem, Germany ABSTRACT. This paper presents some applications of ultrasonic (UT) simulation codes developed at IZFP, Germany and at CEA LIST, France, those latter being integrated into the CIVA software platform. These UT simulation codes are dedicated to the prediction of echo-responses from flaws. Results given and discussed are those obtained for the various problems of the 2007 UT Benchmark modeling session. They concern the responses from flat-bottomed holes inside curved blocks (concave or convex) inspected with immersed probes. The simulation codes are used to investigate the influence of the curvature upon the amplitude response of the flaw with respect to a flat specimen, used as a reference. Comparison with experimental results is also discussed. Keywords: Ultrasonic Benchmark, UT Simulation, Semi-Analytical Model, Curvature Study PACS: 43.35.Yb INTRODUCTION For several years, the Center for NDE at Iowa State University proposes an annual benchmark study in which simulated results (in either ultrasonic or eddy current NDT configurations) obtained with ...