Ultrasonic scattering attenuation in nodular cast iron : experimental and simulation studies

Santos, Mário (author), Santos, Jaime (author)

This work evaluates the ultrasonic scattering attenuation of structures with complex scatterer distributions via experimental and simulation studies. The proposed approach uses experimental attenuation knowledge to infer the scatterer size and its concentration in the studied structures, which are important for the effective construction of simulated models. The MATLAB k-Wave toolbox has been used to implement the simulator. Several cast-iron samples have been used to demonstrate the importance of simulation in the characterization of such structures. First, the scattering attenuation was evaluated using the Truell and Papadakis models, and then the results were compared with experimental ones. Emphasis was given to the Papadakis approach because it takes into account the scatterer size distribution. It is demonstrated that both analytical models provide results that are far from the experimental ones. The developed simulator for the studied samples led to a predictive model, in which the attenuation was proportional to the fifth power of the scatterer size, and the corresponding formulation is close to the one proposed by the analytical models.

• Language: English
• Keywords: modelling, anisotropy, pulse-echo, simulation, ultrasonic attenuation
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2021
• Number of pages: Str. 245-255
• Numbering: Vol. 67, no. 5
• PID: 20.500.12556/RUL-128416
• UDC: 620.179.16
• ISSN on article: 0039-2480
• DOI: 10.5545/sv-jme.2020.7078
• COBISS.SI-ID: 69927171
• Publication date in RUL: 12.07.2021

Record is a part of a journal

• Title: Strojniški vestnik
• Shortened title: Stroj. vestn.
• Publisher: Zveza strojnih inženirjev in tehnikov Slovenije [etc.], = Association of Mechanical Engineers and Technicians of Slovenia [etc.
• ISSN: 0039-2480
• COBISS.SI-ID: 762116

Secondary language

• Language: Slovenian
• Title: Slabitev ultrazvočnih valov v nodularni litini z razpršitvijo: eksperimentalna študija in simulacija
• Keywords: modeliranje, anizotropija, impulzna ultrazvočna metoda, simulacija, slabitev ultrazvoka