Ultrasonic Defect Detection of Structural Plates Using Quasi-Rayleigh Waves

Journal Title: Strojnicky casopis - Journal of Mechanical Engineering - Year 2017, Vol 67, Issue 2

Abstract

This article discusses the application of so-called ultrasonic quasi-Rayleigh waves to detect surface defects of mechanical constructions, namely plate structures. The application of quasi-Rayleigh waves allows the extension of the scope of detection using conventional ultrasonic methods that are based on bulk waves. This extension means larger distances as well as higher sensitivity of the detection of surface defects such as fatigue or corrosion cracks. An advantage of this method is the transfer of wave energy from one side of a plate to another, which helps to overcome one-sided obstacles (such as cross-pieces, reinforcement elements). The article describes characteristic properties of quasi-Rayleigh waves that are important for the proper (in terms of frequency in particular) design of the excitation of waves towards the structure. FEM simulation results then provide information regarding the sensitivity of the wave response to the presence and sizes of surface defects (perpendicular slots) in an isotropic material with the properties of steel. The theoretical knowledge is set against experimental measurements obtained with the use of a steel plate with cross-pieces welded to it.

Authors and Affiliations

Michal Hlavatý, Ladislav Starek, Miloš Musil and Branislav Hučko

Keywords

Related Articles

Experimental Evaluation of Mechanical Properties of Friction Welded Dissimilar Steels under Varying Axial Pressures

The present study emphasizes on joints two industrially important materials AISI 304 with AISI 1021steels, produced by friction welding have been investigated. Samples were welded under different axial pressures rangin...

Analysis of Bolt Bending in Preloaded Bolted Joints

Classical analysis methods are applied to show how flexural deflections due to shear strain in the flange pack produce bending moments and tensile loads on bolts within preloaded bolted joints. It was found that in joi...

The Effect of the Free Surface on the Singular Stress Field at the Fatigue Crack Front

Description of stress singularity in the vicinity of a free surface is presented. Its presence causes the retardation of the fatigue crack growth in that region and fatigue crack is being curved. Numerical model is used...

Influence of Bypass on Thermo-Hydraulics of VVER 440 Fuel Assembly

The paper deals with CFD modelling and simulation of coolant flow within the nuclear reactor VVER 440 fuel assembly. The influence of coolant flow in bypass on the temperature distribution at the outlet of the fuel ass...

FSW Numerical Simulation of Aluminium Plates by SYSWELD - Part II

Friction Stir Welding (FSW) is one of the most effective solid state joining processes and has numerous potential applications in many industries. The simulation process can provide the evolution of physicals quantitie...

Download PDF file
  • EP ID EP43914
  • DOI https://doi.org/10.1515/scjme-2017-0016
  • Views 209
  • Downloads 0

How To Cite

Michal Hlavatý, Ladislav Starek, Miloš Musil and Branislav Hučko (2017). Ultrasonic Defect Detection of Structural Plates Using Quasi-Rayleigh Waves. Strojnicky casopis - Journal of Mechanical Engineering, 67(2), -. https://europub.co.uk/articles/-A-43914